EP0126955A1 - Open-air ground surveillance apparatus - Google Patents

Open-air ground surveillance apparatus Download PDF

Info

Publication number
EP0126955A1
EP0126955A1 EP84104425A EP84104425A EP0126955A1 EP 0126955 A1 EP0126955 A1 EP 0126955A1 EP 84104425 A EP84104425 A EP 84104425A EP 84104425 A EP84104425 A EP 84104425A EP 0126955 A1 EP0126955 A1 EP 0126955A1
Authority
EP
European Patent Office
Prior art keywords
strip
open
surveillance system
air
control
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.)
Granted
Application number
EP84104425A
Other languages
German (de)
French (fr)
Other versions
EP0126955B1 (en
Inventor
Reinhard Dipl.-Ing. Herrmann
Hans Dipl.-Ing. Kaiser
Hartmut Dipl.-Ing. Schulz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kraftwerk Union AG
Original Assignee
Kraftwerk Union AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kraftwerk Union AG filed Critical Kraftwerk Union AG
Publication of EP0126955A1 publication Critical patent/EP0126955A1/en
Application granted granted Critical
Publication of EP0126955B1 publication Critical patent/EP0126955B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • 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
    • G08B13/19602—Image analysis to detect motion of the intruder, e.g. by frame subtraction
    • G08B13/1961—Movement detection not involving frame subtraction, e.g. motion detection on the basis of luminance changes in the image
    • 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
    • G08B13/19617—Surveillance camera constructional details
    • G08B13/19632—Camera support structures, e.g. attachment means, poles
    • 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

Definitions

  • the invention relates to an open-air surveillance system with a surveillance strip and with poles set up along the strip for the mounting of lighting fixtures and television cameras.
  • Outdoor areas with facilities to be protected are generally fenced and are checked from time to time.
  • it is known to illuminate a strip of land surrounding the open-air site to be monitored, generally the strip of land directly adjacent to the fence, and to monitor it by means of television cameras installed on masts.
  • the television images of the many television cameras must then be checked. This can lead to the fact that the crossing of the terrain strip to be monitored is overlooked because the surveillance personnel are watching another television monitor.
  • the continuous observation of a large number of television monitors with constantly similar image information is tiring and leads to poor concentration.
  • German Offenlegungsschrift 24 39 102 describes a method for storing images taken and digitized with a television camera, in which the coordinates of the changes in brightness or color and the lengths measured in the direction of the television lines are stored until the next change in brightness or color. With such a method, only the relevant image points in which changes in brightness or color of the stored boll image manifest themselves need to be compared with those of the actual image to be examined for image evaluation. Setpoint and actual value differences can then lead to an automatic signal triggering.
  • DE-OS 29 49 580 discloses how images recorded by a television camera can be processed so that it can be examined in a simplified manner whether predetermined structures are contained in the recorded image. To do this, the image is divided into grid sections. In the individual raster sections, the individual signal jumps are counted and transferred to a signal jump memory, the cells of which are each assigned to a raster step. The pixels within the raster sections at which the signal jumps occur are determined by means of a pixel counter, which adds up pulses of constant clock frequency during the scanning of each raster section. Its status is transferred to a pixel memory when a signal jump occurs.
  • An evaluation device retrieves the p rung Grande in the signal values contained in the order of storing from the received values summed, and outputs, if the received value is within a predetermined due to the festageden structure value range, which is formed by summing the received number of values on the address input of the pixel memory and evaluates the contents of the pixel memory cells called up in this way.
  • the present invention is based on the object of pointing out a way in which processes relevant to the monitoring can be automatically detected and displayed in the terrain strip to be monitored. At the same time, it should be avoided that irrelevant processes such as the sudden covering of the sun by clouds, climatic changes such as e.g. Snow or rain, as well as other natural events, such as falling leaves in autumn, or trigger false alarms.
  • the terrain strip according to the invention therefore consists of at least three control strips aligned parallel to one another, each of which has a different gray value
  • the lighting fixtures and television cameras assigned to the same terrain strip area are arranged several meters above the control strip and the television cameras are on an image evaluation device connected.
  • crossing with a body of any gray value in at least one control strip leads to a change in the gray value.
  • this also creates the prerequisite for distinguishing gray value changes that are caused by the climate or are caused by other natural events from those gray value changes that occur when crossing the stripe of the Glades.
  • Detection sensitivity can be increased considerably if, in a particularly advantageous development of the invention, the lighting fixtures assigned to a certain terrain strip area on the one hand and the television cameras assigned to the same terrain strip area on the other hand form an opening angle of more than 10 ° with one another from this terrain strip area. This will cause the television cameras not only the gray value of the penetrating object deviating from a control strip, but also the shadow of this object on the individual control strips in the dark.
  • an outdoor area 1 to be monitored can be seen on the left-hand side. This is delimited by a guarded area strip 2 fenced on both sides with respect to an unsecured area 3 located to the right of the area strip.
  • the area strip 2 surrounding the outdoor area to be monitored is secured on the side adjacent to the outdoor area with a wire fence 4 which is as tall as a man and secured against climbing.
  • the area strip 2 is only secured with a game protection fence 5.
  • masts 6, 7, 8 are set up which carry lighting fixtures 9, 10, 11, 12, 13, 14 and television cameras 15, 16, 17 aligned on the terrain strip 2.
  • the television cameras are aligned with a part of the terrain strip 2 located to the side of the respective mast.
  • Her cone forms an acute angle with the longitudinal axis of the strip of land. This allows a larger area to be monitored with fewer television cameras.
  • the two lighting fixtures of each mast illuminate the area of the site below and to the side of the mast streaking.
  • the mutual distance between the individual masts is designed such that the areas 18, 19, 20 of the terrain strip 2 monitored by the individual television cameras 15, 16, 17 overlap over their entire width
  • control strips 21, 22, 23, 24, 25, which extend parallel to one another along the strip of land 2 are applied to the strip of land.
  • the control strips are on both sides towards the respective fence 4, 5 from another narrow one with low planting, such as Grass covered strips of terrain 26, 27 edged.
  • the individual control strips 21 to 25 in the illustration of the figure are constructed as follows from left to right:
  • the first control strip 21 facing the fenced open area 1 is approximately 0.8 m wide and covered with river gravel. This is followed by a 0.6 m wide control strip 22, which is covered with quartz gravel. This is followed by another 1.0 m wide control strip 23, which in turn is covered with river gravel.
  • Two 0.3 m high walls 28, 29 have been erected along the 0.45 m wide control strip 24 adjoining this.
  • the game protection fence 5 on the outside of the terrain strip 2 and the higher wire fence 4 on the side of the terrain strip 2 facing the outdoor area 1 to be monitored prevents larger animals, such as deer, dogs and rabbits, in the area to be monitored least 2 can penetrate.
  • the control strips 21 to 25 are designed in such a way that there are clear gray value changes between adjacent control strips in any weather. In dry and even more in wet weather, the light quartz gravel with its gray value stands out from the two neighboring dark river gravel strips. If there is a closed layer of snow in winter and covers the various gravel strips, the side flanks of the two walls 28, 29 remain free of snow. Even if there should be snow on its upper edge, this snow cap, from the viewing direction of the television recording cameras 15, 16, 17 from diagonally above, contrasts with the gray of the side flanks of these walls.
  • an object of any gray value slides over a control strip of another gray value, its gray value in the covered area initially changes only in a certain direction. It either becomes lighter or darker without changing the gray value of the adjacent control strip which has not yet been entered. If two adjacent control strips are simultaneously covered by one and the same object of any gray value, the lighter control strip in the covered area generally becomes darker and the darker control strip in the covered area becomes lighter. This is always the case when the gray value of the covering object lies between the gray values of the two adjacent control strips. If the gray value of the covering object reaches the gray value of one of the two control strips, the gray value of the other control strip will nevertheless change compared to the unchanged gray value of the first control strip.
  • False alarms such as those caused by very small objects, e.g. falling leaves or small animals such as Mice that can be triggered can be avoided if the image evaluation device sums up the trigger signals from several immediately adjacent raster fields resulting from gray value changes, insofar as a gray value change signal is generated in them, and routes the summed signal via a discriminator. If necessary, its threshold can be set so high that small covers, such as those caused by a mouse or a sheet, with their summed signal values are still below the threshold that is necessary for the actual signal triggering. Larger objects, such as a dog or a person, result in such a summation of the trigger signals that a signal is triggered.

