WO2004028288A2 - Three dimensional gemstone-imaging system and method - Google Patents

Three dimensional gemstone-imaging system and method Download PDF

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Publication number
WO2004028288A2
WO2004028288A2 PCT/IL2003/000762 IL0300762W WO2004028288A2 WO 2004028288 A2 WO2004028288 A2 WO 2004028288A2 IL 0300762 W IL0300762 W IL 0300762W WO 2004028288 A2 WO2004028288 A2 WO 2004028288A2
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WO
WIPO (PCT)
Prior art keywords
gemstone
imaging
imaging system
rotational displacement
camera
Prior art date
Application number
PCT/IL2003/000762
Other languages
French (fr)
Other versions
WO2004028288A3 (en
Inventor
Zvi Porat
Original Assignee
Dialit Ltd.
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 Dialit Ltd. filed Critical Dialit Ltd.
Priority to AU2003264843A priority Critical patent/AU2003264843A1/en
Publication of WO2004028288A2 publication Critical patent/WO2004028288A2/en
Publication of WO2004028288A3 publication Critical patent/WO2004028288A3/en

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84Systems specially adapted for particular applications
    • G01N21/87Investigating jewels

Definitions

  • the present invention is of a gemstone imaging system and method of
  • the present invention is utilized in the processing of
  • Diamonds are employed in a wide-range of applications due to their
  • the characteristic properties include
  • Diamond is the hardest known substance. In addition, diamonds
  • Diamonds exhibit low friction and wear properties, are chemically
  • the uses of diamonds include, use
  • a method commonly used uses an image of the diamond.
  • the image of the diamond can be produced by an electronic camera
  • the diamond can then be viewed on the computer.
  • the gemstone is photographed approximately at 5-degree intervals,
  • the images are used to create a three dimensional picture of
  • the present invention is of a gemstone imaging system. Moreover the present invention is of a gemstone imaging system. Moreover the present invention is of a gemstone imaging system. Moreover the
  • present invention is of a gemstone imaging system for use in the processing
  • invention provides methods of use of the gemstone imaging system.
  • the gemstone imaging system Preferably
  • the present invention is utilized in the processing of diamonds.
  • a camera device including at least one imaging device
  • said camera device configured to producing continuous images of the gemstone; (b) a gemstone securing means for securing said gemstone; (c) a
  • one imaging device (d) a device for producing a high level of illumination
  • imaging a gemstone including the steps of (a) providing a gemstone imaging
  • a camera device including at least one imaging device
  • imaging system including: (a) a camera device including at least one imaging
  • said camera device configured to producing continuous images of the
  • the gemstone imaging system further includes a device
  • the device for producing is configured to produce high level of illumination.
  • the device for producing is configured to produce high level of illumination.
  • high level of illumination is a strobe.
  • imaging system for imaging a gemstone including: (a) a camera device
  • said camera device configured to:
  • processing unit for viewing said gemstone.
  • a camera device including at least one imaging device
  • said camera device configured to producing continuous images of the
  • imaging device (d) a device for producing high level of illumination; and (e)
  • imaging system for use in gemstone processing system including: (a) a camera device including at least one imaging device, said camera device configured to
  • imaging system for contour and internal imaging including: (a) a camera device
  • said camera device configured to:
  • the processing unit for viewing said gemstone.
  • the elongated aperture Preferably, the elongated aperture
  • the gemstone is a diamond.
  • the camera device is a video camera.
  • illumination is synchronized with the shutter of said camera.
  • illumination is a strobe.
  • the strobe flickers every about 25
  • the computer processing unit includes (a) a
  • driver connected to said camera;
  • frame grabber connected at one end to said driver and at a second distal end to said computer;
  • the stone may be rough and unprocessed or
  • imaging' as used herein includes, but is not limited to,
  • reproduction of an object which includes but is not limited to photographing or
  • an imaging device such as a lens system, which is capable of producing an image.
  • the camera device may be any suitable type of camera.
  • the camera may be any suitable type of camera.
  • the camera may be any suitable type of camera.
  • the camera may be any suitable type of camera.
  • the camera may be any suitable type of camera.
  • the camera may be any suitable type of camera.
  • the camera may be any suitable type of camera.
  • the camera may be any suitable type of camera.
  • the camera may be any suitable type of camera.
  • the camera may be any suitable type of camera.
  • the camera may be any suitable type of camera.
  • the camera may be any suitable type of camera.
  • the camera may be any suitable type of camera.
  • the camera may be any suitable type of camera.
  • the device is an electronic camera or a CCD camera.
  • imaging device' as used herein includes, but is not limited to,
  • transmitted light and form optical images such as a lens system.
  • FIG. 1 shows a schematic block diagram of the system of the present
  • the present invention provides a gemstone imaging system comprising:
  • a camera device including at least one imaging device configured to:
  • the present invention provides a method of imaging a
  • a camera device including at least one imaging device for
  • the gemstone imaging system and method of the present invention have
  • Gemstone processing includes,
  • present invention is utilized in the processing of diamonds.
  • gemstones In gemstone
  • angle of contact are several ofthe parameters to be determined.
  • system of the present invention can be used to efficiently exatnine a "polished" stone for the purpose
  • An accurate, efficient imaging system such as
  • the system of the present invention optionally comprises a camera
  • the camera device consists of substantially any suitable type
  • optical device comprising an imaging device, such as, but not limited to, a
  • the camera device may be any suitable type of
  • the camera device is an electronic camera. More preferably,
  • the camera is a digital camera. Most preferably, the camera is a digital video
  • the camera device is optionally made from any suitable material.
