JPH05210140A - Optical information processor - Google Patents

Abstract

PURPOSE:To provide the optical information processor which can make exact recognition in spite of the presence of a specific point in logarithmic polar coordinates. CONSTITUTION:This processor is constituted of a 1st space optical modulating element 2 which displays an input image, an input section which consists of two elements of a phase plate 5 for adding a phase to the input image, a light source 3 which irradiates the input section, a lens 6 which has the constituting element having the longest optical path length from the light source 3 in the input section as the focal plane of the front side thereof, a photoelectric converter 7 which is disposed on the focal plane on the rear side of the lens 6, a logarithmic polar coordinate converter which optically executes logarithmic polar coordinate conversion and an optical correlator. The Fourier transform image of the input image is diffused by providing the phase plate 5, by which the concentration of the light only to the origin as the specific point of the logarithmic polar coordinates is averted and, therefore, the drop-out of the image information by the specific point processing is minimized. The recognition invariable with the extension and contraction, rotation and position of the object is exactly executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical information processing apparatus for identifying, from a plurality of input images, a match with a specific reference image, particularly in a visual recognition apparatus such as an industrial robot.

[0002]

2. Description of the Related Art As a prior example of an optical information processing apparatus,
For example, it is shown in Japanese Patent Application No. 2-57118.

FIG. 5 shows the basic configuration of the optical information processing apparatus of this prior art. 301 is a TV camera capable of changing the zoom ratio, and 302 is a TV camera 30.
1, a first liquid crystal display for displaying an image captured by 1; 303, a second liquid crystal display arranged adjacent to the first liquid crystal display 302; 304, a semiconductor laser; and 305, light from the semiconductor laser 304. The collimator lens 306 for making parallel light is a lens, and the second liquid crystal display 303 is arranged on the front focal plane of the lens 306.

A photoelectric conversion device 307 is a lens 306.
It is located in the rear focal plane. Reference numeral 308 corresponds to computer hologram data pre-calculated with each picture element on the second liquid crystal display 303 as a sampling point for logarithmic polar coordinate conversion, that is, the transmittance for each picture element of the second liquid crystal display 303. It is a read only memory (ROM) in which applied voltage data is written.

The operation of the prior art example of the optical information processing apparatus configured as described above will be described. First, when the target object is captured by the TV camera 301, the image is displayed on the first liquid crystal display 302. The first liquid crystal display 302 has a collimator lens 305.
It is irradiated with the coherent light from the semiconductor laser 304 which is collimated by the laser beam.

At this time, phase information for optically performing logarithmic polar coordinate conversion is displayed on the second liquid crystal display 303 as RO.
The data written in M308 serves as an input signal and spatially modulates the transmittance of each picture element of the second liquid crystal display 303 to display it in the form of a computer generated hologram.
(For example, D.Casasent, Appl.Opt.26,9
38 (1987). ) Therefore, the input image displayed on the first liquid crystal display 302 and the phase information for logarithmic polar coordinate conversion are displayed on the second liquid crystal display 30.
3 is overlaid.

Further, the second liquid crystal display 303
Is arranged on the front focal plane of the lens 306, the optical product of the input image and the phase information for logarithmic polar coordinate conversion is optically Fourier transformed by the lens 306, and the logarithmic polar coordinate transformed image of the input image of the target object is obtained. , Photoelectric conversion device 30
Detected by 7. Using this log-polar coordinate transformation image,
By performing the pattern matching, the target object can be accurately recognized because the correlation value with the reference image does not change even when the target object changes in scale and rotates.

However, since the logarithmic polar coordinate transformation has no invariance with respect to the parallel movement of the target object, there is a problem that accurate recognition cannot be performed when the target object moves in parallel. To solve this problem, the Fourier transform image of the input image is transformed into a logarithmic polar coordinate, and by using this logarithmic polar coordinate transformed image, pattern matching is performed. It is known that the target object can be accurately recognized because the correlation value with the standard image does not change.