Abstract

1. Open-air ground surveillance apparatus comprising a strip of ground (2) which is to be monitored and comprising poles (6, 7, 8) which are erected along the strip of ground (2) and serve to support illuminators (9 to 14) and television cameras (15, 16, 17) which are connected to an image analysing device, characterised in that the strip of ground (2) comprises at least three control strips (21 to 25), which are aligned parallel to one another and each of which has a different grey value, and that the illuminators (9 to 14) and television cameras (15, 16, 17) which are assigned to one and the same region of ground strip are supported several metres above the control strip.

Description

Die Erfindung bezieht sich auf eine Freigeländeüberwachungsanlage mit einem zu überwachenden Geländestreifen und mit längs des Geländestreifens aufgestellten Masten für die Halterung von Beleuchtungskörpern und von Fernsehkameras.The invention relates to an open-air surveillance system with a surveillance strip and with poles set up along the strip for the mounting of lighting fixtures and television cameras.

Freigelände mit zu schützenden Einrichtungen sind im allgemeinen umzäunt und werden von Zeit zu Zeit kontrolliert. Zur Verringerung des für die Überwachung erforderlichen Personalaufwandes ist es bekannt, einen das zu überwachende Freigelände umschließenden Geländestreifen, im allgemeinen den am Zaun unmittelbar angrenzenden Geländestreifen, zu beleuchten und mittels an Masten installierten Fernsehkameras zu überwachen. Bei langen zu überwachenden Geländestreifen sind dann aber die Fernsehbilder der vielen Fernsehkameras zu kontrollieren. Das kann dann dazu führen, daß das Durchqueren des zu überwachenden Geländestreifens übersehen wird, weil das Überwachungspersonal gerade einen anderen Fernsehmonitor beobachtet. Darüber hinaus ist die fortlaufende Beobachtung einer Vielzahl von Fernsehmonitoren mit stets gleichartiger Bildinformation ermüdend und führt zu Konzentrationsschwäche.Outdoor areas with facilities to be protected are generally fenced and are checked from time to time. To reduce the manpower required for monitoring, it is known to illuminate a strip of land surrounding the open-air site to be monitored, generally the strip of land directly adjacent to the fence, and to monitor it by means of television cameras installed on masts. In the case of long strips of land to be monitored, the television images of the many television cameras must then be checked. This can lead to the fact that the crossing of the terrain strip to be monitored is overlooked because the surveillance personnel are watching another television monitor. In addition, the continuous observation of a large number of television monitors with constantly similar image information is tiring and leads to poor concentration.

Ein automatisches Bildauswertesystem, das speziell für die Überwachung von Fabrikationsprozessen entwickelt wurde, befindet sich bereits auf dem Markt. Dieses Bildauswertesystem bemerkt Abweichungen von aufgenommenen Bildinhalten gegenüber vorgespeicherten Bildinhalten. Bei Abweichungen zwischen dem gespeicherten und dem aufgenommenen Bildinhalt ist dieses Bildauswertesystem im Stande selbsttätig eine Funktion auszulösen. In der deutschen Offenlegungsschrift 24 39 102 ist ein Verfahren zum Speichern von mit einer Fernsehkamera aufgenommenen und digitalisierten Bildern beschrieben, bei denen die Koordinaten der Helligkeits- oder Farbänderungen und die in Richtung der Fernsehzeilen gemessenen LängEn bis zur nächsten Helligkeits- oder Farbänderung gespeichert werden. Bei einem solchen Verfahren brauchen zur Bildauswertung nur die relevanten Bildpunkte, in denen sich Helligkeit- oder Farbänderungen des gespeicherten Bollbildes manifestieren mit jenen des zu untersuchenden Istbildes vergleichen zu werden. Soll- und Istwertdifferenzen können dann zu einer selbsttätigen Signalauslösung führen.An automatic image evaluation system, which was specially developed for monitoring manufacturing processes, is already on the market. This image evaluation system detects deviations from recorded image contents compared to pre-stored image contents. In the event of deviations between the stored and the recorded image content, this image evaluation system is capable of automatically triggering a function. German Offenlegungsschrift 24 39 102 describes a method for storing images taken and digitized with a television camera, in which the coordinates of the changes in brightness or color and the lengths measured in the direction of the television lines are stored until the next change in brightness or color. With such a method, only the relevant image points in which changes in brightness or color of the stored boll image manifest themselves need to be compared with those of the actual image to be examined for image evaluation. Setpoint and actual value differences can then lead to an automatic signal triggering.