  • the gemstone is optionally secured by a securing means, such as a
  • the securing means is fully rotateable. As such, the securing
  • means is configured to rotationally displace the gemstone 360 degrees.
  • the gemstone is rotated 180 degrees.
  • the securing means
  • a suitable opening such as but not limited to a vertical and/or
  • the opening is a slit.
  • the securing means is optionally made from
  • any suitable material such as, but not limited to, metal, stainless steel, titanium
  • the system of the present invention optionally includes an instrument
  • a high level of illumination such as, but not limited to, a strobe.
  • strobe as used herein includes but is not limited to a device, which produces an
  • the strobe ofthe present invention optionally flickers substantially every 25 milliseconds.
  • illumination is preferably set from substantially 1 microsecond to 700
  • the system of the present invention thus preferably produces one full
  • the strobe does not result in white markings
  • the processing unit ofthe present invention optionally includes a driver
  • micro-controller The system of the present invention optionally functions as
  • the gemstone is secured by a rotateable securing means.
  • the gemstone is rotated about 180 degrees.
  • strobe optionally flickers every 25 milliseconds and the camera continually
  • the system of the present invention preferably uses a video
  • the system films a movie of x seconds duration.
  • the gemstone completes at least a 180 degrees rotational displacement.
  • imaging software creates a three dimensional
  • the system of the . present invention further includes a
  • the camera device is connected to a driver.
  • the driver is a means of
  • the driver is connected to the frame
  • the frame grabber takes the data from the picture frame of pixels and
  • the frame grabber is preferably operated under
  • a positional log is electronically is created by a micro ⁇
  • micro-controller such that the micro-controller generates a series of positional
  • each image receives a positional index for readily enabling creation of a
  • the software of the present invention optionally controls the rotational
  • the system of the present invention provides a system for viewing the
  • the system of the present invention also relates to the exterior surface of the gemstone.
  • the present invention further provides a system, which can be
  • invention provides a means for orientation and determining of parameters used
  • Figure 1 shows a schematic block diagram of the imaging system ofthe
  • a gemstone 12 such as a
  • diamond 12 is held by any suitable securing means 14, which securing means
  • the means for rotation of the gemstone 16 may optionally be manually
  • suitable manual rotation means such as, but not limited to, a joystick.
  • the automatic rotation may optionally be effected by way of an algorithm.
  • the rotation ofthe gemstone 12 is automatically operated.
  • Securing means 14 is preferably configured to rotationally displace
  • gemstone 12 from substantially about zero degrees to about 360 degrees.
  • gemstone 12 is rotationally displaced about 180 degrees.
  • the securing device 14 of the present invention includes a
  • Securing means 14 is optionally made from any suitable material, such as
  • securing means 14 includes a vacuum securing capability
  • System 10 further includes a camera device 20, for imaging the
  • camera device 20 may be any suitable type of camera.
  • camera device 20 is an electronic camera 20. More preferably,
  • camera device 20 is a digital video camera 20.
  • camera device 20 is configured to .function and continually photograph
  • the imaging system of the present invention 10 includes an
  • illumination source 24 such as, but not limited to, a strobe 24.
  • a strobe 24 a strobe 24.
  • the imaging system of the present invention 10 may be
  • camera device 20 is synchronized by an imaging software
  • the imaging system of the present invention further includes a
  • Processing unit 40 of the present invention optionally
  • a driver 26 includes a driver 26, a frame grabber 28 and a PC computational device 30.
  • system of the present invention 10 further includes an
  • embedded micro-controller 32 for controlling illuminations increments
  • activity relating to the system including but not limited to, activating and
  • the imaging system of the present invention 10 optionally functions as
  • gemstone 12 is preferably secured by a rotateable securing means 14.
  • Gemstone 12 is rotationally displaced- optionally about 360 degrees or any
  • gemstone 12 is rotationally
  • Strobe 24 preferably flickers substantially about
  • camera 20 preferably creates an image of gemstone 12 every
  • the imaging system of the present invention 10 preferably uses a
  • video system and a means of transferring video data such as, but not limited to,
  • Frame grabber 28 of the present invention works by
  • camera device 20 can be any suitable imaging system
  • camera device 20 is connected to a driver 26 for linking
  • frame grabber 28 takes imaging data from the picture frame
  • frame grabber 28 is
  • micro-controller 32 preferably compensates for strobe 24 providing intermittent
  • the imaging system of the present invention 10 provides a system for
  • imaging system of the present invention 10 also provides a means of viewing obscured portions of gemstone 12, preferably via vertical and/or longitudinal
  • the present invention further provides for an imaging system 10 for
  • processing system such as, but not limited to, a
  • gemstone processing such as polishing
  • the imaging system of the present invention has been employed in a
  • the angle setting system can serve an automatic
  • polishing so that the final stone will comply with the following requirements of polishing angles within a defined boundary, maximizing of the yield and
  • the diamond was rotated 180 degrees and a strobe
  • the imaging system of the present invention has been employed in a
  • the properties measuring system can be any suitable material.
  • a diamond was placed inverted and secured by a vacuum in the securing
  • measurements such as, angles, diameters, heights and size.

Abstract

The present invention is of a gemstone imaging system (10) and method of use of the system in the measurement and defining of processing parameters of gemstones including at least one imaging device (20), said at least one imaging device configured to produce continuous images of the gemstone (12); a gemstone securing means for securing said gemstone ; a gemstone rotational displacement element, attached to said gemstone securing means for rotational displacement of said gemstone in relation to the said at least one imaging device.