[0009]

However, in the above configuration, the Fourier transform image of the input image is concentrated almost in the vicinity of the origin, which is a singular point of logarithmic polar coordinates, so most of the light is shielded and accurate recognition is not possible. It had a problem that it could not be done.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide an optical information processing apparatus capable of performing accurate recognition even if there is a singular point of logarithmic polar coordinates.

[0011]

In order to solve the above-mentioned problems, the optical information processing apparatus of the present invention comprises a first spatial light modulator for displaying an input image and a phase plate for adding a phase to the input image. An input unit composed of two elements, a light source for irradiating the input unit, and a lens having a component having the longest optical path length from the light source in the input unit as a front focal plane thereof,
A photoelectric conversion device arranged on the focal plane on the rear side of the lens,
A logarithmic polar coordinate conversion device for optically performing logarithmic polar coordinate conversion,
And an optical correlator.

Alternatively, a first spatial light modulator for displaying an input image and an input section composed of two elements of a phase plate for adding a phase to the input image, and a light source for irradiating the input section,
A first lens having a front focal plane of a component having the longest optical path length from the light source in the input unit, and a second spatial light arranged on the rear focal plane of the first lens. A modulation element, a second lens having the second spatial light modulation element as a front focal plane, a photoelectric conversion device arranged on the rear focal plane of the second lens, and an optical correlator. It is characterized by that.

Alternatively, an input section composed of two elements, a first spatial light modulator for displaying an input image and a second spatial light modulator for adding a phase to the input image, and a light source for irradiating the input section. A first lens having a front focal plane of a component having the longest optical path length from the light source in the input section, and a third space arranged on the rear focal plane of the first lens. A light modulation element, a second lens having the third spatial light modulation element as a front focal plane, and a photoelectric conversion device arranged on the rear focal plane of the second lens. It is what

Alternatively, a first spatial light modulator for displaying an input image, and a light source for illuminating the spatial light modulator,
A first lens having the spatial light modulator as a front focal plane thereof, a second lens having a rear focal plane of the first lens as a front focal plane, and a rear lens of the second lens. It is characterized by including a photoelectric conversion device arranged on the focal plane on the side, a logarithmic polar coordinate conversion device for optically performing logarithmic polar coordinate conversion, and an optical correlator.

[0015]

According to the present invention, the Fourier transform image of the input image is diffused and the light is not concentrated only at the origin which is the singular point of the logarithmic polar coordinates by the above-mentioned configuration, so that the loss of image information due to the singular point processing is minimized. Therefore, it is possible to accurately perform expansion / contraction, rotation, and position-invariant recognition of the target object.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the optical information processing apparatus according to claim 1 will be described below with reference to the drawings.

FIG. 1 shows the basic configuration of the apparatus of this embodiment. In FIG. 1, 1 is a TV camera, 2 is a first liquid crystal display for displaying an image captured by the TV camera 1, 3 is a first semiconductor laser, and 4 is parallel light from the first semiconductor laser 3. The collimating first collimator lens 5 is placed adjacent to the first liquid crystal display 2,
It is a phase plate in which the phase of transmitted light is random phase information P. This phase plate 5 is provided with phase information P on a glass substrate, for example.
It is created by applying a transparent film having a film thickness equivalent to.
6 is the first lens and the phase plate 5 is the first lens 6
Is located in the front focal plane of the. Reference numeral 7 denotes a first photoelectric conversion device arranged on the rear focal plane of the first lens 6.

Reference numeral 8 is a second liquid crystal display for displaying an image picked up by the first photoelectric conversion device 7, 9 is a second semiconductor laser, and 10 is parallel light from the second semiconductor laser 9. A second collimator lens, 11 is a third liquid crystal display and is arranged adjacent to the second liquid crystal display 8, and 12 is each pixel on the third liquid crystal display 11 for logarithmic polar coordinate conversion. This is a first memory in which coordinate conversion computer generated hologram data calculated in advance as sampling points, that is, applied voltage data corresponding to the transmittance of each pixel of the third liquid crystal display 11 is written. Reference numeral 13 denotes a second lens, and the third liquid crystal display 11 is arranged on the front focal plane thereof. 14
Is a second photoelectric conversion device arranged on the back focal plane of the second lens 13, and the logarithmic polar coordinate conversion device is composed of 8 to 14.