In der DE-OS 29 49 580 ist offenbart, wie von einer Fernsehkamera aufgenommene Bilder aufbereitet werden können, damit in vereinfachter Weise untersucht werden kann, ob in dem aufgenommenen Bild vorgegebene Strukturen enthalten sind. Hierzu wird das Bild in Rasterabschnitte unterteilt. In den einzelnen Rasterabschnitten werden die einzelnen Signalsprünge gezählt und in einem Signalsprungspeicher übernommen, dessen Zellen je einem Rasterschritt zugeordnet sind. Die Bildpunkte innerhalb der Rasterabschnitte, an denen die Signalsprünge auftreten, werden mittels eines Bildpunktzählers bestimmt, der Impulse konstanter Taktfrequenz während der Abtastung eines jeden Rasterabschnittes aufsummiert. Dessen Stand wird bei Auftreten eines Signalsprunges in einen Bildpunktspeicher übernommen. Eine Auswerteeinrichtung ruft die im Signalsprungspeicher enthaltenen Werte in der Reihenfolge des Einspeicherns ab, summiert die empfangenen Werte auf und gibt, wenn der empfangene Wert in einem aufgrund der festzustellenden Struktur vorgegebenen Wertebreich liegt, die durch Aufsummieren der empfangenen Werte gebildete Zahl auf den Adresseingang des Bildpunktspeichers und wertet die Inhalte der so aufgerufenen Bildpunktspeicherzellen aus.DE-OS 29 49 580 discloses how images recorded by a television camera can be processed so that it can be examined in a simplified manner whether predetermined structures are contained in the recorded image. To do this, the image is divided into grid sections. In the individual raster sections, the individual signal jumps are counted and transferred to a signal jump memory, the cells of which are each assigned to a raster step. The pixels within the raster sections at which the signal jumps occur are determined by means of a pixel counter, which adds up pulses of constant clock frequency during the scanning of each raster section. Its status is transferred to a pixel memory when a signal jump occurs. An evaluation device retrieves the p rungspeicher in the signal values contained in the order of storing from the received values summed, and outputs, if the received value is within a predetermined due to the festzustellenden structure value range, which is formed by summing the received number of values on the address input of the pixel memory and evaluates the contents of the pixel memory cells called up in this way.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Weg zu weisen, wie für die Überwachung relevante Vorgänge in dem zu überwachenden Geländestreifen automatisch erfaßt und zur Anzeige gebracht werden können. Dabei soll aber gleichzeitig vermieden werden, daß für die Überwachung irrelevante Vorgänge, wie die plötzliche Abdeckung der Sonne durch Wolken, klimatische Änderungen, wie z.B. Schneefall oder Regen, wie auch andere natürliche Ereignisse, wie etwa der Laubfall im Herbst zur Anzeige gelangen oder Fehlalarme auslösen.The present invention is based on the object of pointing out a way in which processes relevant to the monitoring can be automatically detected and displayed in the terrain strip to be monitored. At the same time, it should be avoided that irrelevant processes such as the sudden covering of the sun by clouds, climatic changes such as e.g. Snow or rain, as well as other natural events, such as falling leaves in autumn, or trigger false alarms.

Bei einer Freigeländeüberwachungsanlage der eingangs genannten Art besteht daher erfindungsgemäß der Geländestreifen aus mindestens drei parallel zueinander ausgerichteten Kontrollstreifen, von denen ein jeder einen unterschiedlichen Grauwert besitzt, sind die ein- und demselben Geländestreifenbereich zugeordneten Beleuchtungskörper und Fernsehkameras mehrere Meter über dem Kontrollstreifen angeordnet und die Fernsehkameras an eine Bildauswerteeinrichtung angeschlossen. Bei einem solchen Geländestreifen führt die Durchquerung mit einem Körper beliebigen Grauwerts in mindestens einem Kontrollstreifen zu einer Grauwertänderung. Zugleich wird damit auch die Voraussetzung geschaffen, Grauwertänderungen,die klimatisch bedingt sind, oder durch andere natürliche Ereignisse erzeugt werden, von solchen Grauwertänderungen zu unterscheiden, die beim Überqueren des Gländestreifens entstehen.In an open-air surveillance system of the type mentioned at the outset, the terrain strip according to the invention therefore consists of at least three control strips aligned parallel to one another, each of which has a different gray value, the lighting fixtures and television cameras assigned to the same terrain strip area are arranged several meters above the control strip and the television cameras are on an image evaluation device connected. With such a strip of land, crossing with a body of any gray value in at least one control strip leads to a change in the gray value. At the same time, this also creates the prerequisite for distinguishing gray value changes that are caused by the climate or are caused by other natural events from those gray value changes that occur when crossing the stripe of the Glades.

Die Nachweisempfindlichkeit läßt sich beträchtlich steigern, wenn in besonders vorteilhafter Weiterbildung der Erfindung, die einem bestimmten Geländestreifenbereich zugeordneten Beleuchtungskörper einerseits und die demselben Geländestreifenbereich zugeordneten Fernsehkameras andererseits von diesem Geländestreifenbereich aus gesehen einen Öffnungswinkel von mehr als 10° miteinander bilden. Hierdurch wird von den Fernsehkameras nicht nur der von einem Kontrollstreifen abweichende Grauwert des eindringenden Objektes, sondern bei Dunkelheit auch noch der Schatten dieses Objektes auf den einzelnen Kontrollstreifen erfaßbar.Detection sensitivity can be increased considerably if, in a particularly advantageous development of the invention, the lighting fixtures assigned to a certain terrain strip area on the one hand and the television cameras assigned to the same terrain strip area on the other hand form an opening angle of more than 10 ° with one another from this terrain strip area. This will cause the television cameras not only the gray value of the penetrating object deviating from a control strip, but also the shadow of this object on the individual control strips in the dark.

heitere Einzelheiten der Erfindung werden anhand eines in der Figur dargestellten Ausführungsbeispiels erläutert:

  • Die Figur zeigt einen Ausschnitt eines erfindungsgemäßen,ein zu schützendes Freigelände umschließenden, selbsttätig überwachten Geländestreifen.
cheerful details of the invention are explained with reference to an embodiment shown in the figure:
  • The figure shows a section of an automatically monitored terrain strip according to the invention, which encloses an outdoor area to be protected.

