CA2020033A1 - Camera selection and positioning system and method - Google Patents
Camera selection and positioning system and methodInfo
- Publication number
- CA2020033A1 CA2020033A1 CA002020033A CA2020033A CA2020033A1 CA 2020033 A1 CA2020033 A1 CA 2020033A1 CA 002020033 A CA002020033 A CA 002020033A CA 2020033 A CA2020033 A CA 2020033A CA 2020033 A1 CA2020033 A1 CA 2020033A1
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- CA
- Canada
- Prior art keywords
- camera
- video
- monitor
- remote
- cameras
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
- G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
- G08B13/19678—User interface
- G08B13/19689—Remote control of cameras, e.g. remote orientation or image zooming control for a PTZ camera
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
- G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
- G08B13/19639—Details of the system layout
- G08B13/19641—Multiple cameras having overlapping views on a single scene
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
- G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
- G08B13/19678—User interface
- G08B13/19682—Graphic User Interface [GUI] presenting system data to the user, e.g. information on a screen helping a user interacting with an alarm system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Closed-Circuit Television Systems (AREA)
Abstract
ABSTRACT OF THE INVENTION
An apparatus for a closed circuit television network having a plurality of video cameras producing video signals, a plurality of video display monitors and a video switcher apparatus coupled therebetween, comprising control apparatus coupled to the video switcher apparatus for controlling which video signals are displayed on each of the plurality of video display monitors. Also provided are graphics user interface apparatus coupled to the control apparatus for permitting a user to operate the control apparatus, thereby permitting the user to control which video signals are displayed on the plurality of video display monitors.
An apparatus for a closed circuit television network having a plurality of video cameras producing video signals, a plurality of video display monitors and a video switcher apparatus coupled therebetween, comprising control apparatus coupled to the video switcher apparatus for controlling which video signals are displayed on each of the plurality of video display monitors. Also provided are graphics user interface apparatus coupled to the control apparatus for permitting a user to operate the control apparatus, thereby permitting the user to control which video signals are displayed on the plurality of video display monitors.
Description
2020~33 CAMERA SELECTION AND POSITIONING SYSTEM AND METHOD
BACKGROUND OF THE INVENTION
Field of the Invention. The present invention relates to control systems for closed circuit television observa-tion systems. More specifically, the present invention relates to a closed circuit television observation system controlled by a computer and accessed by a graphic user interface.
Summary of the Prior Art. For quite some time now, closed circuit video cameras have been used as monitors.
They have been used for security purposes and also for observation purposes, i.e., hospitals, etc. The primary use, however, has been for security. For example, prisons, military bases and private real estate, etc. use closed circuit television networks to provide security.
Often the closed circuit security setup includes a plurality of video cameras, a plurality of video monitors, a video switching unit and some type of mechanical inter-face which allows the user to determine which video camera output signals are going to be displayed on the monitors.
The user can physically select which of the cameras the user wants to appear on a particular monitor. Thus, the user will have perhaps 50 or 100 cameras and will be able to select which of the plurality of cameras he wishes to display on the monitor(s). The user effects the A-~9548/SCS/SJAl -l-selection of cameras to view on the monitor(s) by flicking switches or pushing buttons located on the monitoring console.
The video switcher may be interfaced to an external alarm system and an alarm event may then cause a prede-termined camera and view to be selected and displayed. It is not always clear to the user, where the source of video is coming from when the video is switched automatically.
Typically any one of the monitors may be setup to display a user selected sequence of camera views. Each view is held for a matter of seconds and then sequences to the next predetermined view. A sequencing monitor may be stopped at a particular view for further analysis.
Experience has shown that in the field of video surveillance that the most efficient number of video monitors is four to six. If more than six monitors are provided it has been shown that the operator may become visually overloaded and be incapable of accurately viewing all that transpires on the monitor screens. Therefore, the general practice in the industry is to reduce the number of display monitors. As a result, video output signals from the plurality of camera are viewed on a limited number of monitors.
Research has determined that approximately 99% of the time that the surveillance system is being monitored, nothing is happening. It is only 1% of the time that something of interest is taking place. What frequently happens in that crucial 1% of viewing is that the operator has a tendency to become confused about the proper opera-tion of the surveillance system. Additionally, it may notbe clear to an operator where a particular problem area, viewed on a monitor, is physically located.
Operators with little experience find it particularly difficult to operate the prior art's complicated control A-495~8/SCS/SJA1 -2-202~033 console in times of substantial duress. It is desirous, therefore, to reduce the confusion and resulting reaction time delays.
OBJECTS AND SUMMARY OF THE INVENTION
Accordingly, it is the object of the present invention to provide a closed circuit television network having a user friendly interface between the user and the network which enables the user to accurately operate the network in times of ~uress.
The graphics user interface clearly displays where the active cameras are located in the system, and what targets they are currently pointing at. This same interface display allows the operator to easily select new cameras and their respective views.
It is still another object of the present invention to provide a closed circuit television network having a computer control apparatus for providing video camera and monitor selection functions, alleviating the user from making these decisions, and thereby reducing the effects of panic and duress known to accompany emergency situations.
The attainment of these and related objects is made possible by the camera selection and positioning system and method herein disclosed. A camera selection and position-ing system and method according to the present invention has a plurality of video cameras producing video signals, a plurality of video display monitors and a video switcher apparatus coupled therebetween, including control apparatus coupled to the video switcher apparatus for controlling which video signals are displayed on each of the plurality of video display monitors. Also provided are a graphics user interface apparatus coupled to the control apparatus for permitting a user to operate the control apparatus, thereby permitting the user to control which video signals are displayed on the plurality of video display monitors.
A-49548/SCS/SJAl -3-2020~3~
BRIEF DESCRIPTION OF THE DRAWINGS
Fi~ure 1 is a block diagram of the closed circuit television network of the preferred embodiment.
Figure 2 is an illustration of the graphics user interface of the preferred embodiment.
Figure 3 is a state table illustrating the various modes of operation of the preferred embodiment.
Figure 4 is a block diagram of the computer software operating within the preferred embodiment.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to Figure 1, a block diagram of the closed circuit television network 10 of the preferred embodiment is shown. A substantial part of the preferred embodiment lies in the use of a processor 20. The processor provides a "thinking" capability which permits the network 10 to operate in any of a number of states, based on a plurality of inputs. The processor 20 is capable of making decisions quicker than a human operator. The processor 20 makes decisions more efficiently because it is not affected by duress or excitement, phenomena which commonly cause operator error in humans.
A primary aspect of the preferred embodiment is the use of a graphics user interface screen 30 between the user and the processor 20. Referring to Figure 2, the interface screen 30 is designed to provide a graphical representation (similar to a "map") of the area that a user chooses to view. Depending on what mode the network is operating in, the user can simply point to a specific area on the "map" and the processor 20 will determine which camera has the best view of that specific area and select that view to be displayed on one of the monitors. There-fore, instead of having to deal with switches, buttons and knobs, the user merely has to point to an area on the touch screen 30 to have a view of the area displayed. This arrangement significant reduces the amount of time neces-sary to locate and track a particular scene because only minimal thought process is required. The user simply points to the desired area on the screen. That area is instantaneously displayed on a screen. Alternately, the operator may "point" with a "mouse" (44 of Figure 1) rather than using the touch sensitive screen. The network actually operates in a plurality of modes which provide great flexibility to the user in deciding how best to meet the user's monitoring needs (these modes are described in more detail below).