Description

THREE DIMENSIONAL GEMSTONETMAGING SYSTEM AND METHOD
FIELD OF THE INVENTION
The present invention is of a gemstone imaging system and method of
use ofthe system in the measurement and defining of processing parameters of
gemstones. Preferably, the present invention is utilized in the processing of
diamonds.
BACKGROUND OF THE INVENTION
Diamonds are employed in a wide-range of applications due to their
unique physical and chemical properties. The characteristic properties include
the following. Diamond is the hardest known substance. In addition, diamonds
have the highest atomic density and the highest thermal conductivity at room
temperature. Diamonds exhibit low friction and wear properties, are chemically
inert and are wide-band gap semiconductors. The uses of diamonds include, use
in cutting tools, use in high power electronic devices, use in low friction and
wear, surfaces, components for electronic devices and gemstones used for
jewelry purposes.
Most uses of diamonds require processing such as shaping and polishing
of the diamond surface in order to produce smooth surfaces of varying degrees
depending on the desired application. In order to execute various measurements
or processing of diamonds, such as angle setting, measuring diamond diameter
and defining polishing angle, a method commonly used uses an image of the diamond. The image of the diamond can be produced by an electronic camera
system, which is connected to a computer and relevant processing software
package. The diamond can then be viewed on the computer.
The gemstone imaging systems of the background art include systems
whereby a diamond is held by a gemstone holder, which holder rotates the
diamond up to 360 degrees. The imaging in the background art is not
continuous and only one half of the diamond is usually photographed at one
session. The gemstone is photographed approximately at 5-degree intervals,
resulting in about thirty-six images for both halves of a gemstone, taking about
15 to 30 seconds. The images are used to create a three dimensional picture of
the gemstone. The system works by use of sequential repeat commands such as
(1) take a picture; (2) rotate 5 degrees; and (3) stop; and repeating these
commands until the diamond has rotated 180 degrees. The background art
describe systems, which employ a camera with a fixed lighted background,
wherein the gemstone is fixated periodically, for the purpose of single frame
photography.
This latent deficiency is further exacerbated by the nature of rotational
displacement including at least four subcomponents of acceleration, fixed speed
rotation, deceleration and fixation.
In the prior art systems, due to varying centripetal and centrifugal forces
in acceleration and deceleration, the rate of acceleration and deceleration need
to be mitigated for the purpose of preventing inadvertent misalignment of the
diamond relative to the diamond holder. Thus, the prior art system and process is relatively slow and the imaging
and gemstone rotational displacement must be synchronized, hindering the
number of pictures capability in a given time frame for the system of the prior
art.
In addition, the lighted background suffers from various types of
reflections, which may cause distortions in the images. By way of example
only, a common optical distortion of the systems of the background art is
manifested by large white areas on images ofthe gemstone.
There is therefore a need for a device, system and method, such as is
disclosed in the present invention, to provide a solution to the aforementioned
problems and for providing more efficient gemstone imaging devices, systems
and methods for use in the processing and measurement and defining of
processing parameters of gemstones.
SUMMARY OF THE INVENTION
The present invention is of a gemstone imaging system. Moreover the
present invention is of a gemstone imaging system for use in the processing and
determining of processing parameters of gemstones. Furthermore, the present
invention provides methods of use of the gemstone imaging system. Preferably
the present invention is utilized in the processing of diamonds.
In a first embodiment the present invention provides a gemstone imaging
system including: (a) a camera device including at least one imaging device,
said camera device configured to producing continuous images of the gemstone; (b) a gemstone securing means for securing said gemstone; (c) a
gemstone rotational displacement element, attached to said gemstone securing
means, for rotational displacement of said gemstone in relation to said at least
one imaging device; (d) a device for producing a high level of illumination; and
(e) computer processing unit for viewing said gemstone.
In a second embodiment the present invention provides a method of
imaging a gemstone including the steps of (a) providing a gemstone imaging
system including (i) a camera device including at least one imaging device, said
camera device configured to producing continuous images of the gemstone; (ii)
a gemstone securing means for securing said gemstone; (iii) a gemstone
rotational displacement element, attached to said gemstone securing means, for
rotational displacement of said gemstone in relation to said at least one imaging
device; (iv) a device for producing a high level of illumination; and (v)
computer processing unit for viewing said gemstone; (b) providing a gemstone
to be secured in said gemstone imaging system by said gemstone securing
means; and (c) imaging said gemstone onto said computer with said provided
system.
In a third embodiment the present invention provides a gemstone
imaging system including: (a) a camera device including at least one imaging
device, said camera device configured to producing continuous images of the
gemstone; (b) a gemstone securing means for securing said gemstone; (c) a
gemstone rotational displacement element, attached to said gemstone securing
means, for rotational displacement of said gemstone in relation to said at least one imaging device; and (d) computer processing unit for viewing said
gemstone. Preferably, the gemstone imaging system further includes a device
for producing high level of illumination. Preferably, the device for producing
high level of illumination is a strobe.
In a fourth embodiment the present invention provides a gemstone
imaging system for imaging a gemstone including: (a) a camera device
including at least one imaging device, said camera device configured to
producing continuous images of the gemstone; (b) a gemstone securing means
for securing said gemstone; (c) a gemstone rotational displacement element,
attached to said gemstone securing means, for rotationally displacing said
gemstone in relation to said at least one imaging device; (d) a device for
producing high level of illumination; (e) a gemstone; and (f) computer
processing unit for viewing said gemstone.
In a fifth embodiment the present invention provides a diamond imaging
system including: (a) a camera device including at least one imaging device,
said camera device configured to producing continuous images of the
gemstone; (b) a gemstone securing means for securing said gemstone; (c) a
gemstone rotational displacement element, attached to said gemstone securing
means, for rotationally displacing said gemstone in relation to said at least one
imaging device; (d) a device for producing high level of illumination; and (e)
computer processing unit for viewing said gemstone.
In a sixth embodiment the present invention provides a gemstone
imaging system for use in gemstone processing system including: (a) a camera device including at least one imaging device, said camera device configured to
producing continuous images of the gemstone; (b) a gemstone securing means
for securing said gemstone; (c) a gemstone rotational displacement element,
attached to said gemstone securing means, for rotationally displacing said
gemstone in relation to said at least one imaging device; (d) a device for