In der Darstellung der Figur ist auf der linken Seite ein zu überwachendes Freigelände 1 zu erkennen. Dieses wird durch einen beiderseits umzäunten, überwachten Geländestreifen 2 gegenüber einem rechts des Geländestreifens befindlichen, ungesicherten Gelände 3 abgegrenzt. Der das zu überwachende Freigelände umschliessende Geländestreifen 2 ist auf der an das Freigelände angrenzenden Seite mit einem übermannshohen, gegen Übersteigen gesicherten Drahtzaun 4 abgesichert. Auf der dem ungesicherten Gelände 3 zugewandten Seite ist der Geländestreifen 2 lediglich mit einem Wildschutzzau-n 5 gesichert. Auf der dem zu überwachenden Freigelände 1 zugewandten Seite des Geländestreifens 2 sind Masten 6, 7, 8 aufgestellt, die auf dem Geländestreifen 2 ausgerichtete Beleuchtungskörper 9, 10, 11, 12, 13, 14 und Fernsehkameras 15, 16, 17 tragen. Die Fernsehkameras sind auf einen seitlich des jeweiligen Mastes befindlichen Teil des Geländestreifens 2 ausgerichtet. Dabei bildet ihr Aufnahmekegel einen spitzen Winkel mit der Längsachse des Geländestreifens. Hierdurch läßt sich eine größere Fläche mit weniger Fernsehkameras überwachen. Die beiden Beleuchtungskörper eines jeden Mastes beleuchten jeweils den unter und seitliche des Mastes befindlichen Bereich des Geländestreifens. Der gegenseitige Abstand der einzelnen Masten ist so ausgelegt, daß sich die von den einzelnen Fernsehkameras 15, 16, 17 überwachten Bereiche 18, 19, 20 des Geländestreifens 2 über dessen ganze Breite hinweg überlappenIn the illustration of the figure, an outdoor area 1 to be monitored can be seen on the left-hand side. This is delimited by a guarded area strip 2 fenced on both sides with respect to an unsecured area 3 located to the right of the area strip. The area strip 2 surrounding the outdoor area to be monitored is secured on the side adjacent to the outdoor area with a wire fence 4 which is as tall as a man and secured against climbing. On the side facing the unsecured area 3, the area strip 2 is only secured with a game protection fence 5. On the side of the terrain strip 2 facing the outdoor area 1 to be monitored, masts 6, 7, 8 are set up which carry lighting fixtures 9, 10, 11, 12, 13, 14 and television cameras 15, 16, 17 aligned on the terrain strip 2. The television cameras are aligned with a part of the terrain strip 2 located to the side of the respective mast. Her cone forms an acute angle with the longitudinal axis of the strip of land. This allows a larger area to be monitored with fewer television cameras. The two lighting fixtures of each mast illuminate the area of the site below and to the side of the mast streaking. The mutual distance between the individual masts is designed such that the areas 18, 19, 20 of the terrain strip 2 monitored by the individual television cameras 15, 16, 17 overlap over their entire width

Auf dem Geländestreifen sind fünf, unmittelbar aneinandergrenzende Kontrollstreifen 21, 22, 23, 24, 25 angelegt, die sich parallel zueinander längs des Gländestreifens 2 erstrecken. Die Kontrollstreifen sind auf beiden Seiten zum jeweiligen Zaun 4, 5 hin von je einem weiteren schmalen mit niedriger Bepflanzung, wie z.B. Gras bedeckten Streifen Geländes 26, 27 umsäumt. Die einzelnen Kontrollstreifen 21 bis 25 sind in der Darstellung der Figur von links nach rechts wie folgt aufgebaut: Der erste, dem umzäunten Freigelände 1 zugewandte Kontrollstreifen 21 ist etwa 0,8 m breit und mit Flußkies bedeckt. Daran schließt sich ein 0,6 m breiter Kontrollstreifen 22 an, der mit Quarzkies bedeckt ist. Danach folgt ein weiterer 1,0 m breiter Kontrollstreifen 23, der wiederum mit Flußkies bedeckt ist. Längs des hieran anschließenden 0,45 m breiten Kontrollstreifens 24 sind zwei 0,3 m hohe Mäuerchen 28, 29 errichtet. Sie bestehen in der Darstellung der Figur aus grauem Beton, sie könnten aber auch ebensogut aus grauen senkrecht stehenden Steinplatten gefertigt sein. Die Mäuerchen 28, 29 sind elektrisch beheizbar. An dem Kontrollstreifen 24 mit den beiden Mäuerchen schließt sich ein mit Flußkies bedeckter 2,15 m breiter Kontrollstreifen 25 an. Dahinter beginnt der mit Gras bedeckte Streifen Geländes 27, der bis zum Wildschutzzaun 5 reicht.Five, directly adjacent control strips 21, 22, 23, 24, 25, which extend parallel to one another along the strip of land 2, are applied to the strip of land. The control strips are on both sides towards the respective fence 4, 5 from another narrow one with low planting, such as Grass covered strips of terrain 26, 27 edged. The individual control strips 21 to 25 in the illustration of the figure are constructed as follows from left to right: The first control strip 21 facing the fenced open area 1 is approximately 0.8 m wide and covered with river gravel. This is followed by a 0.6 m wide control strip 22, which is covered with quartz gravel. This is followed by another 1.0 m wide control strip 23, which in turn is covered with river gravel. Two 0.3 m high walls 28, 29 have been erected along the 0.45 m wide control strip 24 adjoining this. They consist of gray concrete in the representation of the figure, but they could just as well be made of gray vertical stone slabs. The walls 28, 29 are electrically heated. The control strip 24 with the two walls is followed by a 2.15 m wide control strip 25 covered with river gravel. Behind it begins the strip of terrain 27 covered with grass, which extends to the game protection fence 5.