Referring again to Figure 1, four video monitoring screens are provided 22, 24, 26 and 28. These video monitors 22, 24, 26 and 28 are standard video monitors and may be color or black and white. The video monitors 22, 24, 26 and 28 are connected to a video switcher 32. Also connected to the video switcher 32 are input lines from a plurality of remote cameras 34 and 36. In an actual network there may be over 100 cameras, therefore, remote cameras 34 and 36 are presented merely as representative of cameras that may be used in the network 10. The network 10 is not to be limited in the number of remote cameras that it has and, in general, the remote cameras in a network will greatly outnumber the monitors.
Remote camera controllers (RCC) 80 and 82 are con-nected to the remote cameras 34 and 36, respectively. The RCCs 80 and 82 provide information to the processor 20 camera position, field of view, and tilt or zoom, if applicable. The RCCs are communicated with, or polled, on a rapid and frequent basis. Position information from these cameras is encoded at the pan and tilt motor drive, typically using potentiometers as encoders. The potenti-ometer are used to develop a voltage proportional to the camera's position. This voltage is converted into a digital equivalent and reported by the RCC back to the processor 20 for display on the graphics display screen 30.
The result is that the camera icon on the graphics screen A-4~548/SCS/SJAl -5-accurately reflects the real-time status of the remote camera 34 and/or 36.
Camera position changes are generated by touching the graphics display 30, or PTZ control 42, and are communi-cated by the processor 20 to the remote RCC 80 and 82. The RCCs store the new position information and start the respective motors to effect the new position desired.
When the encoded position information matches the newly requested position, the control motors are shut off. The camera icon on the graphics display tracks the remote camera as it moves to the new location.
The function of the switcher 32 is to effectively display video signals from reflected ones of the plurality of cameras 34 and 36. The premise behind the operation of the switcher is that it is inefficient to display all the remote camera video signals at once. Cameras then selected for viewing in several ways: as an automatic response to an external alarm, as a result of a manual input by the operator, and as part of a preset sequencing of camera views on a particular monitor. The switcher is always under the control of processor 20. A suitable video switcher is the matrix 44 produced by Vicon Industries, Inc. of Melville, New York.
The processor 20 which is coupled to the switcher 32 is typically a standard 16 ~it industrialized personal microcomputer. These computers are capable of being rack mounted in control consoles. In addition, they have heavy duty power supplies and good filtering systems permitting twenty-four hour a day operation. Processor 20 monitoring circuitry is included that supervises proper processor operation and causes a re-boot if errors are detected. As will be discussed below with reference to Figure 3, the processor 20 permits the network lQ to operate in a plurality of modes.
A-~9548/SCS/SJAl -6-The processor 20 is controlled by the user through the graphics interface screen (Figure 2). The screen 30 is typically a high resolution color ~RT with a touch sensi-tive overlay. A touch screen is used for the preferred embodiment because it permits direct user interaction, i.e., all the operator has to do is point and touch.
Alternately, however, a personal computer "mouse" could also be used to designate a specific portion on the screen.
The processor 20 also receives input from an external alarm system 40. The external alarm system includes a plurality of sensors distributed throughout the area that the network 10 is securing. The sensors may be motion detectors, or pressure sensors located in floors, or fence disturbance sensors, etc. When one of the sensors is activated a signal identifying the sensor is sent to the processor 20. The processor 20 acts on this signal to select the closest camera to the sensed area to view the sensed area and switches the selected camera's output video signal to a monitor 22, 24, 26 or 28. When the sensed area is displayed on the monitor, the screen 30 graphically illustrates which camera is being used and what monitor the camera is being viewed on.
The software for the external alarm 40 is a standard driver routine. It addresses the serial port on the processor 20. The external alarm sends a digital message to the processor 20, indicating the zone where the alarm has been tripped. It also sends a status signal, ie., whether the zone has been acknowledged or not. An unac-knowledged zone may be shown on monitor 30 as a flashing object, or one colored red, or an object designated by a particular shape.
An additional feature which may be connected to processor 20 is the pan-tilt-zoom (hereinafter "PTZ") control mechanism 42. The PTZ mechanism 42 permits a user, once a particular PTZ camera has been selected through the screen 30, to control the PTZ of that camera using a joystick or keypad control. In such an arrangement, the user is offered another dimension of flexibility in viewing a particular scene.
Referring to Figure 2, a graphical representation of the screen 30 is shown. The representation is comprised primarily of a "map" segment (hereinafter "map" 50) and four icons or windows 52, 54, 56 and 58. The windows 52, 54, 56 and 58 have labels that identify particular moni-tors. The first window 52 (from the left) designates which camera, if any, is being displayed on monitor one 22, the second window designates which camera, if any, is being displayed on the second monitor 24, and so on for windows 56 and 58. If no camera is being displayed in a particular monitor 22, 24, 26 or 28 the window is blank or says "off."
The map segment 50 displays a graphical representation of real estate or an object that is being secured. The map 50 is stored in the memory of the processor 20. Different maps 50 may be called out of memory as desired. In a typical situation an entire floor plan of a building may be recalled from the processor memory. The user can designate any room, hallway or stairwell, etc., that the user would like to view and the processor 20 automatically calls the specific individual map 50 for that area. The specified area map is then displayed on the screen 30. From the displayed map 50 the user can designate the area he or she wants to monitor, and even the camera and monitor to be used, if so desired.
For instance, if the user wanted to ~iew the asset 60 (Figure 2), the user would touch the representation of asset 60 on the touch screen 30. The map 50 (of room 35, building 3A), has a coordinate pattern that corresponds to areas of the touch screen 30 when it is touched. When the user touches the asset 60, the closest camera 62 to the asset is switched to an available monitor. The wedge 64 indicates the field of ~iew of the camera 62 and if it is not already pointed at the asset, it will start to rotate A-49548/SCS/SJAl -8-2020~33 towards it tracking the movement of the camera. The display wedge width and length is proportional to the zoom and focus of the lens, respectively. Viewing the field at view 64, the user knows camera 62 (camera 3) is viewing the asset 60 because the field of view of the camera 62 is focused on the asset 60. By looking to the upper left hand corner of the screen 30 the user also knows that the field of view of the camera 62 (camera 3) is being displayed on monitor one 22. This is because the window 52 that indicates which camera is being displayed on monitor one 22 indicates that camera 3 (reference numeral 62) is being displayed thereon.
Similarly, if the user wishes to view an area herein called process 64, the user simply touches the graphic representation of the process 64. The closest camera 66 (camera 24) automatically begins monitoring the process 64.
By looking at the windows 52, 54, 56 and 58 the user sees the "24" in window 54. The "24" in window 54 indicates that the field of view 68 of camera "24" (reference numeral 66) is being displayed on the second monitor 24. The camera field of view icon wedge 68 will change shape and/or direction if the user performs any manual PTZ functions at the console. In actual use, the user will be directed to the correct monitor because when the user touches an area on the display screen, the next new image to appear on a monitor will be the selected image. Thus, the changed monitor will serve to alert the operator.
Also shown in the map 50 are a safe 70 and a camera 72 (camera number 32). At present camera 72 is turned off.
There~ore, no field of view is indicated. Should the user desire to view the safe all he or she need do is touch the graphic representation of the safe 70. The camera 72, which is the only camera capa~le of viewing the safe 70 because of the wall 74 is then activated and placed on an available monitor. A field of view wedge would then be seen (graphically represented) on the screen 30.
A-49548/SCS/SJA~ -9-2020~33 The graphics representation of field of view defined by the wedges 64 and 68 is created from feedback signals received from the RCC 80 and 82. The data includes whether the video unit is on or off, point of focus, degree of zoom, position of pan and tilt platform, etc. The feedback units 80 and 82 contain a multichannel A to D converter, serial communications port and single chip microprocessor with associated non-volatile memory. A power supply converts available power (low voltage AC) to that required by the RCC circuitry.