Reference numeral 15 is a fourth liquid crystal display for displaying an image picked up by the second photoelectric conversion device 14, 16 is a third semiconductor laser, and 17 is parallel light from the third semiconductor laser 16. A third collimator lens, 18 is a third lens whose front focal plane is the fourth liquid crystal display 15, 19 is a fifth liquid crystal display arranged on the rear focal plane of the third lens 18, and 20 is a reference The computer-generated hologram data preliminarily calculated with respect to the image by using each picture element on the fifth liquid crystal display 19 as sampling points, that is, applied voltage data corresponding to the transmittance of each picture element of the fifth liquid crystal display 19 is displayed. It is the written second memory. Reference numeral 21 denotes a fourth lens, which has a fifth lens on its front focal plane.
The liquid crystal display 19 of is arranged. 22 is the fourth
Is a photodetector arranged on the back focal plane of the lens 21, and the optical correlator is composed of 15 to 22.

The operation of the apparatus of this embodiment constructed as described above will be described below with reference to FIG. First,
When the TV camera 1 captures an image of the target object, the image is displayed on the first liquid crystal display 2. This first
The liquid crystal display 2 and the phase plate 5 are illuminated by the coherent light from the first semiconductor laser 3 which is collimated by the first collimator lens 4.

Therefore, the input image information f of the target object displayed on the first liquid crystal display 2 and the random phase information P of the phase plate are optically superposed on the phase plate 5, and f
XP. Further, since the phase plate 5 is arranged on the front focal plane of the first lens 6, the information f × on the phase plate 5 is set.
P is optically Fourier transformed by the first lens 6,
The Fourier transform image PS (f × P) is the first photoelectric conversion device 7
Detected (where PS (f × P) = | FT
(F × P) | ² and FT (f × P) represent f × P Fourier transform. ).

This Fourier transform image is displayed on the second liquid crystal display 8. The second liquid crystal display 8 and the third liquid crystal display 11 are illuminated by the coherent light from the second semiconductor laser 9 which is collimated by the second collimator lens 10. Therefore, the Fourier transform image PS displayed on the second liquid crystal display 8
(F × P) and the phase information A for logarithmic polar coordinate conversion are optically superimposed on the third liquid crystal display 11, and PS
(F × P) × A.

Further, since the third liquid crystal display 11 is arranged on the front focal plane of the second lens 13,
Information PS (f × P) × on the third liquid crystal display 11
A is optically coordinate-transformed by the second lens 13 to obtain a logarithmic polar coordinate transformed image PS of the Fourier transformed image PS (f × P).
The second photoelectric conversion device 14 detects {PS (f × P) × A}.

This coordinate-converted image is displayed on the fourth liquid crystal display 15. This fourth liquid crystal display 1
5 is irradiated by the coherent light from the third semiconductor laser 16 which is collimated by the third collimator lens 17. Further, since the fourth liquid crystal display 15 is arranged on the front focal plane of the third lens 18, the coordinate conversion image PS {is displayed on the rear focal plane of the third lens 18, that is, on the fifth liquid crystal display 19. PS (f × P) × A}
Fourier transform image FT [PS {PS (f × P) × A}] of
Is formed. At this time, a computer generated hologram created based on the information of FT [PS {PS (g × P) × A}] is displayed on the fifth liquid crystal display 19 (where g is reference image information). Is shown).

Therefore, the computer generated hologram image displayed on the fifth liquid crystal display 19 and the Fourier transform image FT.
[PS {PS (f × P) × A}] is optically superimposed on the fifth liquid crystal display 19. When this is further Fourier-transformed by the fourth lens 21, as is known as optical pattern matching, when the target object and the reference image match, the size of the target object, the direction of rotation, and the position of the target object cause a difference. Without a bright spot, the photodetector 22
Detected in.