Durch den Wildschutzzaun 5 auf der Außenseite des Geländestreifens 2 und den höheren Drahtzaun 4 auf der dem zu überwachenden Freigelände 1 zugewandten Seite des Geländestreifens 2 wird verhindert, daß größere Tiere, wie Rehe, Hunde und Hasen, in dem zu überwachenden Geländestreifen 2 eindringen können. Die Kontrollstreifen 21 bis 25 sind so ausgelegt, daß bei jeder Witterung deutliche Grauwertänderungen zwischen benachbarten Kontrollstreifen bestehen. Bei trockener und noch mehr bei nasser Witterung hebt sich der helle Quarzkies mit seinem Grauwert stark gegenüber den beiden benachbarten dunklen Flußkiesstreifen ab. Wenn im Winter eine geschlossene Schneedecke liegt und die verschiedenen Kiesstreifen zudeckt, so bleiben dennoch die Seitenflanken der beiden Mäuerchen 28, 29 schneefrei. Selbst wenn auf deren Oberkante Schnee liegen sollte, so hebt sich diese Schneehaube, aus der Blickrichtung der Fernsehaufnahmekameras 15, 16, 17 von schräg oben, vom Grau der Seitenflanken dieser Mäuerchen kontrastreich ab.The game protection fence 5 on the outside of the terrain strip 2 and the higher wire fence 4 on the side of the terrain strip 2 facing the outdoor area 1 to be monitored prevents larger animals, such as deer, dogs and rabbits, in the area to be monitored least 2 can penetrate. The control strips 21 to 25 are designed in such a way that there are clear gray value changes between adjacent control strips in any weather. In dry and even more in wet weather, the light quartz gravel with its gray value stands out from the two neighboring dark river gravel strips. If there is a closed layer of snow in winter and covers the various gravel strips, the side flanks of the two walls 28, 29 remain free of snow. Even if there should be snow on its upper edge, this snow cap, from the viewing direction of the television recording cameras 15, 16, 17 from diagonally above, contrasts with the gray of the side flanks of these walls.

Dieser Kontrast wird Nachts noch dadurch verstärkt, daß die Oberkante des den Beleuchtungskörpern 9 bis 14 zugewandten Mäuerchens 28 einen Schlagschatten auf das dahinter befindliche Mäuerchen 29 wirft, der von den vor den Beleuchtungskörpern mit steilerer Blickrichtung angeordneten Fernsehkameras 15, 16, 17 mit erfaßt wird. Den Fernsehkameras präsentiert sich somit eine Folge von dunkel-hell-dunkel-hell-dunkel-....-Streifen.This contrast is increased at night by the fact that the upper edge of the wall 28 facing the lighting fixtures 9 to 14 casts a drop shadow on the wall 29 located behind it, which is also detected by the television cameras 15, 16, 17 arranged in front of the lighting fixtures with a steeper viewing direction. The television cameras are thus presented with a sequence of dark-light-dark-light-dark -....- stripes.

Bei einer Überquerung des Geländestreifens 2 unterbricht die überquerende Person, selbst wenn ihre Bekleidung im Grauwert mit der eines der verwendeten Kontrollstreifen 21 bis 25 übereinstimmt, dennoch den Grauwert der jeweils benachbarten Kontrollstreifen. Gleiches gilt auch für das Überqueren der beiden parallelen Mäuerchen 28, 29. Aber auch bei Schneelage wird beim Überqueren der beiden Mäuerchen in einem weißen Schneeanzug das kontrastreiche Streifenmuster gestört. Im letztgenannten Fall hebt sich das Weiß des Schneeanzugs vom Grau der Stirnflächen der Mäuerchen ab. Dieser Effekt wird noch verstärkt, wenn die beiden Mäuerchen mit einer Heizeinrichtung versehen sind, die den auf der Maueroberkante liegenden Schnee abtaut.When crossing the terrain strip 2, the person crossing it interrupts the gray value of the respectively adjacent control strips, even if their clothing matches the gray value with that of one of the control strips 21 to 25 used. The same applies to the crossing of the two parallel walls 28, 29. But even in snowy conditions, the contrasting stripe pattern is disturbed when crossing the two walls in a white snowsuit. In the latter case, the white of the snowsuit stands out against the gray of the walls of the walls. This effect is further enhanced if the two walls are provided with a heating device that is on the top of the wall defrosting snow.

Bei einer Überquerung des Geländestreifens 2 bei Nacht ergeben sich nicht nur jene Änderungen der Grauwerte im Bereich der einzelnen Kontrollstreifen, wo die einzelnen Grauwerte durch den oder die Grauwerte der den Geländestreifen 2 überquerenden Person ersetzt werden, sondern es ergeben sich auch zu beiden Seiten der überquerenden Person Grauwertänderungen in den Kontrollstreifen, die durch die beiden seitlichen Schlagschatten bedingt sind, die die auf den jeweils benachbarten Masten 6, 7, 8 angeordneten Beleuchtungskörper 9 bis 14 von der überquerenden Person auf die Kontrollstreifen 21 bis 25 werfen.When crossing the terrain strip 2 at night, not only do the gray values change in the area of the individual control strips, where the individual gray values are replaced by the gray value or values of the person crossing the terrain strip 2, but there are also those on both sides of the crossing Person Gray value changes in the control strips, which are caused by the two lateral drop shadows that throw the lighting fixtures 9 to 14 arranged on the respective adjacent masts 6, 7, 8 from the person crossing over onto the control strips 21 to 25.