Function keys fl-f8 90 are provided along the lower portion of the screen 30. The function keys 70 are "soft keys" and can be programmed to do a plurality of tasks when touched. They are analogous to the function keys of a keyboard. The function keys 90 may be programmed to accomplish such tasks as turning on a camera heater, activating PTZ capabilities, turning on a light, moving the screen to the next map in a certain direction, calling a "help" menu, etc.
Having discussed the physical aspect of the preferred embodiment, a discussion of the various functions provided by those physical aspects is now presented with reference to the above. Referring to Figure 3, the closed circuit television network of the preferred embodiment can operate is a plurality of modes. Computer software resident in the processor 20 (as described below) is used to perform the functions provided by the various modes. Standard real-time programming techniques are used for both the processor and RCC software. A software flowchart indicative of the requisite programming steps is presented in Figure 4. The flowchart 90 demonstrates how various user touch sequences control the display system. These sequences are classified as "modes" in Figure 3 which is described immediately below.
Referring to Figure 3, a pseudo state table 80 of the modes 1-8 of the preferred embodiment is presented. Mode 1 A-49548/SCS/SJAl -lO-2020~33 is the full automatic mode. The explanation of mode 1 (and all other modes) is best made with reference to both Figure 2 and Figure 3. Operation in the full automatic mode is similar to that described above with reference to Figure 2. The only necessary input is that of the view desired to be displayed. On the portion of the screen 30 indicative of the view desired to be displayed is touched, the processor 20 selects and pans the closest remote camera to the selected area. The processor 20 then selects the next available monitor automatically and displays the desired view on that monitor.
The camera selection is determined by an algorithm that first identifies which camera or cameras can "see" the desired area. These camera views are immediately routed to available video monitors. Feedback from the RCC indicate the position of the camera and extent of focus. This information is used by the processor to determine the field of view of the camera with respect to the map display. The processor then creates an image of the active camera's field of view on the screen 30. At the same time, the proper focal length is determined by processor 20 and the focus information is sent to the camera lens. Zoom information is calculated to present a constant view height and width independent of the distance to the new target.
In regard to which monitor the image is displayed on, a priority scheme is utilized. When all monitors are active and a particular monitor is not designated, the monitor with the lowest priority camera image will be connected to the new and higher priority camera image.
External alarms may also be prioritized for monitor display with overflow status indicated on the graphics control screen. Views holding in overflow are automatically routed to a monitor when it becomes available, i.e., is manually cleared.
Mode 2 is a semi-automatic mode. It is termed semi-automatic because it requires two inputs. One input to A-49548/SCS/SJAl -11-202093~
specify the view desired to be displayed and the other to select the camera to be used to view the desired area.
Basically, mode 2 gives the user the option of selecting which camera is used to view a specific area, instead of having the processor make that selection automatically. In mode 2, the processor 20 pans the remote camera selected by the user to the selected area. The processor 20 also selects the next available monitor and automatically displays the view thereon. For example, in Figure 2, the user may wish to view the back side of the asset 60. In that instance, the user would select a view of the asset by touching the asset 60 and then touch camera 66 (camera 24). Similarly, if the user wanted to view the back side on the process 64, the camera 62 (camera number 3) could be selected in this mode to view the process ~4.
Mode 3 is also a semi-automatic mode. In mode 3, however, the two inputs from the user are the area desired to be displayed and the monitor on which to display the desired area. A monitor is selected by touching the desires monitor window, be it window 52, 54, 56 or 58. In mode 3, the processor 20 selects and pans the closest remote camera to the selected area. The processor 20 also displays the image on the selected monitor.
Mode 4 is a manual mode. It is a manual mode because the user selects the desired view, the camera to be usPd to capture the desired view and the monitor on which the view is to be displayed. Thus, the decisions which may alterna-tively be conducted by the processor 20 in the full automatic mode are made by the user. In mode 4, the user selects the monitor, the area to be viewed and the camera to be used, by indicating these items on the screen 30.
The processor acts on these inputs to position the selected camera to Yiew the selected area and automatically displays that view on the selected monitor.
Mode 5 is the sequencing monitor freeze mode. As mentioned above, to provide input from a relatively large A-49548/SCS/SJAl -12-number of remote cameras on to one (or some other small number of monitors) a procedure called sequencing is used.
For instance, a plurality of remote camera video output signals may be displayed sequentially on one monitor, one at a time, for a period of five or ten seconds each.
Occasionally, the user will see something in one of the sequences that the user wishes to examine further. In mode 5, the user is able to stop the sequencing at the scene the user wishes to further investigate. The sequence is stopped by the user simply by touching the window corres-ponding to the monitor the user wishes to observe.
Touching the appropriate window again restarts the sequenc-ing procedure.
Mode 6 permits the user to clear a monitor. A primary reason for clearing monitors is to enable the user to focus on the other monitors without being distracted by extrane-ous views. Mode 6 operates in the static view format (non-sequencing). In mode 6, a monitor in static view format will be cleared when the window corresponding to the par-ticular monitor is touched.
Mode 7 is the camera select mode. The user specifiesthe camera to be used by touching the camera icon. Once specified the user can pan, tilt, focus and zoom the selected camera to the extent available. The PTZ functions are controlled with touch screen inputs or with the optional PTZ control device 42 referenced in Figure 1.
Mode 8 is similar to mode 7, except that mode 8 allows the user to also select the monitor on which to display the camera view.
Referring to Figure 4, an overview of the software necessary to invoke the touch control operation of the preferred embodiment is presented. It is presented by way of a diagrammatical flowchart In step 100, the software waits for a touch on the screen. A touch, once received is echoed by a starburst or a "+" to indicate actual location of the touch. In step 102 the type of touch input is classified. The classification can be broken down into five types. The first, in step 104, is when a function key of button (70 of Figure 2) is touched. In that case the function is performed (step 106) and the program returns to step 100, waiting for another screen input.
Figure 4 is set up to work from left to right, begin-ning at step 108 and moving to step 124 and step 138.
Steps 108, 124 and 138 correlate to the icon monitor touch columns for monitor, camera and view, respectively, in Figure 3. If view is touched first the system 10 knows it is in mode 1. If a camera icons is touched first, the system 10 is either in modes 2 or 7. If a view area is touched after a camera icon is designated, then the system is in mode 2.
If a monitor is touched first, the system is either in mode 3, 4, 5, 6 or 8. If only a monitor icon is touched (step 108) the system is in mode 5 or 6, the determination of which one of these modes is made in step 110. If only a monitor (step 108) and a camera (step 124) are designated then the mode 8 is entered. If only a monitor (step 108) and a view (step 138) are entered then the program is in mode 3. If the monitor, camera and view icons are touched (steps 108, 124 and 138), in that order, then the program enters the manual mode, mode 4.
Continuing with a step-by-step description of Figure 4, a second type of touch classification is the monitor icon (step 108). When it is designated, a first inquiry is whether a preset video sequence is currently being displayed on the monitor that is designated (step 110). If the answer to this inquiry is "yes" a second inquiry need take place. In step 112, a determination is made of whether the video sequence is currently sequencing. If sequencing, then the sequence is frozen on the display from the particular monitor (step 114). Alternatively, in step 112, if it is determined (within sequence mode) that a A-49548/SCS/SJAl -14-202~33 sequence is not currently running, the sequence is re-started, switching the monitor to the next video input signal in the sequence (step 116).