As described above, according to this embodiment, the phase plate 5
By providing the, the Fourier transform image of the input image is diffused, and the light is not concentrated only at the origin, which is the singular point of the logarithmic polar coordinates, so the loss of image information due to singular point processing can be minimized, and the target object It is possible to accurately recognize the expansion, contraction, rotation, and position of the invariant.

Further, since the light shielded by the singularity processing is reduced, the light utilization efficiency can be improved.

Although the first liquid crystal display 2 and the phase plate 5 are arranged in this order in this embodiment, the phase plate 5 and the first liquid crystal display 2 may be arranged in that order. Similarly, although the second liquid crystal display 8 and the third liquid crystal display 11 are arranged in this order in this embodiment, the third liquid crystal display 11 and the second liquid crystal display 8 may be arranged in that order.

In this embodiment, a random phase is used as the phase information P, but Japanese Patent Application No. 3-2016 is applied so that aliasing does not occur when a computer generated hologram is created.
It goes without saying that the recognition accuracy is further improved by using the random phase described in 86.

An embodiment of the optical information processing apparatus according to claim 2 will be described below with reference to the drawings.

FIG. 2 shows the basic configuration of the apparatus of this embodiment. In FIG. 2, the same components as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

The operation will be described below with reference to FIG.
First, when the TV camera 1 captures an image of a target object, the image is displayed on the first liquid crystal display 2. The first liquid crystal display 2 and the phase plate 5 are illuminated with the coherent light from the first semiconductor laser 3 which is collimated by the first collimator lens 4. Therefore, the input image information f of the target object displayed on the first liquid crystal display 2 and the random phase information P of the phase plate are optically superposed on the phase plate to be f × P.

Since the phase plate 5 is arranged on the front focal plane of the first lens 6, the information f × on the phase plate 5 is obtained.
P is optically Fourier transformed by the first lens 6,
The Fourier transform image FT (f × P) is formed on the back focal plane of the first lens 6, that is, on the third liquid crystal display 11.

At this time, the third liquid crystal display 1
Phase information A for performing logarithmic polar coordinate conversion is displayed on 1. Therefore, the Fourier transform image FT (f × P) and the phase information A for logarithmic polar coordinate conversion are optically superimposed on the third liquid crystal display 11 to be FT (f × P) × A. Further, since the third liquid crystal display 11 is disposed on the front focal plane of the second lens 13, the information FT (fP) × A on the third liquid crystal display 11 is determined by the second lens 13. Optically coordinate-transformed, Fourier-transformed image FT (f × P) logarithmic polar-transformed image PS {FT
(F × P) × A} is detected by the second photoelectric conversion device 14.

This coordinate transformed image is displayed on the fourth liquid crystal display 15. This fourth liquid crystal display 1
5 is irradiated by the coherent light from the third semiconductor laser 16 which is collimated by the third collimator lens 17. Further, since the fourth liquid crystal display 15 is arranged on the front focal plane of the third lens 18, the coordinate conversion image PS {is displayed on the rear focal plane of the third lens 18, that is, on the fifth liquid crystal display 19. FT (f × P) × A}
Fourier transform image FT [PS {FT (f × P) × A}] of
Is formed. At this time, a computer generated hologram based on the information of FT [PS {FT (g × P) × A}] is displayed on the fifth liquid crystal display 19 (where g is reference image information). Is shown).

Therefore, the computer generated hologram image displayed on the fifth liquid crystal display 19 and the Fourier transform image FT.
[PS {FT (f × P) × A}] is optically superimposed on the fifth liquid crystal display 19. When this is further Fourier-transformed by the fourth lens 21, when the target object in the input image and the reference image match, as is known as optical pattern matching, the size and rotation direction of the target object are determined. A bright spot is generated regardless of the position and is detected by the photodetector 22.

As described above, according to this embodiment, not only the same effects as the first invention can be obtained, but also the first photoelectric conversion device 7, the second liquid crystal display 8, and the second semiconductor laser 9 are provided. Also, the second collimator lens 11 can be eliminated, and the device can be downsized.