Wenn sich ein Objekt beliebigen Grauwerts über einen Kontrollstreifen eines anderen Grauwertes schiebt, so verändert sich dessen Grauwert im abgedeckten Bereich zunächst nur in einer bestimmten Richtung. Es wird entweder heller oder dunkler, ohne daß sich dadurch der Grauwert des zunächst noch nicht betretenen benachbarten Kontrollstreifens verändert. Bei gleichzeitiger Abdekkung zweier benachbarter Kontrollstreifen durch ein und dasselbe Objekt beliebigen Grauwertes, wird im allgemeinen der hellere Kontrollstreifen im abgedeckten Bereich dunkler und der dunklere Kontrollstreifen im abgedeckten Bereich heller. Dies ist immer dann der Fall, wenn der Grauwert des abdeckenden Objektes zwischen den Grauwerten der beiden benachbarten Kontrollstreifen liegt. Erreicht der Grauwert des abdeckenden Objektes, den Grauwert eines der beiden Kontrollstreifen, so wird sich dennoch der Grauwert des anderen Kontrollstreifens gegenüber dem unveränderten Grauwert des ersten Kontrollstreifens ändern. Unter Zugrundelegung dieser Überlegungen lassen sich Fehlalarme, wie sie z.B. durch die Abdeckung der Sonne durch eine Wolke erzeugt werden können, vermeiden. Voraussetzung hierfür ist aber, daß die Bildauswerteeinrichtung die Bildinformation in einzelnen kleine Rasterfeldern erfaßt. Dabei wird der Grauwert je Rasterfeld mit dem zuvor gespeicherten Grauwert dieses Rasterfeldes verglichen. Grauwertänderungen, d.h. Differenzen zwischen dem gespeicherten Grauwertsignal und dem neuen Grauwertsignal werden als Signal weitergeleitet und mit der Grauwertänderung des benachbarten Rasterfeldes verglichen. Über eine Schaltungslogik wird nun dafür gesorgt, daß nur gegenläufige Grauwertänderungen benachbarter Rasterfelder zu einem Auslösesignal führen, während sich die Signale gleichgerichteter Grauwertänderungen gegenseitig blockieren. Auf diese Weise können Vorgänge, die eine gleichsinnige Änderung des Grauwertes benachbarter Rasterfelder - die benachbarten Kontrollstreifen zugeordnet sein können - zur Folge haben, wie z.B. Beleuchtungsänderungen, unterdrückt werden.If an object of any gray value slides over a control strip of another gray value, its gray value in the covered area initially changes only in a certain direction. It either becomes lighter or darker without changing the gray value of the adjacent control strip which has not yet been entered. If two adjacent control strips are simultaneously covered by one and the same object of any gray value, the lighter control strip in the covered area generally becomes darker and the darker control strip in the covered area becomes lighter. This is always the case when the gray value of the covering object lies between the gray values of the two adjacent control strips. If the gray value of the covering object reaches the gray value of one of the two control strips, the gray value of the other control strip will nevertheless change compared to the unchanged gray value of the first control strip. Based on these considerations, false alarms, such as those that can be generated by covering the sun with a cloud, can be avoided. requirement for this, however, is that the image evaluation device captures the image information in individual small raster fields. The gray value per grid is compared with the previously saved gray value of this grid. Gray value changes, ie differences between the stored gray value signal and the new gray value signal are forwarded as a signal and compared with the gray value change of the adjacent grid. A circuit logic ensures that only opposite gray value changes of adjacent grid fields lead to a trigger signal, while the signals of the same gray value changes block each other. In this way, processes which result in a change in the same direction of the gray value of adjacent grid fields - which can be assigned to adjacent control strips - such as changes in lighting can be suppressed.

Fehlalarme, wie sie durch sehr kleine Objekte, wie z.B. fallendes Laub oder kleine Tiere, wie z.B. Mäuse, ausgelöst werden können, lassen sich vermeiden, wenn die Bildauswerteeinrichtung die von Grauwertänderungen herrührenden Auslösesignale mehrerer unmittelbar benachbarter Rasterfelder, soweit in ihnen ein Grauwertänderungssignal erzeugt wird, aufsummiert und das aufsummierte Signal über einen Diskriminator leitet. Dessen Schwelle kann bedarfsweise so hoch gelegt werden, daß kleine Abdeckungen, wie sie durch eine Maus oder ein Blatt verursacht werden, mit ihren aufsummierten Signalwerten noch unter jener Schwelle liegen, die zur eigentlichen Signalauslösung erforderlich ist. Größere Gegenstände, wie ein Hund oder eine Person haben jedoch eine derartige Aufsummierung der Auslösesignale zur Folge, daß eine Signalauslösung erfolgt.False alarms, such as those caused by very small objects, e.g. falling leaves or small animals such as Mice that can be triggered can be avoided if the image evaluation device sums up the trigger signals from several immediately adjacent raster fields resulting from gray value changes, insofar as a gray value change signal is generated in them, and routes the summed signal via a discriminator. If necessary, its threshold can be set so high that small covers, such as those caused by a mouse or a sheet, with their summed signal values are still below the threshold that is necessary for the actual signal triggering. Larger objects, such as a dog or a person, result in such a summation of the trigger signals that a signal is triggered.

Claims (23)