If in step 110, a determination is made that the sequencing mode is not enabled, the particular monitor is cleared (step 118). Next, the monitor icon for that monitor is highlighted to make the indication of its inactive state readily noticeable to the user (step 120).
In step 122, the monitor timer is enabled. The program then returns to step 100. Each monitor has a timeout function. The timeout function clears the camera after a certain time period. For example, the timeout may be set for one minute so that after the image has been displayed and viewed the monitor is automatically cleared so that it is available for other uses. After the monitor timer is enabled the program returns to step 100.
If a camera icon is touched in step 102, the program flows to step 124, detecting that a camera icon has indeed been touched. A first inquiry, step 126, is whether a monitor timeout has occurred. If it has not, a monitor is enabled (step 128). The monitor timer is then reset (step 130). If a timeout has occurred in step 126, then the software automatically selects a monitor that displays the image from a selected 20 camera, (step 132). In step 134, a start camera timer is enabled. In step 136, the video for that camera is enabled. Also in step 136, PTZ control for the camera is enabled, if applicable.
If in step 102 a l'valid" area (one that is physically located within a screen map) is touched, the program goes to step 138 to begin the subroutine for the valid area mode. In step 140, a determination is made as to whether a monitor timeout has occurred. If it has not, a monitor is enabled (step 142) and the monitor timer is reset (step 144). If a monitor has timed out, that monitor is selected to view the video signal of the touched area (step 146).
Steps 140-146 are analogous to steps 126-132.
A-49548/SCS/SJAl -15-2G20~3 In step 148, a determination is made as to whether a camera has been selected. If one has, the program proceeds directly to step 156; if not, it proceeds to step 150. In step 150, the camera selection process takes place. A
determination is made of whether there is more than one camera (152) that can view the selected area. If there are not, then the video output signal from the one available camera is used and the program goes directly to step 156.
If there is more than one camera, then the additional cameras are displayed on available monitors. In step 156, the applicable video cameras are enabled, as well as their output signals. PZT components are similarly enabled in this step if they are available. The program then returns to step 100.
Moving to step 158, if an invalid area is touched (outside the map, monitors or function buttons) a recogni-tion is made of same. In step 160, a beeper is sounded indicating the touching of an "invalid" area. The program then returns to step 100.
It should further be apparent to those skilled in the art that various changes in form and details of the invention as shown and described nay be made. It is intended that such changes be included within the spirit and scope of the claims appended hereto.
A-49548/SCS/SJAl -16-
BACKGROUND OF THE INVENTION
Field of the Invention. The present invention relates to control systems for closed circuit television observa-tion systems. More specifically, the present invention relates to a closed circuit television observation system controlled by a computer and accessed by a graphic user interface.
Summary of the Prior Art. For quite some time now, closed circuit video cameras have been used as monitors.
They have been used for security purposes and also for observation purposes, i.e., hospitals, etc. The primary use, however, has been for security. For example, prisons, military bases and private real estate, etc. use closed circuit television networks to provide security.
Often the closed circuit security setup includes a plurality of video cameras, a plurality of video monitors, a video switching unit and some type of mechanical inter-face which allows the user to determine which video camera output signals are going to be displayed on the monitors.
The user can physically select which of the cameras the user wants to appear on a particular monitor. Thus, the user will have perhaps 50 or 100 cameras and will be able to select which of the plurality of cameras he wishes to display on the monitor(s). The user effects the A-~9548/SCS/SJAl -l-selection of cameras to view on the monitor(s) by flicking switches or pushing buttons located on the monitoring console.
The video switcher may be interfaced to an external alarm system and an alarm event may then cause a prede-termined camera and view to be selected and displayed. It is not always clear to the user, where the source of video is coming from when the video is switched automatically.
Typically any one of the monitors may be setup to display a user selected sequence of camera views. Each view is held for a matter of seconds and then sequences to the next predetermined view. A sequencing monitor may be stopped at a particular view for further analysis.
Experience has shown that in the field of video surveillance that the most efficient number of video monitors is four to six. If more than six monitors are provided it has been shown that the operator may become visually overloaded and be incapable of accurately viewing all that transpires on the monitor screens. Therefore, the general practice in the industry is to reduce the number of display monitors. As a result, video output signals from the plurality of camera are viewed on a limited number of monitors.
Research has determined that approximately 99% of the time that the surveillance system is being monitored, nothing is happening. It is only 1% of the time that something of interest is taking place. What frequently happens in that crucial 1% of viewing is that the operator has a tendency to become confused about the proper opera-tion of the surveillance system. Additionally, it may notbe clear to an operator where a particular problem area, viewed on a monitor, is physically located.
Operators with little experience find it particularly difficult to operate the prior art's complicated control A-495~8/SCS/SJA1 -2-202~033 console in times of substantial duress. It is desirous, therefore, to reduce the confusion and resulting reaction time delays.
OBJECTS AND SUMMARY OF THE INVENTION
Accordingly, it is the object of the present invention to provide a closed circuit television network having a user friendly interface between the user and the network which enables the user to accurately operate the network in times of ~uress.
The graphics user interface clearly displays where the active cameras are located in the system, and what targets they are currently pointing at. This same interface display allows the operator to easily select new cameras and their respective views.
It is still another object of the present invention to provide a closed circuit television network having a computer control apparatus for providing video camera and monitor selection functions, alleviating the user from making these decisions, and thereby reducing the effects of panic and duress known to accompany emergency situations.
The attainment of these and related objects is made possible by the camera selection and positioning system and method herein disclosed. A camera selection and position-ing system and method according to the present invention has a plurality of video cameras producing video signals, a plurality of video display monitors and a video switcher apparatus coupled therebetween, including control apparatus coupled to the video switcher apparatus for controlling which video signals are displayed on each of the plurality of video display monitors. Also provided are a graphics user interface apparatus coupled to the control apparatus for permitting a user to operate the control apparatus, thereby permitting the user to control which video signals are displayed on the plurality of video display monitors.
A-49548/SCS/SJAl -3-2020~3~
BRIEF DESCRIPTION OF THE DRAWINGS
Fi~ure 1 is a block diagram of the closed circuit television network of the preferred embodiment.
Figure 2 is an illustration of the graphics user interface of the preferred embodiment.
Figure 3 is a state table illustrating the various modes of operation of the preferred embodiment.
Figure 4 is a block diagram of the computer software operating within the preferred embodiment.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to Figure 1, a block diagram of the closed circuit television network 10 of the preferred embodiment is shown. A substantial part of the preferred embodiment lies in the use of a processor 20. The processor provides a "thinking" capability which permits the network 10 to operate in any of a number of states, based on a plurality of inputs. The processor 20 is capable of making decisions quicker than a human operator. The processor 20 makes decisions more efficiently because it is not affected by duress or excitement, phenomena which commonly cause operator error in humans.
A primary aspect of the preferred embodiment is the use of a graphics user interface screen 30 between the user and the processor 20. Referring to Figure 2, the interface screen 30 is designed to provide a graphical representation (similar to a "map") of the area that a user chooses to view. Depending on what mode the network is operating in, the user can simply point to a specific area on the "map" and the processor 20 will determine which camera has the best view of that specific area and select that view to be displayed on one of the monitors. There-fore, instead of having to deal with switches, buttons and knobs, the user merely has to point to an area on the touch screen 30 to have a view of the area displayed. This arrangement significant reduces the amount of time neces-sary to locate and track a particular scene because only minimal thought process is required. The user simply points to the desired area on the screen. That area is instantaneously displayed on a screen. Alternately, the operator may "point" with a "mouse" (44 of Figure 1) rather than using the touch sensitive screen. The network actually operates in a plurality of modes which provide great flexibility to the user in deciding how best to meet the user's monitoring needs (these modes are described in more detail below).