Further, in the apparatus of the above embodiment shown in FIG. 1,
Since the first photoelectric conversion device 7 is used, the position information of the target object is missing, and the position of the target object in the input image cannot be known. However, in the apparatus of this embodiment, since the first photoelectric conversion device 7 is not used, the position of the target object in the input image can be accurately known.

Although the first liquid crystal display 2 and the phase plate 5 are arranged in this order in the apparatus of this embodiment, the phase plate 5 and the first liquid crystal display 2 may be arranged in that order.

Although the random phase is used as the phase information P in the apparatus of this embodiment, Japanese Patent Application No. 3-20 is used so that aliasing does not occur when a computer generated hologram is created.
It goes without saying that the recognition accuracy is further improved by using the random phase described in 1686.

An embodiment of the optical information processing apparatus according to claim 3 will be described below with reference to the drawings.

FIG. 3 shows the basic configuration of the apparatus of this embodiment. In FIG. 3, the same components as those in the first embodiment of the invention are designated by the same reference numerals and the description thereof will be omitted. Reference numeral 101 denotes a sixth liquid crystal display, which modulates only the phase. 102 is a third memory, 103 is a fourth memory, and 104 is a changeover switch.

The operation of the apparatus of this embodiment constructed as described above will be described below with reference to FIG. First,
When the TV camera 1 captures an image of the target object, the image is displayed on the first liquid crystal display 2 through the changeover switch 104. At this time, random phase information P is displayed on the sixth liquid crystal display 101. Then, the first liquid crystal display 2 and the sixth liquid crystal display 101 are illuminated with coherent light from the first semiconductor laser 3 which is collimated by the first collimator lens 4.

Therefore, the input image information f of the target object displayed on the first liquid crystal display 2 and the random phase information P displayed on the sixth liquid crystal display 101 are displayed on the sixth liquid crystal display 101. Are optically superposed on each other, resulting in f × P. Further, since the sixth liquid crystal display 101 is arranged on the front focal plane of the first lens 6, the information f × P on the sixth liquid crystal display is optically Fourier transformed by the first lens 6. A Fourier transform image FT (f × P) is formed on the back focal plane of the first lens 6, that is, on the third liquid crystal display 11.

At this time, the third liquid crystal display 1
Phase information A for performing logarithmic polar coordinate conversion is displayed on 1. Therefore, the Fourier transform image FT (f × P) and the phase information A for logarithmic polar coordinate conversion are optically superimposed on the third liquid crystal display 11 to be FT (f × P) × A. Further, since the third liquid crystal display 11 is disposed on the front focal plane of the second lens 13, the information FT (fP) × A on the third liquid crystal display 11 is determined by the second lens 13. Optically coordinate-transformed, Fourier-transformed image FT (f × P) logarithmic polar-transformed image PS {FT
(F × P) × A} is detected by the second photoelectric conversion device 14.

Then, the coordinate conversion image is displayed on the first liquid crystal display 2 through the changeover switch 104. At this time, the sixth liquid crystal display 10
In 1, the same arbitrary phase is displayed over the entire surface. That is, the sixth liquid crystal display 101 receives no modulation. Then, the first liquid crystal display 2 and the sixth liquid crystal display 101 are illuminated with coherent light from the first semiconductor laser 3 which is collimated by the first collimator lens 4.

In addition, the sixth liquid crystal display 101
Is located in the front focal plane of the first lens 6,
A coordinate-transformed image PS {FT (f × P) × A} is formed on the rear focal plane of the first lens 6, that is, on the second liquid crystal display 11.
Fourier transform image FT [PS {FT (f × P) × A}] of
Is formed. At this time, a computer generated hologram created based on the information of FT [PS {FT (g × P) × A}] is displayed on the second liquid crystal display 11 (where g is reference image information). Is shown).

Therefore, the computer generated hologram image displayed on the second liquid crystal display 11 and the Fourier transform image FT.
[PS {FT (f × P) × A}] is optically superimposed on the second liquid crystal display 11. When this is further Fourier-transformed by the second lens 13, as known as optical pattern matching, when the target object in the input image and the reference image match, the size of the target object and the rotation direction are determined. A bright spot is generated regardless of the position and is detected by the photodetector 22.