1. Freigeländeüberwachungsanlage mit einem zu überwachenden Geländestreifen und mit längs des Geländestreifens aufgestellten Masten für die Halterung von Beleuchtungskörpern und von Fernsehkameras, dadurch gekennzeichnet , daß der Geländestreifen (2) aus mindestens drei parallel zueinander ausgerichteten Kontrollstreifen (21, 22, 23, 24, 25) besteht, von denen ein jeder einen unterschiedlichen Grauwert besitzt, die ein und demselben Geländestreifenbereich zugeordneten Beleuchtungskörper (9, 10, 11, 12, 13, 14) und Fernsehkameras (15, 16, 17) mehrere Meter über den Kontrollstreifen gehaltert und die Fernseh- kameras an eine Bildauswerteeinrichtung angeschlossen sind.1. Open-air site surveillance system with a site strip to be monitored and with masts set up along the site strip for holding lighting fixtures and television cameras, characterized in that the site strip (2) consists of at least three control strips (21, 22, 23, 24, 25) aligned parallel to one another ), each of which has a different gray value, the lighting fixtures (9, 10, 11, 12, 13, 14) and television cameras (15, 16, 17) assigned to the same striped area are held several meters above the control strip and the television - Cameras are connected to an image evaluation device. 2. Freigeländeübervlachungsanlage nach Anspruch 1, dadurch gekennzeichnet , daß die einem bestimmten Geländestreifenbereich zugeordneten Beleuchtungskörper (9, 10, 11, 12, 13, 14) einerseits und Fernsehkameras (15, 16, 17). andererseits von diesem Geländestreifenbereich aus gesehen, einen Öffnungswinkel von mehr als 10° miteinander bilden.2. Freigeländeüberv l achungsanlage according to claim 1, characterized in that associated with a particular strip of land area lighting bodies (9, 10, 11, 12, 13, 14) on the one hand, and television cameras (15, 16, 17). on the other hand, seen from this area strip area, form an opening angle of more than 10 ° with one another. 3. Freigeländeüberwachungsanlage nach Anspruch 2, dadurch gekennzeichnet , daß ein Winkel von 5° bei der Projektion des Öffnungswinkels in eine Ebene parallel zur Erstreckung des Geländestreifens (2) nicht unterschritten wird.3. open-air surveillance system according to claim 2, characterized in that an angle of 5 ° in the projection of the opening angle in a plane parallel to the extent of the terrain strip (2) is not fallen below. 4. Freigeländeüberwachungsanlage nach Anspruch 1, dadurch gekennzeichnet , daß die Kontrollstreifen (21 bis 25) parallel zum Geländestreifen (2) ausgerichtet sind.4. open-air surveillance system according to claim 1, characterized in that the control strips (21 to 25) are aligned parallel to the terrain strip (2). 5. Freigeländeüberwachungsanlage nach Anspruch 1, dadurch gekennzeichnet , daß mindestens ein Kontrollstreifen (21, 22, 23, 25) mit geschottertem Steinnaterial bedeckt ist.5. open-air surveillance system according to claim 1, characterized in that at least one control strip (21, 22, 23, 25) is covered with crushed stone material. 6. Freigeländeüberwachungsanlage nach Anspruch 1, dadurch gekennzeichnet , daß mindestens ein Kontrollstreifen (21, 23, 25) mit Flußkies bedeckt ist.6. Outdoor area monitoring system according to claim 1, characterized in that at least one control strip (21, 23, 25) is covered with river gravel. 7. Freigeländeüberwachungsanlage nach Anspruch 1, dadurch gekennzeichnet , daß mindestens ein Kontrollstreifen (22) mit Quarzkies bedeckt ist.7. open-air surveillance system according to claim 1, characterized in that at least one control strip (22) is covered with quartz gravel. 8.Freigeländeüberwachungsanlage nach Anspruch 1, dadurch gekennzeichnet , daß mindestens ein Kontrollstreifen (24) betoniert ist.8. outdoor surveillance system according to claim 1, characterized in that at least one control strip (24) is concreted. 9. Freigeländeüberwachungsanlage nach Anspruch 1, dadurch gekennzeichnet , daß mindestens ein Kontrollstreifen zementiert ist.9. outdoor surveillance system according to claim 1, characterized in that at least one control strip is cemented. 10. Freigeländeüberwachungsanlage nach Anspruch 1, dadurch gekennzeichnet , daß längs eines Kontrollstreifens auf einer Stirnseite stehende Platten aufgestellt sind.10. open-air surveillance system according to claim 1, characterized in that standing along a control strip standing on an end plates. 11. Freigeländeüberwachungsanlage nach Anspruch 1, dadurch gekennzeichnet , daß wenigstens eine kleine Mauer (28, 29) längs einem der Kontrollstreifen (24) errichtet ist.11. outdoor surveillance system according to claim 1, characterized in that at least one small wall (28, 29) along one of the control strips (24) is erected. 12. Freigeländeüberwachungsanlage nach Anspruch 11, dadurch gekennzeichnet , daß die Mauer (28, 29) mindestens 10 cm hoch ist.12. Outdoor surveillance system according to claim 11, characterized in that the wall (28, 29) is at least 10 cm high. 13. Freiseländeüberwachungsanlage nach Anspruch 11, dadurch gekennzeichnet , daß zwei annähernd gleich hohe Mauern (28, 29) parallel zueinander errichtet sind.13. outdoor surveillance system according to claim 11, characterized in that two approximately the same high walls (28, 29) are erected parallel to each other. 14. Freigeländeüberwachungsanlage nach Anspruch 13, dadurch gekennzeichnet , daß der gegenseitige Abstand der beiden Mauern (28, 29) geringer ist als ihre Höhe.14. open-air surveillance system according to claim 13, characterized in that the mutual distance between the two walls (28, 29) is less than their height. 15. Freigeländeüberwachungsanlage nach Anspruch 1, dadurch gekennzeichnet , daß der Geländestreifen (2) beidseitig mit je einem Zaun (3, 4) gesichert ist.15. open-air surveillance system according to claim 1, characterized in that the terrain strip (2) is secured on both sides with a fence (3, 4). 16. Freigeländeüberwachungsanlage nach Anspruch 1, dadurch gekennzeichnet , daß die Masten (6, 7, 8) auf der Seite des Geländestreifens (2) angeordnet sind, die dem abzusichernden Freigelände (1) zugewandt ist.16. Open-air site monitoring system according to claim 1, characterized in that the masts (6, 7, 8) are arranged on the side of the strip of land (2) which faces the open-air site to be secured (1). 17. Freigeländeüberwachungsanlage nach Anspruch 1, dadurch gekennzeichnet , daß die Bildauswerteeinrichtung die Bildinformation in einzelnen Rasterfeldern untersucht.17. Outdoor area monitoring system according to claim 1, characterized in that the image evaluation device examines the image information in individual grid fields. 18. Freigeländeüberwachungsanlage nach Anspruch 1 oder 17, dadurch gekennzeichnet , daß die Bildauswerteeinrichtung Änderungen der Grauwertabstufung gegenüber einem benachbarten Kontrollstreifen erfaßt.18. Outdoor area monitoring system according to claim 1 or 17, characterized in that the image evaluation device detects changes in the gray value gradation compared to an adjacent control strip. 19. Freigeländeüberwachungsanlage nach Anspruch 1 oder 17, dadurch gekennzeichnet , daß die Bildauswerteeinrichtung zwischen gleichgerichteten und entgegengerichteten Änderungen des Grauwertes in benachbarten Kontrollstreifen unterscheidet.19. Outdoor area monitoring system according to claim 1 or 17, characterized in that the image evaluation device distinguishes between rectified and opposite changes in the gray value in adjacent control strips. 20. Freigeländeüberwachungsnalage nach Anspruch 17, dadurch gekennzeichnet , daß die Bildauswerteeinrichtung die Signale nebeneinanderliegender auslösender Bildrasterfelder summiert.20. open-air surveillance system according to claim 17, characterized in that the image evaluation device sums the signals of adjacent triggering image grid fields. 21. Freigeländeüberwachungsanlage nach Anspruch 1, dadurch gekennzeichnet , daß ein Kontrollstreifen beheizbar ist.21. Outdoor area monitoring system according to claim 1, characterized in that a control strip is heated. 22. Freigeländeüberwachungsanlage nach Anspruch 11, dadurch gekennzeichnet , daß die Mauer (25, 26) beheizbar ist.22. Outdoor area monitoring system according to claim 11, characterized in that the wall (25, 26) is heatable. 23. Freigeländeüberwachungsanlage nach Anspruch 1, dadurch gekennzeichnet , daß die Projektion der Achsen der Aufnahmekegel der Fernsehkameras auf die Geländestreifen mit deren Längsachsen einen spitzen Winkel bilden.23. open-air surveillance system according to claim 1, characterized in that the projection of the axes of the recording cone of the television cameras on the terrain strips with their longitudinal axes form an acute angle.
EP84104425A 1983-05-03 1984-04-18 Open-air ground surveillance apparatus Expired EP0126955B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3316122 1983-05-03
DE19833316122 DE3316122A1 (en) 1983-05-03 1983-05-03 OUTDOOR AREA MONITORING SYSTEM

Publications (2)

Publication Number Publication Date
EP0126955A1 true EP0126955A1 (en) 1984-12-05
EP0126955B1 EP0126955B1 (en) 1987-03-11