Referring again to Figure 1, four video monitoring screens are provided 22, 24, 26 and 28. These video monitors 22, 24, 26 and 28 are standard video monitors and may be color or black and white. The video monitors 22, 24, 26 and 28 are connected to a video switcher 32. Also connected to the video switcher 32 are input lines from a plurality of remote cameras 34 and 36. In an actual network there may be over 100 cameras, therefore, remote cameras 34 and 36 are presented merely as representative of cameras that may be used in the network 10. The network 10 is not to be limited in the number of remote cameras that it has and, in general, the remote cameras in a network will greatly outnumber the monitors.
Remote camera controllers (RCC) 80 and 82 are con-nected to the remote cameras 34 and 36, respectively. The RCCs 80 and 82 provide information to the processor 20 camera position, field of view, and tilt or zoom, if applicable. The RCCs are communicated with, or polled, on a rapid and frequent basis. Position information from these cameras is encoded at the pan and tilt motor drive, typically using potentiometers as encoders. The potenti-ometer are used to develop a voltage proportional to the camera's position. This voltage is converted into a digital equivalent and reported by the RCC back to the processor 20 for display on the graphics display screen 30.
The result is that the camera icon on the graphics screen A-4~548/SCS/SJAl -5-accurately reflects the real-time status of the remote camera 34 and/or 36.
Camera position changes are generated by touching the graphics display 30, or PTZ control 42, and are communi-cated by the processor 20 to the remote RCC 80 and 82. The RCCs store the new position information and start the respective motors to effect the new position desired.
When the encoded position information matches the newly requested position, the control motors are shut off. The camera icon on the graphics display tracks the remote camera as it moves to the new location.
The function of the switcher 32 is to effectively display video signals from reflected ones of the plurality of cameras 34 and 36. The premise behind the operation of the switcher is that it is inefficient to display all the remote camera video signals at once. Cameras then selected for viewing in several ways: as an automatic response to an external alarm, as a result of a manual input by the operator, and as part of a preset sequencing of camera views on a particular monitor. The switcher is always under the control of processor 20. A suitable video switcher is the matrix 44 produced by Vicon Industries, Inc. of Melville, New York.
The processor 20 which is coupled to the switcher 32 is typically a standard 16 ~it industrialized personal microcomputer. These computers are capable of being rack mounted in control consoles. In addition, they have heavy duty power supplies and good filtering systems permitting twenty-four hour a day operation. Processor 20 monitoring circuitry is included that supervises proper processor operation and causes a re-boot if errors are detected. As will be discussed below with reference to Figure 3, the processor 20 permits the network lQ to operate in a plurality of modes.
A-~9548/SCS/SJAl -6-The processor 20 is controlled by the user through the graphics interface screen (Figure 2). The screen 30 is typically a high resolution color ~RT with a touch sensi-tive overlay. A touch screen is used for the preferred embodiment because it permits direct user interaction, i.e., all the operator has to do is point and touch.
Alternately, however, a personal computer "mouse" could also be used to designate a specific portion on the screen.
The processor 20 also receives input from an external alarm system 40. The external alarm system includes a plurality of sensors distributed throughout the area that the network 10 is securing. The sensors may be motion detectors, or pressure sensors located in floors, or fence disturbance sensors, etc. When one of the sensors is activated a signal identifying the sensor is sent to the processor 20. The processor 20 acts on this signal to select the closest camera to the sensed area to view the sensed area and switches the selected camera's output video signal to a monitor 22, 24, 26 or 28. When the sensed area is displayed on the monitor, the screen 30 graphically illustrates which camera is being used and what monitor the camera is being viewed on.
The software for the external alarm 40 is a standard driver routine. It addresses the serial port on the processor 20. The external alarm sends a digital message to the processor 20, indicating the zone where the alarm has been tripped. It also sends a status signal, ie., whether the zone has been acknowledged or not. An unac-knowledged zone may be shown on monitor 30 as a flashing object, or one colored red, or an object designated by a particular shape.
An additional feature which may be connected to processor 20 is the pan-tilt-zoom (hereinafter "PTZ") control mechanism 42. The PTZ mechanism 42 permits a user, once a particular PTZ camera has been selected through the screen 30, to control the PTZ of that camera using a joystick or keypad control. In such an arrangement, the user is offered another dimension of flexibility in viewing a particular scene.
Referring to Figure 2, a graphical representation of the screen 30 is shown. The representation is comprised primarily of a "map" segment (hereinafter "map" 50) and four icons or windows 52, 54, 56 and 58. The windows 52, 54, 56 and 58 have labels that identify particular moni-tors. The first window 52 (from the left) designates which camera, if any, is being displayed on monitor one 22, the second window designates which camera, if any, is being displayed on the second monitor 24, and so on for windows 56 and 58. If no camera is being displayed in a particular monitor 22, 24, 26 or 28 the window is blank or says "off."
The map segment 50 displays a graphical representation of real estate or an object that is being secured. The map 50 is stored in the memory of the processor 20. Different maps 50 may be called out of memory as desired. In a typical situation an entire floor plan of a building may be recalled from the processor memory. The user can designate any room, hallway or stairwell, etc., that the user would like to view and the processor 20 automatically calls the specific individual map 50 for that area. The specified area map is then displayed on the screen 30. From the displayed map 50 the user can designate the area he or she wants to monitor, and even the camera and monitor to be used, if so desired.
For instance, if the user wanted to ~iew the asset 60 (Figure 2), the user would touch the representation of asset 60 on the touch screen 30. The map 50 (of room 35, building 3A), has a coordinate pattern that corresponds to areas of the touch screen 30 when it is touched. When the user touches the asset 60, the closest camera 62 to the asset is switched to an available monitor. The wedge 64 indicates the field of ~iew of the camera 62 and if it is not already pointed at the asset, it will start to rotate A-49548/SCS/SJAl -8-2020~33 towards it tracking the movement of the camera. The display wedge width and length is proportional to the zoom and focus of the lens, respectively. Viewing the field at view 64, the user knows camera 62 (camera 3) is viewing the asset 60 because the field of view of the camera 62 is focused on the asset 60. By looking to the upper left hand corner of the screen 30 the user also knows that the field of view of the camera 62 (camera 3) is being displayed on monitor one 22. This is because the window 52 that indicates which camera is being displayed on monitor one 22 indicates that camera 3 (reference numeral 62) is being displayed thereon.
Similarly, if the user wishes to view an area herein called process 64, the user simply touches the graphic representation of the process 64. The closest camera 66 (camera 24) automatically begins monitoring the process 64.
By looking at the windows 52, 54, 56 and 58 the user sees the "24" in window 54. The "24" in window 54 indicates that the field of view 68 of camera "24" (reference numeral 66) is being displayed on the second monitor 24. The camera field of view icon wedge 68 will change shape and/or direction if the user performs any manual PTZ functions at the console. In actual use, the user will be directed to the correct monitor because when the user touches an area on the display screen, the next new image to appear on a monitor will be the selected image. Thus, the changed monitor will serve to alert the operator.
Also shown in the map 50 are a safe 70 and a camera 72 (camera number 32). At present camera 72 is turned off.
There~ore, no field of view is indicated. Should the user desire to view the safe all he or she need do is touch the graphic representation of the safe 70. The camera 72, which is the only camera capa~le of viewing the safe 70 because of the wall 74 is then activated and placed on an available monitor. A field of view wedge would then be seen (graphically represented) on the screen 30.