As described above, according to this embodiment, not only the same effect as the second aspect of the invention can be obtained, but also the device can be remarkably downsized.

In this embodiment, the first liquid crystal display 2 and the sixth liquid crystal display 101 are arranged in this order.
The sixth liquid crystal display 101 and the first liquid crystal display 2 may be arranged in this order.

In this embodiment, the random phase is used as the phase information P, but Japanese Patent Application No. 3-2016 is applied so that aliasing does not occur when a computer generated hologram is created.
It goes without saying that the recognition accuracy is further improved by using the random phase described in 86.

An embodiment of the optical information processing apparatus according to claim 4 will be described below with reference to the drawings.

FIG. 4 shows the basic configuration of the apparatus of this embodiment. In FIG. 4, the same components as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The wide viewing angle lens 201 is different from the first invention.

The operation of the apparatus of this embodiment constructed as described above will be described below with reference to FIG. First,
When the TV camera 1 captures an image of the target object, the image is displayed on the first liquid crystal display 2. This first
The liquid crystal display 2 is illuminated with the coherent light from the first semiconductor laser 3 which is collimated by the first collimator lens 4. Further, since this first liquid crystal display 2 is arranged on the front focal plane of the first lens 6, the input image information f of the target object displayed on the first liquid crystal display 2 is the first lens 6 Is Fourier-transformed optically, and the wide-angle lens 201 transforms the Fourier-transformed image FT (f). This modification expands the low frequency region where the light intensity is strong and compresses the high frequency region. Then, this converted image F (= | GT {FT
(F)} | ² , where GT indicates the deformation due to the wide viewing angle lens 201. ) Is detected by the first photoelectric conversion device 7.

The converted image F is displayed on the second liquid crystal display 8. The second liquid crystal display 8 and the third liquid crystal display 11 are illuminated by the coherent light from the second semiconductor laser 9 which is collimated by the second collimator lens 10. Therefore, the converted image F displayed on the second liquid crystal display 8 and the phase information A for logarithmic polar coordinate conversion are optically superimposed on the third liquid crystal display 11 and become F × A. Further, since the third liquid crystal display 11 is arranged on the front focal plane of the second lens 13, the information F × A on the third liquid crystal display 11 is optically transformed by the second lens 13. The transformed polar coordinate transformed image PS (F ×
A) is detected by the second photoelectric conversion device 14.

This coordinate-converted image is displayed on the fourth liquid crystal display 15. This fourth liquid crystal display 1
5 is irradiated by the coherent light from the third semiconductor laser 16 which is collimated by the third collimator lens 17. Further, since the fourth liquid crystal display 15 is disposed on the front focal plane of the third lens 18, the coordinate conversion image PS (on the rear focal plane of the third lens 18, that is, the fifth liquid crystal display 19 is displayed. An F × A) Fourier transform image FT {PS (F × A)} is formed. At this time, on the fifth liquid crystal display 19, FT {PS (G ×
A)} A computer generated hologram is displayed based on the information (where G = | GT {FT (g)} | ² , g
Indicates reference image information g. ).

Therefore, the computer generated hologram image displayed on the fifth liquid crystal display 19 and the Fourier transform image FT.
{PS (F × A)} is optically superimposed on the fifth liquid crystal display 19. This is the fourth lens 2
When the Fourier transform by 1 is performed, as is known as optical pattern matching, when the target object in the input image and the reference image match, the brightness of the target object does not depend on the size, rotation direction, or position of the target object. A point is generated and detected by the photodetector 22.

As described above, according to this embodiment, by providing the wide viewing angle lens 201, the Fourier transform image of the input image is diffused, and the light is not concentrated only at the origin which is the singular point of the logarithmic polar coordinates. It is possible to minimize loss of image information due to singularity processing, and it is possible to accurately perform expansion / contraction, rotation, and position-invariant recognition of a target object.