producing high level of illumination; (e) computer processing unit for viewing
said gemstone; and (f) a gemstone processing system, including computer
software conformed to perform gemstone processing.
In a seventh embodiment the present invention provides a gemstone
imaging system for contour and internal imaging including: (a) a camera device
including at least one imaging device, said camera device configured to
producing continuous images of the gemstone; (b) a gemstone securing means
for securing said gemstone including an elongated aperture; (c) a gemstone
rotational displacement element, attached to said gemstone securing means, for
rotationally displacing said gemstone in relation to said at least one imaging
device; (d) a device for producing high level of illumination; and (e) computer
processing unit for viewing said gemstone. Preferably, the elongated aperture
provides a means of internal imaging of said gemstone.
In a preferred embodiment the gemstone rotational displacement element
is manually operated.
In a preferred embodiment the gemstone rotational displacement element
is automatically operated. In a preferred embodiment the gemstone rotational displacement element
rotationally displaces said gemstone from substantially about 0 degrees to
substantially about 360 degrees.
In a preferred embodiment the gemstone rotational displacement element
rotationally displaces said gemstone substantially about 180 degrees.
In a preferred embodiment the gemstone is a diamond.
In a preferred embodiment the camera device is a video camera.
In a preferred embodiment the at least one imaging device is selected
from the group consisting of concave, convex, non-zoom and zoom lenses and
a combination thereof.
In a preferred embodiment the gemstone securing means further includes
an elongated aperture.
In a preferred embodiment the device for producing a high level of
illumination is synchronized with the shutter of said camera.
In a preferred embodiment the device for producing a high level of
illumination is a strobe.
In a preferred embodiment the strobe flickers every about 25
milliseconds.
In a preferred embodiment the time of illumination of said strobe is from
substantially about 1 microsecond to substantially about 700 microseconds.
In a preferred embodiment the computer processing unit includes (a) a
driver connected to said camera; (b) a frame grabber connected at one end to said driver and at a second distal end to said computer; (c) a PC computational
device; and (d) an embedded micro-controller.
In a preferred embodiment the computer-processing unit includes a
means of transferring video data.
In a preferred embodiment the means of transferring video data is set by
CCIR.
In a preferred embodiment the computer processing unit further includes
software configured to convert resulting images of said gemstone into a three
dimensional image.
In a preferred embodiment of the method the step of imaging said
gemstone is continuous imaging.
The term 'gemstone' as used herein includes, but is not limited to, any
precious or semi-precious stone. The stone may be rough and unprocessed or
semi-processed or a finished refined, processed stone. Preferably the gemstone
is a diamond, however wherever the term 'diamond' is used in the
specification, it is intended that any suitable gemstone may be used.
The term 'imaging' as used herein includes, but is not limited to,
producing any suitable copy of the sample, such as an optically formed
reproduction of an object, which includes but is not limited to photographing or
any suitable projection on any suitable screen.
The term 'camera device' as used herein shall include, but will not be
limited to, any photographic device with an aperture controlled by a shutter that
opens to admit light or any suitable type of optical device comprising an imaging device, such as a lens system, which is capable of producing an image.
The camera device may be any suitable type of camera. Preferably, the camera
device is an electronic camera or a CCD camera.
The term 'imaging device' as used herein includes, but is not limited to,
5 any device which is capable of producing an image, such as, but not limited to,
a piece of glass or other transparent material, used to converge or diverge
transmitted light and form optical images, such as a lens system.
The term 'shutter speed' as used herein includes, but is not limited to,
the time it takes for a shield in a camera device, when tripped, to admit light to
l o expose the film or plate.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a schematic block diagram of the system of the present
invention.
15
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention provides a gemstone imaging system comprising:
(a) a camera device including at least one imaging device configured to
producing continuous images of the gemstone; (b) a gemstone securing means
20 for securing the gemstone; (c) a gemstone rotational displacement element,
attached to the gemstone securing means, for rotationally displacing the
gemstone in relation to the at least one imaging device; (d) a device for producing high levels of illumination;- and (e) computer processing unit for
viewing the gemstone.
Furthermore, the present invention provides a method of imaging a
gemstone comprising the steps of (a) providing a gemstone imaging system
comprising (i) a camera device including at least one imaging device for
producing images ofthe gemstone; (ii) a gemstone securing means for securing
the gemstone; (iii) a gemstone rotational displacement element, attached to the
gemstone securing means, for rotationally displacing the gemstone in relation to
the at least one imaging device; (iv) a means for producing high levels of
illumination; and (v) computer processing unit for viewing the gemstone; (b)
providing a gemstone to be secured in the gemstone imaging system by the
gemstone securing means; and (c) imaging the gemstone and storing the image
in a computational device with the provided system.
The gemstone imaging system and method of the present invention have
a wide use in the processing and more specifically in the measuring and
defining of physical properties of gemstones. Gemstone processing includes,
but is not limited to cutting, polishing and fine polishing. Preferably, the
present invention is utilized in the processing of diamonds. In gemstone
processing, the orientation ofthe stone, choice of cut, first point of contact and
angle of contact are several ofthe parameters to be determined.
By way of example only, the system ofthe present invention can be used
to efficiently examine a "rough" gemstone for the purpose of determining any
and all parameters of processing. Furthermore, the system of the present invention can be used to efficiently exatnine a "polished" stone for the purpose
of determining the properties and value of a gemstone. Further still, the system
ofthe present invention can be used in any stage between a "rough" stone and a
"polished stone to efficiently evaluate the preceding and proceeding processes
and polishing of the gemstone. An accurate, efficient imaging system such as
provided in the present invention greatly improves the determination of such
parameters.
The system of the present invention optionally comprises a camera
device, an instrument producing high levels of intermittent illumination, a
gemstone holder, imaging software and imaging processing unit.
Optionally, the camera device consists of substantially any suitable type
of optical device comprising an imaging device, such as, but not limited to, a
lens system, wherein the system of the present invention is capable of
producing and storing an image. The camera device may be any suitable type of
camera or photographic, or imaging device.
Preferably, the camera device is an electronic camera. More preferably,
the camera is a digital camera. Most preferably, the camera is a digital video