A-49548/SCS/SJA~ -9-2020~33 The graphics representation of field of view defined by the wedges 64 and 68 is created from feedback signals received from the RCC 80 and 82. The data includes whether the video unit is on or off, point of focus, degree of zoom, position of pan and tilt platform, etc. The feedback units 80 and 82 contain a multichannel A to D converter, serial communications port and single chip microprocessor with associated non-volatile memory. A power supply converts available power (low voltage AC) to that required by the RCC circuitry.
Function keys fl-f8 90 are provided along the lower portion of the screen 30. The function keys 70 are "soft keys" and can be programmed to do a plurality of tasks when touched. They are analogous to the function keys of a keyboard. The function keys 90 may be programmed to accomplish such tasks as turning on a camera heater, activating PTZ capabilities, turning on a light, moving the screen to the next map in a certain direction, calling a "help" menu, etc.
Having discussed the physical aspect of the preferred embodiment, a discussion of the various functions provided by those physical aspects is now presented with reference to the above. Referring to Figure 3, the closed circuit television network of the preferred embodiment can operate is a plurality of modes. Computer software resident in the processor 20 (as described below) is used to perform the functions provided by the various modes. Standard real-time programming techniques are used for both the processor and RCC software. A software flowchart indicative of the requisite programming steps is presented in Figure 4. The flowchart 90 demonstrates how various user touch sequences control the display system. These sequences are classified as "modes" in Figure 3 which is described immediately below.
Referring to Figure 3, a pseudo state table 80 of the modes 1-8 of the preferred embodiment is presented. Mode 1 A-49548/SCS/SJAl -lO-2020~33 is the full automatic mode. The explanation of mode 1 (and all other modes) is best made with reference to both Figure 2 and Figure 3. Operation in the full automatic mode is similar to that described above with reference to Figure 2. The only necessary input is that of the view desired to be displayed. On the portion of the screen 30 indicative of the view desired to be displayed is touched, the processor 20 selects and pans the closest remote camera to the selected area. The processor 20 then selects the next available monitor automatically and displays the desired view on that monitor.
The camera selection is determined by an algorithm that first identifies which camera or cameras can "see" the desired area. These camera views are immediately routed to available video monitors. Feedback from the RCC indicate the position of the camera and extent of focus. This information is used by the processor to determine the field of view of the camera with respect to the map display. The processor then creates an image of the active camera's field of view on the screen 30. At the same time, the proper focal length is determined by processor 20 and the focus information is sent to the camera lens. Zoom information is calculated to present a constant view height and width independent of the distance to the new target.
In regard to which monitor the image is displayed on, a priority scheme is utilized. When all monitors are active and a particular monitor is not designated, the monitor with the lowest priority camera image will be connected to the new and higher priority camera image.
External alarms may also be prioritized for monitor display with overflow status indicated on the graphics control screen. Views holding in overflow are automatically routed to a monitor when it becomes available, i.e., is manually cleared.
Mode 2 is a semi-automatic mode. It is termed semi-automatic because it requires two inputs. One input to A-49548/SCS/SJAl -11-202093~
specify the view desired to be displayed and the other to select the camera to be used to view the desired area.
Basically, mode 2 gives the user the option of selecting which camera is used to view a specific area, instead of having the processor make that selection automatically. In mode 2, the processor 20 pans the remote camera selected by the user to the selected area. The processor 20 also selects the next available monitor and automatically displays the view thereon. For example, in Figure 2, the user may wish to view the back side of the asset 60. In that instance, the user would select a view of the asset by touching the asset 60 and then touch camera 66 (camera 24). Similarly, if the user wanted to view the back side on the process 64, the camera 62 (camera number 3) could be selected in this mode to view the process ~4.
Mode 3 is also a semi-automatic mode. In mode 3, however, the two inputs from the user are the area desired to be displayed and the monitor on which to display the desired area. A monitor is selected by touching the desires monitor window, be it window 52, 54, 56 or 58. In mode 3, the processor 20 selects and pans the closest remote camera to the selected area. The processor 20 also displays the image on the selected monitor.
Mode 4 is a manual mode. It is a manual mode because the user selects the desired view, the camera to be usPd to capture the desired view and the monitor on which the view is to be displayed. Thus, the decisions which may alterna-tively be conducted by the processor 20 in the full automatic mode are made by the user. In mode 4, the user selects the monitor, the area to be viewed and the camera to be used, by indicating these items on the screen 30.
The processor acts on these inputs to position the selected camera to Yiew the selected area and automatically displays that view on the selected monitor.
Mode 5 is the sequencing monitor freeze mode. As mentioned above, to provide input from a relatively large A-49548/SCS/SJAl -12-number of remote cameras on to one (or some other small number of monitors) a procedure called sequencing is used.
For instance, a plurality of remote camera video output signals may be displayed sequentially on one monitor, one at a time, for a period of five or ten seconds each.
Occasionally, the user will see something in one of the sequences that the user wishes to examine further. In mode 5, the user is able to stop the sequencing at the scene the user wishes to further investigate. The sequence is stopped by the user simply by touching the window corres-ponding to the monitor the user wishes to observe.
Touching the appropriate window again restarts the sequenc-ing procedure.
Mode 6 permits the user to clear a monitor. A primary reason for clearing monitors is to enable the user to focus on the other monitors without being distracted by extrane-ous views. Mode 6 operates in the static view format (non-sequencing). In mode 6, a monitor in static view format will be cleared when the window corresponding to the par-ticular monitor is touched.
Mode 7 is the camera select mode. The user specifiesthe camera to be used by touching the camera icon. Once specified the user can pan, tilt, focus and zoom the selected camera to the extent available. The PTZ functions are controlled with touch screen inputs or with the optional PTZ control device 42 referenced in Figure 1.
Mode 8 is similar to mode 7, except that mode 8 allows the user to also select the monitor on which to display the camera view.
Referring to Figure 4, an overview of the software necessary to invoke the touch control operation of the preferred embodiment is presented. It is presented by way of a diagrammatical flowchart In step 100, the software waits for a touch on the screen. A touch, once received is echoed by a starburst or a "+" to indicate actual location of the touch. In step 102 the type of touch input is classified. The classification can be broken down into five types. The first, in step 104, is when a function key of button (70 of Figure 2) is touched. In that case the function is performed (step 106) and the program returns to step 100, waiting for another screen input.
Figure 4 is set up to work from left to right, begin-ning at step 108 and moving to step 124 and step 138.
Steps 108, 124 and 138 correlate to the icon monitor touch columns for monitor, camera and view, respectively, in Figure 3. If view is touched first the system 10 knows it is in mode 1. If a camera icons is touched first, the system 10 is either in modes 2 or 7. If a view area is touched after a camera icon is designated, then the system is in mode 2.
If a monitor is touched first, the system is either in mode 3, 4, 5, 6 or 8. If only a monitor icon is touched (step 108) the system is in mode 5 or 6, the determination of which one of these modes is made in step 110. If only a monitor (step 108) and a camera (step 124) are designated then the mode 8 is entered. If only a monitor (step 108) and a view (step 138) are entered then the program is in mode 3. If the monitor, camera and view icons are touched (steps 108, 124 and 138), in that order, then the program enters the manual mode, mode 4.