Family

ID=6198030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84104425A Expired EP0126955B1 (en) 1983-05-03 1984-04-18 Open-air ground surveillance apparatus

Country Status (2)

Country Link
EP (1) EP0126955B1 (en)
DE (2) DE3316122A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0551175A1 (en) * 1992-01-07 1993-07-14 Oxley Developments Company Limited Video surveillance system
WO2003027977A1 (en) * 2001-09-28 2003-04-03 Wespot Ab (Org No. 556576-5822) Method and system for installation of a monitoring unit
US7302080B2 (en) 2001-09-28 2007-11-27 Secumanagement B.V. System for installation

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4033260C1 (en) * 1990-10-19 1992-01-09 Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De Sensor video column for perimeter protection - houses water-sealed modules for IR transmitter receiver, sensors etc. screwed against sabotage and looking like ordinary post
DE19623524A1 (en) * 1996-06-13 1998-01-02 Pintsch Bamag Ag Monitoring unit for danger area at railway level crossing
DE19744694B4 (en) * 1997-10-10 2013-01-03 Robert Bosch Gmbh Video motion detection device
DE10341426A1 (en) * 2003-09-09 2005-04-14 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Area e.g. railway station platform, monitoring method, monitors defined areas to detect situations which are then classified according to type and location by using video camera signal analysis

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2439102A1 (en) * 1974-08-14 1976-02-26 Siemens Ag Representation of images in form of digital data - involves data containing intensity values and coordinates for recording means
DE2715083B2 (en) * 1977-04-04 1979-02-01 Robert Bosch Gmbh, 7000 Stuttgart System for the discrimination of a video signal
US4249207A (en) * 1979-02-20 1981-02-03 Computing Devices Company Perimeter surveillance system
DE2949580A1 (en) * 1979-12-10 1981-06-11 Siemens AG, 1000 Berlin und 8000 München ARRANGEMENT FOR STORING IMAGES TAKEN BY A SCREENING METHOD

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2439102A1 (en) * 1974-08-14 1976-02-26 Siemens Ag Representation of images in form of digital data - involves data containing intensity values and coordinates for recording means
DE2715083B2 (en) * 1977-04-04 1979-02-01 Robert Bosch Gmbh, 7000 Stuttgart System for the discrimination of a video signal
US4249207A (en) * 1979-02-20 1981-02-03 Computing Devices Company Perimeter surveillance system
DE2949580A1 (en) * 1979-12-10 1981-06-11 Siemens AG, 1000 Berlin und 8000 München ARRANGEMENT FOR STORING IMAGES TAKEN BY A SCREENING METHOD

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
B.B.C. NACHRICHTEN, Band 64, Nr. 3/4, 1982, Mannheim; R. BUCHMÜLLER "Objektschutz zur Lösung von Sicherheitsproblemen", Seiten 108-115 *
IEEE TRANSACTIONS ON NUCLEAR SCIENCE, Band NS-29, Nr. 1, 1982, New York, USA; J.L. SCHOENEMAN "A microprocessor CCTV controller for safeguards applications", Seiten 874-877 *
IEEE TRANSACTIONS ON NUCLEAR SCIENCE, Band NS-29, Nr. 1, 1982, New York, USA; S.T. WEISSMAN "A microcomputer based system for intrusion detection display and assessment", Seiten 869-873 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0551175A1 (en) * 1992-01-07 1993-07-14 Oxley Developments Company Limited Video surveillance system
WO2003027977A1 (en) * 2001-09-28 2003-04-03 Wespot Ab (Org No. 556576-5822) Method and system for installation of a monitoring unit
US7302080B2 (en) 2001-09-28 2007-11-27 Secumanagement B.V. System for installation

Also Published As

Publication number Publication date
EP0126955B1 (en) 1987-03-11
DE3316122A1 (en) 1984-11-08
DE3462636D1 (en) 1987-04-16

Similar Documents

Publication Publication Date Title
DE3634628C2 (en)
EP0986912B1 (en) Method for surveying a predetermined surveillance area
DE19840873A1 (en) Method and device for automatic forest fire detection
DE102009008077A1 (en) Arrangement and method for the detection of heat radiation emitting objects on track bodies
EP2235948B1 (en) Monitoring module for a video monitoring system, method for monitoring the state of a monitored area and computer program
EP0126955B1 (en) Open-air ground surveillance apparatus
AT399239B (en) PASSIVE INFRARED MONITORING SYSTEM
EP3274971B1 (en) Lattice mat for guiding a signal cable
DE3641327C2 (en) Fence detection system
EP1026632B1 (en) image-evaluation system and method
WO2017182119A1 (en) Apparatus, system and method for marking-free slope monitoring and/or construction supervision
WO2020016088A1 (en) Controlling undesirable plants using electrical energy
DE102018104281A1 (en) Monitoring system for object movements and monitoring procedures
DE19744694B4 (en) Video motion detection device
DE2809895A1 (en) SECURITY FENCE FOR CONTAINING PARTICULARLY HAZARDOUS OBJECTS
DE202020101284U1 (en) Alarm device
EP1306824B1 (en) Method for detecting a vehicle moving on a roadway, in particular on a motorway, and for determing vehicle specific data
DE202018107098U1 (en) One-way passage system with a backstop for use in buildings and a corresponding building with such a one-way passage system
WO2010060407A1 (en) Method and device for the nighttime r4ecgnition of fires and differentiation from artificial light sources
DE3706324A1 (en) Device for monitoring an object in the open air
DE60202167T2 (en) Segmented Fresnel lens
DE2952090C2 (en) Optical monitoring system for an outdoor area
DE60204855T2 (en) METHOD AND DEVICE FOR DETECTING FIBERS ON THE BASIS OF IMAGE ANALYSIS
EP0279792B1 (en) Control system in the visible and/or infrared region, especially suitable for fire prevention
AT239685B (en) Capacitive contact threshold for road traffic

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): CH DE FR LI NL SE

17P Request for examination filed

Effective date: 19841009

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR LI NL SE

REF Corresponds to:

Ref document number: 3462636

Country of ref document: DE

Date of ref document: 19870416

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19900425

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19900427

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19900430

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19900724

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19910419

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19910430

Ref country code: CH

Effective date: 19910430

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19910626

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19911101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19911230

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19930101

EUG Se: european patent has lapsed

Ref document number: 84104425.8

Effective date: 19911108