camera. The camera device is optionally made from any suitable material.
The gemstone is optionally secured by a securing means, such as a
holder. Preferably, the securing means is fully rotateable. As such, the securing
means is configured to rotationally displace the gemstone 360 degrees.
Preferably, the gemstone is rotated 180 degrees. The securing means
described in the background art are manually or partially manually 360 degrees
π rotateable. A latent deficiency of the background art is that the imaging is not
continuous and only one half of the diamond is usually photographed at one
time.
In a preferred embodiment the securing means of the present invention
includes a suitable opening such as but not limited to a vertical and/or
longitudinal elongated aperture, for readily imaging the entirety of the
gemstone, without imaging ofthe securing device.
Preferably, the opening is a slit. A latent deficiency of the securing
devices ofthe background art is that they are incapable of imaging ofthe whole
gemstone without imaging ofthe securing device.
Often, due to displacement increments of the prior art systems being
approximately 5 degrees, providing gemstone holders with large slits impairs
the stability ofthe gemstone in the holder. Alternatively, using standard holders
with small apertures in systems ofthe prior art will invariably fail to produce an
image of the portions obscured by the holder due to the large angular
increments between photographs. The securing means is optionally made from
any suitable material, such as, but not limited to, metal, stainless steel, titanium
and the like.
The system of the present invention optionally includes an instrument
producing a high level of illumination, such as, but not limited to, a strobe. A
strobe as used herein includes but is not limited to a device, which produces an
intense flashing light synchronized with the shutter of a camera such that a
series of photographs can be taken of a moving object. The strobe ofthe present invention optionally flickers substantially every 25 milliseconds. The time of
illumination is preferably set from substantially 1 microsecond to 700
microseconds.
The system of the present invention thus preferably produces one full
180 degrees rotation of the gemstone with the strobe flickering, in about 4
seconds. It is envisioned that the system of the present invention may be
employed to achieve any suitable shutter speed. The systems ofthe background
art employ a background light. According to the teachings of the prior art, the
background lighting requires rotational displacement ofthe gemstone to a fixed
point. Thereafter, a photo is taken by a fixed camera wherein rotational
displacement of the gemstone and the camera activation must be synchronized,
which hinders the number of pictures capability of the system which results in
systems of the background art taking about 15 seconds to complete a 360
degrees rotation.
Furthermore, image resolution suffers markedly from the reduced
number of photos taken relative to the time frame. It is not uncommon in prior
art systems that subsequently to an initial imaging rotation, the systems adds a
second imaging rotation session due to lack of clarity of images or low
resolution requiring improvement.
In addition, the system of the prior art can suffer from problems such as
reflections, which are manifested by large white areas on images of the
gemstone. Thus, the system of the present- invention has the advantage of readily
producing over three times the number of images compared to the systems of
the background art. Furthermore, the strobe does not result in white markings
on the images.
The processing unit ofthe present invention optionally includes a driver,
a frame grabber, a PC with a Windows™ operating system and an embedded
micro-controller. The system of the present invention optionally functions as
follows. The gemstone is secured by a rotateable securing means. The
gemstone is rotateably displaced optionally substantially 360 degrees or any
suitable rotation. Preferably the gemstone is rotated about 180 degrees. The
strobe optionally flickers every 25 milliseconds and the camera continually
takes a picture. The system of the present invention preferably uses a video
system and a means of transferring video data, such as, but not limited to, that
set by a CCIR.
The system films a movie of x seconds duration. The strobe flickers
every y milliseconds, for a duration of time of z microseconds. During the x
seconds, the gemstone completes at least a 180 degrees rotational displacement.
Thus, using the frame grabber the images are grabbed and stored using a
suitable command. Preferably, imaging software creates a three dimensional
image within the same time frame. The frame grabber of the present invention
optionally works by imaging the even lines substantially every 25 milliseconds
and then afterwards the uneven lines. Preferably, the system of the . present invention further includes a
positional log for providing a log of angular displacement of the gemstone
during illuminations.
As such, substantially every 25 milliseconds the system images a
different portion of the gemstone at a differing angular displacement.
Preferably, the camera device is connected to a driver. The driver is a means of
linking the camera to the computer. The driver is connected to the frame
grabber. The frame grabber takes the data from the picture frame of pixels and
stores it as a digital image. The frame grabber is preferably operated under
Windows™ operating system and an embedded micro-controller for controlling
angular displacement and strobe illumination increments and illuminations
duration.
Preferably, a positional log is electronically is created by a micro¬
controller, such that the micro-controller generates a series of positional
indexes during illumination, thereby readily providing a log of angular
displacement of said gemstone during illuminations. Thereafter, the positional
log is transferred to the computational device attached to the micro-controller.
Thus, each image receives a positional index for readily enabling creation of a
three dimensional image ofthe gemstone.
The software of the present invention optionally controls the rotational
displacement and programs filters and delays. In addition the system optionally
compensates for strobe flashing. The system of the present invention provides a system for viewing the
exterior surface of the gemstone. The system of the present invention also
provides a means of viewing inside the gemstone, preferably via the vertical
and/or longitudinal elongated aperture in the gemstone securing means.
The present invention further provides a system, which can be
incorporated into any suitable existing automatic gemstone treatment or
processing system, such as, but not limited, to a polishing machine. The image
of the diamond produced by the system, apparatus and method of the present
invention provides a means for orientation and determining of parameters used
in gemstone processing, such as polishing.
The imaging system and method of the present invention therefore
provides a system and method that overcome the outlined disadvantages of the
imaging systems available in the art.
The principles and operation of systems according to the present
invention may be better understood with reference to the figures. The figures
show one embodiment ofthe present invention and are not limiting.
Figure 1 shows a schematic block diagram of the imaging system ofthe
present invention 10. As can be seen in Figure 1, a gemstone 12, such as a
diamond 12 is held by any suitable securing means 14, which securing means
14 comprises a means for readily rotational displacement 16 of the gemstone
12.
The means for rotation of the gemstone 16 may optionally be manually
operated or automatically operated or a combination thereof. As used herein, the term 'automatically operated' includes automatically and semi-