Continuing with a step-by-step description of Figure 4, a second type of touch classification is the monitor icon (step 108). When it is designated, a first inquiry is whether a preset video sequence is currently being displayed on the monitor that is designated (step 110). If the answer to this inquiry is "yes" a second inquiry need take place. In step 112, a determination is made of whether the video sequence is currently sequencing. If sequencing, then the sequence is frozen on the display from the particular monitor (step 114). Alternatively, in step 112, if it is determined (within sequence mode) that a A-49548/SCS/SJAl -14-202~33 sequence is not currently running, the sequence is re-started, switching the monitor to the next video input signal in the sequence (step 116).
If in step 110, a determination is made that the sequencing mode is not enabled, the particular monitor is cleared (step 118). Next, the monitor icon for that monitor is highlighted to make the indication of its inactive state readily noticeable to the user (step 120).
In step 122, the monitor timer is enabled. The program then returns to step 100. Each monitor has a timeout function. The timeout function clears the camera after a certain time period. For example, the timeout may be set for one minute so that after the image has been displayed and viewed the monitor is automatically cleared so that it is available for other uses. After the monitor timer is enabled the program returns to step 100.
If a camera icon is touched in step 102, the program flows to step 124, detecting that a camera icon has indeed been touched. A first inquiry, step 126, is whether a monitor timeout has occurred. If it has not, a monitor is enabled (step 128). The monitor timer is then reset (step 130). If a timeout has occurred in step 126, then the software automatically selects a monitor that displays the image from a selected 20 camera, (step 132). In step 134, a start camera timer is enabled. In step 136, the video for that camera is enabled. Also in step 136, PTZ control for the camera is enabled, if applicable.
If in step 102 a l'valid" area (one that is physically located within a screen map) is touched, the program goes to step 138 to begin the subroutine for the valid area mode. In step 140, a determination is made as to whether a monitor timeout has occurred. If it has not, a monitor is enabled (step 142) and the monitor timer is reset (step 144). If a monitor has timed out, that monitor is selected to view the video signal of the touched area (step 146).
Steps 140-146 are analogous to steps 126-132.
A-49548/SCS/SJAl -15-2G20~3 In step 148, a determination is made as to whether a camera has been selected. If one has, the program proceeds directly to step 156; if not, it proceeds to step 150. In step 150, the camera selection process takes place. A
determination is made of whether there is more than one camera (152) that can view the selected area. If there are not, then the video output signal from the one available camera is used and the program goes directly to step 156.
If there is more than one camera, then the additional cameras are displayed on available monitors. In step 156, the applicable video cameras are enabled, as well as their output signals. PZT components are similarly enabled in this step if they are available. The program then returns to step 100.
Moving to step 158, if an invalid area is touched (outside the map, monitors or function buttons) a recogni-tion is made of same. In step 160, a beeper is sounded indicating the touching of an "invalid" area. The program then returns to step 100.
It should further be apparent to those skilled in the art that various changes in form and details of the invention as shown and described nay be made. It is intended that such changes be included within the spirit and scope of the claims appended hereto.
A-49548/SCS/SJAl -16-
Claims (21)
1. A video camera system, comprising:
a plurality of video cameras which monitor correspond-ing portions of a physical area;
camera control means for controlling the orientation of specified ones of said video cameras;
a plurality of monitors;
video switch means for coupling selected ones of said video cameras to said monitors; and user interface means for generating a schematic graphical representation of at least a portion of said physical area and the position and orientation of at least one of said video cameras in said physical area.
a plurality of video cameras which monitor correspond-ing portions of a physical area;
camera control means for controlling the orientation of specified ones of said video cameras;
a plurality of monitors;
video switch means for coupling selected ones of said video cameras to said monitors; and user interface means for generating a schematic graphical representation of at least a portion of said physical area and the position and orientation of at least one of said video cameras in said physical area.
2. The video camera system of claim 1, comprising:
each of said video cameras having a field of view corresponding to the orientation of said video camera; and said user interface means including means for sche-matically representing the field of view of said video cameras.
each of said video cameras having a field of view corresponding to the orientation of said video camera; and said user interface means including means for sche-matically representing the field of view of said video cameras.
3. The video camera system of claim 2, comprising:
said user interface including means for visually denoting which ones of said video cameras are coupled to said monitors.
said user interface including means for visually denoting which ones of said video cameras are coupled to said monitors.
4. The video camera system of claim 3, comprising:
said video switch means having means, responsive to camera selection signals, for coupling a specified video camera to a specified one of said monitors; and said user interface means including input means, coupled to said video switch means, for responding when a user points to a portion of said schematic graphical representation corresponding to a location within said physical area by selecting the one of said video cameras best positioned for viewing said location and sending a corresponding camera selection signal to sald video switch means;
whereby a selected location is automatically displayed on one of said monitors.
said video switch means having means, responsive to camera selection signals, for coupling a specified video camera to a specified one of said monitors; and said user interface means including input means, coupled to said video switch means, for responding when a user points to a portion of said schematic graphical representation corresponding to a location within said physical area by selecting the one of said video cameras best positioned for viewing said location and sending a corresponding camera selection signal to sald video switch means;
whereby a selected location is automatically displayed on one of said monitors.
5. The video camera system of claim 3, comprising:
said video switch means having means, responsive to camera selection signals, for coupling a specified video camera to a specified one of said monitors;
said user interface means including means for enabling a user to specify a location within said physical area;
means for selecting one of said video cameras which is capable of viewing said specified location and one of said monitors on which to display said location; and means for sending a corresponding camera selection signal to said video switch means for coupling the selected video camera to the selected one of said monitors.
said video switch means having means, responsive to camera selection signals, for coupling a specified video camera to a specified one of said monitors;
said user interface means including means for enabling a user to specify a location within said physical area;
means for selecting one of said video cameras which is capable of viewing said specified location and one of said monitors on which to display said location; and means for sending a corresponding camera selection signal to said video switch means for coupling the selected video camera to the selected one of said monitors.
6. The video camera system of claim 3, comprising:
said video switch means having means, responsive to camera selection signals, for coupling a specified video camera to a specified one of said monitors;
said user interface means including means for graphi-cally representing said video cameras with video cameras icons;
said user interface means further including touch means, coupled to said video switch means, for selecting one of said video cameras when a user touches a correspond-ing one of said video camera icons, and generating a camera selection signal specifying said selected video camera;
whereby users can select video cameras for viewing by touching corresponding video camera icons.
said video switch means having means, responsive to camera selection signals, for coupling a specified video camera to a specified one of said monitors;
said user interface means including means for graphi-cally representing said video cameras with video cameras icons;
said user interface means further including touch means, coupled to said video switch means, for selecting one of said video cameras when a user touches a correspond-ing one of said video camera icons, and generating a camera selection signal specifying said selected video camera;
whereby users can select video cameras for viewing by touching corresponding video camera icons.
7. The video camera system of claim 4, wherein the user interface means further comprises a touch screen for enabling a user to point to portions of said schematic graphical representation.
8. The video camera system of claim 4, wherein the user interface means further comprises a mouse for enabling a user to point to portions of said schematic graphical representation.
9. In an apparatus for a closed circuit television network having a plurality of video cameras producing video signals, a plurality of video display monitors and a video switcher means coupled therebetween, and a processor means coupled to said video switcher means, the output of said processor means determining which of said video signals to display on said plurality of video display monitors based upon information signals, the improvement comprising:
graphics user interface means coupled to said proces-sor means for inputting information signals to said processor means for controlling the output of said proces-sor.
graphics user interface means coupled to said proces-sor means for inputting information signals to said processor means for controlling the output of said proces-sor.