Although the first liquid crystal display 2 and the phase plate 5 are arranged in this order in this embodiment, the phase plate 5 and the first liquid crystal display 2 may be arranged in that order. Similarly, in the present embodiment, the second liquid crystal display 8 and the third liquid crystal display 11 are arranged in this order, but the third liquid crystal display 11 and the second liquid crystal display 8 may be arranged in that order.

[0060]

As described above, according to the present invention,
Almost all light is focused because the Fourier transform image of the input image is concentrated near the origin, which is a singular point of logarithmic polar coordinates, which is a problem of the conventional optical information processing device that performs expansion / contraction, rotation, and position-invariant recognition of the target object. In contrast to the problem of being unable to perform accurate recognition due to light shielding, a phase plate that adds a phase or a wide-viewing-angle lens is provided, which is different from the conventional method, and the expansion and contraction, rotation, and position of the target object can be recognized invariably Can be done accurately.

[Brief description of drawings]

FIG. 1 is a main part configuration diagram showing an embodiment of an optical information processing apparatus of the present invention.

FIG. 2 is a configuration diagram of a main part showing another embodiment of the present invention.

FIG. 3 is a main part configuration diagram showing still another embodiment of the present invention.

FIG. 4 is a main part configuration diagram showing still another embodiment of the present invention.

FIG. 5 is a configuration diagram of a main part of a conventional optical information processing device.

[Explanation of symbols]

 1 TV Camera 2 1st Liquid Crystal Display 3 1st Semiconductor Laser 4 1st Collimator Lens 5 Phase Plate 6 1st Lens 7 1st Photoelectric Conversion Device 8 2nd Liquid Crystal Display 9 2nd Semiconductor Laser 10 10th 2 collimator lens 11 3rd liquid crystal display 12 1st memory 13 2nd lens 14 2nd photoelectric conversion device 15 4th liquid crystal display 16 3rd semiconductor laser 17 3rd collimator lens 18 3rd lens 19 Fifth liquid crystal display 20 Second memory 21 Fourth lens 22 Photodetector 201 Wide viewing angle lens

Claims (6)

[Claims] 1. An input section comprising two elements, a first spatial light modulator for displaying an input image and a phase plate for adding a phase to the input image, a light source for irradiating the input section, and an input section for the input section. Among them, the lens having the longest optical path length from the light source as its front focal plane, the photoelectric conversion device arranged on the rear focal plane of the lens, and the logarithmic polar coordinates for optically performing logarithmic polar coordinate conversion. An optical information processing device comprising a conversion device and an optical correlator. 2. An input section comprising two elements, a first spatial light modulator for displaying an input image and a phase plate for adding a phase to the input image, a light source for irradiating the input section, and an input section for the input section. A first lens having a component having the longest optical path length from the light source as a front focal plane thereof, and a second spatial light modulator arranged on the rear focal plane of the first lens, A second lens having the second spatial light modulator as a front focal plane, a photoelectric conversion device arranged on the rear focal plane of the second lens, and an optical correlator. Optical information processing device. 3. A first spatial light modulator for displaying an input image and a second spatial light modulator for adding a phase to the input image.
An input section consisting of two elements, a light source for irradiating the input section, a first lens having a component having the longest optical path length from the light source in the input section as a front focal plane thereof, A third spatial light modulation element arranged on the back focal plane of the first lens; a second lens having the third spatial light modulation element as a front focal plane; and a rear side of the second lens And an optoelectronic conversion device arranged on the focal plane of the optical information processing device. 4. A first spatial light modulation element for displaying an input image, a light source for illuminating the spatial light modulation element, a first lens having the spatial light modulation element as a front focal plane thereof, The second lens having the front focal plane as the rear focal plane of the first lens and the photoelectric conversion device arranged on the rear focal plane of the second lens optically perform logarithmic polar coordinate conversion. An optical information processing apparatus comprising a logarithmic polar coordinate conversion device and an optical correlator. 5. The optical information processing apparatus according to claim 4, wherein the second lens is a wide viewing angle lens. 6. The optical information processing apparatus according to claim 1, wherein the spatial light modulator is a liquid crystal display.