automatically operated. Optionally, manual rotation may be achieved using any
suitable manual rotation means, such as, but not limited to, a joystick. In an
embodiment wherein the rotation ofthe gemstone 16 is automatically operated,
the automatic rotation may optionally be effected by way of an algorithm.
Preferably, the rotation ofthe gemstone 12 is automatically operated.
Securing means 14 is preferably configured to rotationally displace
gemstone 12 from substantially about zero degrees to about 360 degrees.
Preferably, gemstone 12 is rotationally displaced about 180 degrees.
Optionally, the securing device 14 of the present invention includes a
vertical and/or longitudinal elongated aperture 18, for readily enabling imaging
ofthe entirety of gemstone 12, without imaging ofthe securing means 14.
Securing means 14 is optionally made from any suitable material, such
as, but not limited to, metal, titanium, stainless steel and the like.
Alternatively, securing means 14 includes a vacuum securing capability
for securing a gemstone using a vacuum.
System 10 further includes a camera device 20, for imaging the
gemstone 12. Optionally, camera device 20 may be any suitable type of camera.
Preferably, camera device 20 is an electronic camera 20. More preferably,
camera device 20 is a digital video camera 20. Camera device 20 ofthe present
embodiment preferably includes a video system and a means of transferring
video data, such as, but not limited to, that set by a CCIR 22. Preferably, camera device 20 is configured to .function and continually photograph
gemstone 12.
Optionally, the imaging system of the present invention 10 includes an
illumination source 24, such as, but not limited to, a strobe 24. Preferably,
strobe 24 flickers about every 25 milliseconds. The time of illumination is
preferably from about 1 microsecond to about 700 microseconds. The imaging
system of the present invention 10 thus results in half of a full 360 degrees
rotation of the gemstone 12 with strobe 24 flickering, in about 4 seconds. It is
envisioned that the imaging system of the present invention 10 may be
employed to achieve any suitable shutter speed.
Preferably, camera device 20 is synchronized by an imaging software
25. Alternatively a synchronizing cable, for synchronizing strobe 24 and
camera 20 can be utilized.
The imaging system of the present invention further includes a
processing unit 40. Processing unit 40 of the present invention optionally
includes a driver 26, a frame grabber 28 and a PC computational device 30.
Preferably, the system of the present invention 10 further includes an
embedded micro-controller 32 for controlling illuminations increments and
duration of strobe, rotational displacement of gemstone 12 and any other
activity relating to the system, including but not limited to, activating and
deactivating securing means 14.
The imaging system of the present invention 10 optionally functions as
follows: gemstone 12 is preferably secured by a rotateable securing means 14. Gemstone 12 is rotationally displaced- optionally about 360 degrees or any
suitable rotational displacement. Preferably, gemstone 12 is rotationally
displaced about 180 degrees. Strobe 24 preferably flickers substantially about
every 25 milliseconds for a period of substantially 1 millisecond to 700
milliseconds and camera 20 preferably creates an image of gemstone 12 every
illumination. The imaging system of the present invention 10 preferably uses a
video system and a means of transferring video data such as, but not limited to,
that set by CCIR 22. Frame grabber 28 of the present invention works by
imaging even lines every 25 milliseconds and then the odd lines.
Alternatively, camera device 20 can be any suitable imaging system
capable of producing continues imagery for a duration of at least 4 seconds.
Preferably, camera device 20 is connected to a driver 26 for linking
camera 20 to the computer 40 such that driver 26 is connected to frame grabber
28.
Preferably, frame grabber 28 takes imaging data from the picture frame
of pixels and stores the data as a digital image. Optionally, frame grabber 28 is
operated by a PC computational device 30. Embedded micro-controller 32
optionally controls the rotation and programs filters and delays. In addition,
micro-controller 32 preferably compensates for strobe 24 providing intermittent
illumination.
The imaging system of the present invention 10 provides a system for
viewing the contour 34 of gemstone 12. In an alternative embodiment the
imaging system of the present invention 10 also provides a means of viewing obscured portions of gemstone 12, preferably via vertical and/or longitudinal
elongated aperture 18 in gemstone securing means 14.
The present invention further provides for an imaging system 10 for
being incorporated into any suitable existing automatic gemstone treatment or
processing system (not shown in figure 1), such as, but not limited to, a
polishing machine, a bruting machine or sawing machine. The image of
diamond 12 resulting from the apparatus and method of the present invention
provides a means of orientation and determining of parameters used in
gemstone processing, such as polishing.
It is to be understood that the invention is not limited in its application to
the details of construction and the arrangement of the components set forth in
the description. The invention includes other embodiments and can be practiced
or implemented in various ways. Also, it is to be understood that the
phraseology and terminology employed herein is for the purpose of description
only and should not be regarded as limiting.
The present invention may be better understood with reference to the
examples and the accompanying description.
Example 1
The imaging system of the present invention has been employed in a
diamond angle setting system. The angle setting system can serve an automatic
gemstone polishing machine and functions to enable a precise setting of the
polishing so that the final stone will comply with the following requirements of polishing angles within a defined boundary, maximizing of the yield and
leaving naturals within a defined boundary.
.. A diamond was placed and held in the securing means of the system of
the present invention. The diamond was rotated 180 degrees and a strobe
flashed every 25 milliseconds. The video camera continually took a picture
every illumination of the illumination element. A 3 dimensional image of the
diamond was obtained from the plurality of single images taken every 25
milliseconds and viewed on the screen of the computer, which contained the
software for the angle setting system. Consequently, the angle setting system
used the produced image to analyze the sample diamond and to determine the
diamond's angle size and measure diameter of the diamond. These parameters
were then used to polish the sample diamond.
Example 2
The imaging system of the present invention has been employed in a
diamond properties measuring system. The properties measuring system can
serve any evaluation process.
A diamond was placed inverted and secured by a vacuum in the securing
means of the system of the present invention. The diamond was rotated 360
degrees and a strobe flashed every 25 milliseconds. The video camera
continually took a picture every illumination of the illumination element. A 3
dimensional image of the diamond was obtained from the plurality of single
images taken every 25 milliseconds and viewed on the screen of the computer,
which contained the software for the properties measuring system. Consequently, the properties measuring system used the produced image
to analyze the sample diamond and to determine the diamond's properties and
measurements such as, angles, diameters, heights and size.
While the invention has been described with respect to a limited number
of embodiments, it will be appreciated that many variations, modifications and
other applications ofthe invention may be made.