10. An apparatus for closed circuit television networks having a plurality of remote cameras and monitors, comprising:
processor means for controlling a video switcher means based on input to the processor means of camera, monitor and view information; and a graphical user interface means having graphical representations of cameras, monitor and views connected to said processor means for entry of camera, monitor and view information to said processor means;
said processor means generating graphical representa-tions of views, cameras and monitors on said graphical user interface means, displaying video signals from at least one of said remote cameras on at least one of said monitors and indicating on the graphical user interface means the monitor on which the video signal is being displayed, the remote camera from which the video signal is emanating and the field of view of the remote camera being displayed.
processor means for controlling a video switcher means based on input to the processor means of camera, monitor and view information; and a graphical user interface means having graphical representations of cameras, monitor and views connected to said processor means for entry of camera, monitor and view information to said processor means;
said processor means generating graphical representa-tions of views, cameras and monitors on said graphical user interface means, displaying video signals from at least one of said remote cameras on at least one of said monitors and indicating on the graphical user interface means the monitor on which the video signal is being displayed, the remote camera from which the video signal is emanating and the field of view of the remote camera being displayed.
11. The apparatus of claim 10 further comprises:
remote camera control means connected to each of said remote cameras and to said processor means for positioning a respective remote camera upon receipts of signals from said processor means calling for movement of a remote camera and for providing feedback signals for said remote camera of their positions and field of view, the processor means using said feedback signals to create the graphical representation of a remote camera field of view.
remote camera control means connected to each of said remote cameras and to said processor means for positioning a respective remote camera upon receipts of signals from said processor means calling for movement of a remote camera and for providing feedback signals for said remote camera of their positions and field of view, the processor means using said feedback signals to create the graphical representation of a remote camera field of view.
12. A method for a closed circuit television network having a plurality of video display monitors for displaying output signals from a plurality of remote cameras, compris-ing the steps of:
generating output signals from a plurality of remote cameras, said generated output signals being indicative of field of view of said remote cameras;
generating on a graphics user interface screen graphical representations of an area, remote cameras and monitors, corresponding to an actual physical area, cameras and monitors, respectively;
designating one of said graphical representations on said graphics user interface screen; and displaying output signals of one of said remote camera on a monitor in response to the designation of one of said graphical representations by coupling a remote camera output signal to a monitor.
generating output signals from a plurality of remote cameras, said generated output signals being indicative of field of view of said remote cameras;
generating on a graphics user interface screen graphical representations of an area, remote cameras and monitors, corresponding to an actual physical area, cameras and monitors, respectively;
designating one of said graphical representations on said graphics user interface screen; and displaying output signals of one of said remote camera on a monitor in response to the designation of one of said graphical representations by coupling a remote camera output signal to a monitor.
13. The method of claim 12 wherein the step of designating one of said graphical representations further comprises the step of:
touching one of said graphical representation; and generating signals corresponding to the touching of one of said graphical representations, said generated signal affecting the coupling of said remote camera output signals to said monitors.
touching one of said graphical representation; and generating signals corresponding to the touching of one of said graphical representations, said generated signal affecting the coupling of said remote camera output signals to said monitors.
14. The method of claim 12 wherein said designating step comprises the step of:
designating a computer generated graphical representa-tion of an area which correlates to an actual physical area;
enabling a camera in close proximity to said physical area to produce a output signals indicative of said physical area; and displaying the output signals indicative of said physical area on a monitor.
designating a computer generated graphical representa-tion of an area which correlates to an actual physical area;
enabling a camera in close proximity to said physical area to produce a output signals indicative of said physical area; and displaying the output signals indicative of said physical area on a monitor.
15. The method of claim 12 further comprises the steps of:
designating a graphical representation of a camera that correlates to a physical camera in close proximity to a physical area;
enabling the physical camera which correlates to the graphical representation of a camera; and displaying the output signal from the physical camera on one of said monitors by coupling said output signal to one of said monitor.
designating a graphical representation of a camera that correlates to a physical camera in close proximity to a physical area;
enabling the physical camera which correlates to the graphical representation of a camera; and displaying the output signal from the physical camera on one of said monitors by coupling said output signal to one of said monitor.
16. The method of claim 15 further comprises the steps of:
designating a graphical representation of an area that correlates to a physical area;
designating a graphical representation of a monitor that is correlative to an actual monitor;
displaying on said actual monitor output signals from a remote camera in close proximity to said designated physical area, said displayed output signals being indica-tive of said physical area.
designating a graphical representation of an area that correlates to a physical area;
designating a graphical representation of a monitor that is correlative to an actual monitor;
displaying on said actual monitor output signals from a remote camera in close proximity to said designated physical area, said displayed output signals being indica-tive of said physical area.
17. The method of claim 6 further comprises the steps of:
designating a graphical representation of a remote camera that correlates to a remote camera;
focusing said designated camera on a physical area in close proximity thereto;
displaying the output signal from said camera on a monitor; and indicating on said graphical prepresentation the field of view of said remote camera.
designating a graphical representation of a remote camera that correlates to a remote camera;
focusing said designated camera on a physical area in close proximity thereto;
displaying the output signal from said camera on a monitor; and indicating on said graphical prepresentation the field of view of said remote camera.
18. The method of claim 17 further comprises the step of:
freezing a sequencing video display on a monitor by designating a graphical representation of said monitor.
freezing a sequencing video display on a monitor by designating a graphical representation of said monitor.
19. The method of claim 18 further comprises the step of:
clearing a video display from a monitor by designat-ing a graphical representation of said monitor when said monitor is in a non-sequencing mode.
clearing a video display from a monitor by designat-ing a graphical representation of said monitor when said monitor is in a non-sequencing mode.
20. The method of claim 19 further comprises the step of:
designating a graphical representation of a remote camera that correlates to a remote camera;
providing independent monitoring and panning of said remote camera upon designating said remote camera graphical representation;
automatically selecting a monitor to display said output signal from said designated remote camera; and displaying said output signal on said selected monitor.
designating a graphical representation of a remote camera that correlates to a remote camera;
providing independent monitoring and panning of said remote camera upon designating said remote camera graphical representation;
automatically selecting a monitor to display said output signal from said designated remote camera; and displaying said output signal on said selected monitor.
21. The method of claim 20 further comprises the steps of:
designating a graphical representation of a monitor within a specific period of designating a graphical representation of a remote camera; and displaying the output signal from said designated remote camera on said designated monitor by coupling said output signal from said remote camera to said monitor.
designating a graphical representation of a monitor within a specific period of designating a graphical representation of a remote camera; and displaying the output signal from said designated remote camera on said designated monitor by coupling said output signal from said remote camera to said monitor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US373,383 | 1989-06-29 | ||
| US07/373,383 US4992866A (en) | 1989-06-29 | 1989-06-29 | Camera selection and positioning system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2020033A1 true CA2020033A1 (en) | 1990-12-30 |
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ID=23472189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002020033A Abandoned CA2020033A1 (en) | 1989-06-29 | 1990-06-28 | Camera selection and positioning system and method |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4992866A (en) |
| CA (1) | CA2020033A1 (en) |
| GB (1) | GB2235848B (en) |
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-
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- 1989-06-29 US US07/373,383 patent/US4992866A/en not_active Expired - Fee Related
-
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- 1990-06-27 GB GB9014297A patent/GB2235848B/en not_active Expired - Fee Related
- 1990-06-28 CA CA002020033A patent/CA2020033A1/en not_active Abandoned
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|---|---|
| GB2235848B (en) | 1994-01-26 |
| GB2235848A (en) | 1991-03-13 |
| GB9014297D0 (en) | 1990-08-15 |
| US4992866A (en) | 1991-02-12 |
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