Claims

What is claimed is:
1. A gemstone imaging system comprising:
(a) a camera device including at least one imaging device, said
camera device configured to producing continuous images
ofthe gemstone;
(b) a gemstone securing means for securing said gemstone;
(c) a gemstone rotational displacement element, attached to
said gemstone securing means, for rotational displacement
of said gemstone in relation to said at least one imaging
device;
(d) a device for producing a high level of illumination; and
(e) computer processing unit for viewing said gemstone.
2. The gemstone imaging system of claim 1, wherein said gemstone
rotational displacement element is manually operated.
3. The gemstone imaging system of claim 1, wherein said gemstone
rotational displacement element is automatically operated.
4. The gemstone imaging system of claim 1, wherein said gemstone
rotational displacement element rotationally displaces said
gemstone from substantially 0 degrees to 360 degrees.
5. The gemstone imaging system of claim 1, wherein said gemstone
rotational displacement element rotationally displaces said
gemstone substantially about 180 degrees.
6. The gemstone imaging system of claim 1, wherein said gemstone
is a diamond.
7. The gemstone imaging system of claim 1, wherein said camera
device is a video camera.
8. The gemstone imaging system of claim 1, wherein said at least
one imaging device is selected from the group consisting of
concave, convex, non-zoom and zoom lenses and a combination
thereof.
9. The gemstone imaging system of claim 1, wherein said gemstone
securing means further comprises an elongated aperture.
10. The gemstone imaging system of claim 1, wherein said device for
producing a high level of illumination is synchronized with the
shutter of said camera.
11. The gemstone imaging system of claim 1, wherein said device for
producing a high level of illumination is a strobe.
12. The gemstone imaging system of claim 11, wherein said strobe
flickers every about 25 milliseconds.
13. The gemstone imaging system of claim 11, wherein said time of
illumination of said strobe is from substantially 1 microsecond to
700 microseconds.
14. The gemstone imaging system of claim 1, wherein said computer
processing unit comprises
(a) a driver connected to said camera;
(b) a frame grabber connected at one end to said driver and at
a second distal end to said computer;
(c) PC computational device; and
15. The gemstone imaging system of claim 1, wherein said computer
processing unit comprises a means of transferring video data.
16. The gemstone imaging system of claim 1, wherein said means of
transferring video data is set by a CCIR.
17. The gemstone imaging system of claim 1, wherein said computer
processing unit further comprises software configured to convert
resulting images of said gemstone into a three dimensional image.
18. A method of imaging a gemstone comprising the steps of
(a) providing a gemstone imaging system comprising
(i) a camera device including at least one imaging
device, said camera device configured to producing
continuous images ofthe gemstone;
(ii) a gemstone securing means for securing said
gemstone;
(iii) a gemstone rotational displacement element,
attached to said gemstone securing means, for
rotational displacement of said gemstone in relation
to said at least one imaging device;
(iv) a device for producing a high level of illumination;
and
(v) computer processing unit for viewing said
gemstone;
(b) providing a gemstone to be secured in said gemstone
imaging system by said gemstone securing means; and
(c) imaging said gemstone onto said computer with said
provided system.
19. The method of claim 18, wherein said gemstone rotational
displacement element is manually operated.
20. The method of claim 18, wherein said gemstone rotational
displacement element is automatically operated.
21. The method of claim 18, wherein said gemstone rotational
displacement element rotationally displaces said gemstone from
substantially 0 degrees to 360 degrees.
22. The method of claim 18, wherein said gemstone rotational
displacement element rotates said gemstone about 180 degrees.
23. The method of claim 18, wherein said gemstone is a diamond.
24. The method of claim 18, wherein said camera device is a video
camera.
25. The method of claim 18, wherein said gemstone securing means
further comprises an elongated aperture.
26. The method of claim 18, wherein said device for producing an
intense flashing light is synchronized with the shutter of said
camera.
27. The method of claim 18, wherein said device for producing a high
level of illumination is a strobe.
28. The method of claim 27, wherein said strobe flickers every about
25 milliseconds.
29. The method of claim 27, wherein said time of illumination of said
strobe is from about 1 microsecond to about 700 microseconds.
30. The method of claim 18, wherein said computer processing unit
comprises:
(a) a driver connected to said camera;
(b) a frame grabber connected at one end to said driver and at
a second distal end to said computer;
(c) PC computational device; and
31. The method of claim 18, wherein said computer processing unit
comprises a means of transferring video data.
32. The method of claim 18-, wherein said means of transferring
video data is set by CCIR.
33. The method of claim 18, wherein said computer processing unit
further comprises software configured to convert resulting images
of said gemstone into a three dimensional image.
34. The method of claim 18, wherein said step of imaging said
gemstone is continuous imaging.
35. A gemstone imaging system comprising:
(a) a camera device including at least one imaging device, said
camera device configured to producing continuous images
ofthe gemstone;
(b) a gemstone securing means for securing said gemstone;
(c) a gemstone rotational displacement element, attached to
said gemstone securing means, for rotational displacement
of said gemstone in relation to said at least one imaging
device; and
(d) computer processing unit for viewing said gemstone.
36. The gemstone imaging system of claim 35 further comprising a
device for producing high level of illumination.
37. The gemstone imaging system of claim 36, wherein said device
for producing high level of illumination is a strobe.
38. The gemstone imaging system of claim 36, wherein said gemstone
rotational displacement element is manually operated.
39. A gemstone imaging system for imaging a gemstone comprising:
(a) a camera device including at least one imaging device, said
camera device configured to producing continuous images
ofthe gemstone;
(b) a gemstone securing means for securing said gemstone;
(c) a gemstone rotational displacement element, attached to
said gemstone securing means, for rotationally displacing
said gemstone in relation to said at least one imaging
device;
(d) a device for producing high level of illumination;
(e) a gemstone; and
(f) computer processing unit for viewing said gemstone.
40. A diamond imaging system comprising: (a) a camera device including at least one imaging device, said
camera device configured to producing continuous images
ofthe gemstone;
(b) a gemstone securing means for securing said gemstone;
(c) a gemstone rotational displacement element, attached to
said gemstone securing means, for rotationally displacing
said gemstone in relation to said at least one imaging
device;
(d) a device for producing high level of illumination; and
(e) computer processing unit for viewing said gemstone.
41. A gemstone imaging system for use in gemstone processing
system comprising:
(a) a camera device including at least one imaging device, said
camera device configured to producing continuous images
ofthe gemstone;
(b) a gemstone securing means for securing said gemstone;
(c) a gemstone rotational displacement element, attached to
said gemstone securing means, for rotationally displacing
said gemstone in relation to said at least one imaging
device;
(d) a device for producing high level of illumination;
(e) computer processing unit for viewing said gemstone; and (f) a gemstone processing system, comprising computer
software conformed to perform gemstone processing.
42. A gemstone imaging system for contour and internal imaging
comprising:
(a) a camera device including at least one imaging device, said
camera device configured to producing continuous images
ofthe gemstone;
(b) a gemstone securing means for securing said gemstone
comprising an elongated aperture;
(c) a gemstone rotational displacement element, attached to
said gemstone securing means, for rotationally displacing
said gemstone in relation to said at least one imaging
device;
(d) a device for producing high level of illumination; and
(e) computer-processing unit for viewing said gemstone.
43. The gemstone imaging system of claim 42, wherein said
elongated aperture provides a means of imaging obscured portions
of said gemstone.
44. The system according to claims 1-17, 35-43 substantially as
herein described and with reference to the figures and examples.
45. The method according to any one of claims 18-34, substantially
as herein described and with reference to the figures and
examples.
46. The system of claim 1, fiirther comprising a micro-controller for
readily controlling any components of said system.
47. The method of claim 1, wherein said system further includes a
micro-controller for readily controlling any components of said
system.
48. The system of claim 1, wherein said gemstone is situated
substantially between said camera device and said device for
producing a high level of illumination.
49. The method of claim 18, wherein said gemstone is situated
substantially between said camera device and said device for
producing a high level of illumination.
0. The system of claim 1, further comprising a positional log for
providing a log of angular displacement of said gemstone during
illuminations.
51. The metiiod of claim 18, wherein said system fiirther includes a
positional log for providing a log of angular displacement of said
gemstone during illuminations.
PCT/IL2003/000762 2002-09-27 2003-09-24 Three dimensional gemstone-imaging system and method WO2004028288A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL15196802A IL151968A0 (en) 2002-09-27 2002-09-27 Three dimensional gemstone imaging system and method
IL151968 2002-09-27

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WO2006033102A1 (en) * 2004-09-21 2006-03-30 Zvi Porat A system and method for three-dimensional location of inclusions in a gemstone
CZ298071B6 (en) * 2005-06-20 2007-06-13 Ceské vysoké ucení technické v Praze, Fakulta elektrotechnická Method of measuring shape of transparent objects, in particular ground stones and apparatus for making the same
WO2010103526A1 (en) * 2009-03-11 2010-09-16 Dsee Imaging Ltd. Methods and systems of imaging cut stones
WO2019185993A1 (en) * 2018-03-28 2019-10-03 Engemma Oy Extended focal plane imaging by using a gemstone manipulator
WO2019185974A1 (en) * 2018-03-28 2019-10-03 Engemma Oy Holder arrangement for gemological object recognition system
CN111707666A (en) * 2020-05-11 2020-09-25 湖北爱默思智能检测装备有限公司 Diamond waistline observation instrument and observation method

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006033102A1 (en) * 2004-09-21 2006-03-30 Zvi Porat A system and method for three-dimensional location of inclusions in a gemstone
CZ298071B6 (en) * 2005-06-20 2007-06-13 Ceské vysoké ucení technické v Praze, Fakulta elektrotechnická Method of measuring shape of transparent objects, in particular ground stones and apparatus for making the same
WO2010103526A1 (en) * 2009-03-11 2010-09-16 Dsee Imaging Ltd. Methods and systems of imaging cut stones
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WO2019185993A1 (en) * 2018-03-28 2019-10-03 Engemma Oy Extended focal plane imaging by using a gemstone manipulator
WO2019185974A1 (en) * 2018-03-28 2019-10-03 Engemma Oy Holder arrangement for gemological object recognition system
CN111707666A (en) * 2020-05-11 2020-09-25 湖北爱默思智能检测装备有限公司 Diamond waistline observation instrument and observation method
CN111707666B (en) * 2020-05-11 2024-02-23 武汉恒宇科教仪器设备研发有限公司 Diamond waist line observer and observation method

Also Published As

Publication number Publication date
AU2003264843A8 (en) 2004-04-19
WO2004028288A3 (en) 2004-12-09
AU2003264843A1 (en) 2004-04-19
IL151968A0 (en) 2003-04-10

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