WO2005103840A1 - 光波面制御パターン生成装置及び光波面制御パターン生成方法 - Google Patents
光波面制御パターン生成装置及び光波面制御パターン生成方法 Download PDFInfo
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- WO2005103840A1 WO2005103840A1 PCT/JP2005/007920 JP2005007920W WO2005103840A1 WO 2005103840 A1 WO2005103840 A1 WO 2005103840A1 JP 2005007920 W JP2005007920 W JP 2005007920W WO 2005103840 A1 WO2005103840 A1 WO 2005103840A1
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- control pattern
- wavefront control
- reproduced image
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- optical wavefront
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- 230000003287 optical effect Effects 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000011156 evaluation Methods 0.000 claims abstract description 67
- 238000001514 detection method Methods 0.000 claims description 52
- 238000005457 optimization Methods 0.000 claims description 33
- 238000004364 calculation method Methods 0.000 claims description 19
- 238000005286 illumination Methods 0.000 claims description 18
- 230000001678 irradiating effect Effects 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims 1
- 230000004048 modification Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 238000002922 simulated annealing Methods 0.000 description 5
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001093 holography Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/04—Processes or apparatus for producing holograms
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/08—Synthesising holograms, i.e. holograms synthesized from objects or objects from holograms
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/06—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the phase of light
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2294—Addressing the hologram to an active spatial light modulator
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/0005—Adaptation of holography to specific applications
- G03H2001/0088—Adaptation of holography to specific applications for video-holography, i.e. integrating hologram acquisition, transmission and display
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/0486—Improving or monitoring the quality of the record, e.g. by compensating distortions, aberrations
- G03H2001/0491—Improving or monitoring the quality of the record, e.g. by compensating distortions, aberrations by monitoring the hologram formation, e.g. via a feed-back loop
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2202—Reconstruction geometries or arrangements
- G03H2001/2244—Means for detecting or recording the holobject
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2210/00—Object characteristics
- G03H2210/40—Synthetic representation, i.e. digital or optical object decomposition
- G03H2210/45—Representation of the decomposed object
- G03H2210/454—Representation of the decomposed object into planes
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2226/00—Electro-optic or electronic components relating to digital holography
- G03H2226/11—Electro-optic recording means, e.g. CCD, pyroelectric sensors
- G03H2226/13—Multiple recording means
Definitions
- the present invention relates to an optical wavefront control pattern generation apparatus and an optical wavefront control pattern generation method.
- the present invention relates to an image reproducing system that displays a reproduced image of an object on a reproduced image display unit by irradiating illumination light to a light wavefront control unit that records a lightwave front control pattern.
- the present invention relates to an optical wavefront control pattern generating apparatus and an optical wavefront control pattern generating method for generating an optimal optical wavefront control pattern stored in an optical wavefront control unit.
- a three-dimensional data acquisition device disclosed in Patent Document 1 is known. According to such a three-dimensional data acquisition device, it is possible to form three-dimensional data of a virtual object in a computer.
- a powerful three-dimensional data acquisition device displays a three-dimensional image based on the acquired three-dimensional data of an object using a three-dimensional image presentation technique such as computer holography. Not aware of Therefore, a powerful 3D data acquisition device must convert or calculate 3D data based on the acquired 3D data in order to display the 3D image in accordance with the type and display format of the 3D image. I needed to.
- Patent Document 2 and Non-Patent Document 1 disclose techniques for recording interference fringes of light using an imaging device such as a CCD camera in order to generate a hologram that displays a stereoscopic image of an object. Have been.
- the pattern of the light interference fringe itself is obtained using an image sensor such as a CCD camera.
- an image sensor such as a CCD camera.
- the spatial resolution of a general CCD camera is about 5 / zm
- the three-dimensional images that can be obtained by a powerful CCD camera are limited to those with a viewing range of about 5 ° to 10 °. .
- Patent Document 1 Japanese Patent Application Laid-Open No. 2004-37396
- Patent Document 2 Japanese Patent Application Laid-Open No. 9-237029
- Non-Patent Document 1 Sato et al., "Recording Holograms and Reconstructing 3D Moving Images", 2004 IEICE General Conference
- Patent Document 1 As described above, in the conventional technology, three-dimensional data is acquired with a view to displaying a stereoscopic image, and problems such as! / ⁇ (see Patent Document 1) and interference fringes of light are removed. As a result of direct acquisition, high precision of the device, coherence of the light source, anti-vibration measures, etc. are required, and it is not possible to acquire light interference fringes with a simple device. Patent Document 2 and Non-patent Document 1).
- the present invention has been made in view of the above points, and reduces restrictions such as the spatial resolution (spatial resolution) of an imaging device such as a CCD camera, and does not require a high-precision device. It is an object of the present invention to provide an optical wavefront control pattern generation device and an optical wavefront control pattern generation method capable of generating an optical wavefront control pattern for displaying a stereoscopic image under a light device or environment.
- a first feature of the present invention is that an image for displaying a reproduced image of an object on a reproduced image display unit by irradiating a light wavefront control unit recording a lightwave front control pattern with illumination light.
- a light wavefront control pattern generation device for generating an optimum lightwavefront control pattern stored in said lightwave front control unit in a reproduction system, comprising: a target for detecting spatial information of said object as a target image.
- the evaluation is performed on the reproduced image detected by the raw image detection unit, and a change process is performed on the optical wavefront control pattern so that the evaluation result satisfies a predetermined condition.
- an optimizing unit for generating a light wavefront control pattern.
- the target image detecting unit includes a plurality of target image detecting sensors capable of detecting the target image from a predetermined direction
- the reproduced image detecting unit includes A plurality of reproduction image detection sensors capable of detecting the reproduction image displayed on the reproduction image display unit from a predetermined direction by the reproduction light in which at least one of the amplitude and the phase of the illumination light is modulated.
- V is configured to evaluate the reproduced image based on the reproduced image.
- the plurality of target image detecting sensors and the plurality of reproduced image detecting sensors may be configured to have the same type and arrangement.
- the optimizing unit is configured to determine, based on a type and an arrangement of the plurality of target image detecting sensors and the plurality of reproduced image detecting sensors, and the predetermined direction target image, Then, it is configured to evaluate the reproduced image.
- the optimizing unit performs a change process on the light wavefront control pattern, and evaluates an evaluation value of a reproduced image corresponding to the lightwave control pattern subjected to the change process. It is configured to generate the optimal light wavefront control pattern by repeatedly calculating and determining whether or not the force is to adopt the light wavefront control pattern subjected to the change processing based on the evaluation value. , You can.
- the optimization unit may perform! / It is configured to determine whether or not to adopt the control pattern.
- the optimizing unit determines an optical wavefront control pattern subjected to the change processing based on the adoption probability determined by the difference information and the repetition parameter value. It is configured to determine whether or not to adopt the system. [0018] In the first aspect of the present invention, the optimization unit performs the change processing, the calculation of the evaluation value, and the determination until the evaluation value of the reproduced image converges at a predetermined repetition parameter value. And it is configured to repeat.
- the optimizing unit may be configured to change the predetermined repetition parameter value within a predetermined range.
- the light wavefront control unit can modulate at least one of the amplitude and the phase of the illumination light by the recorded lightwave front control pattern. It is configured to include a device.
- a second feature of the present invention is that an image for displaying a reproduced image of an object on a reproduced image display unit by irradiating the light wavefront control unit recording the lightwave front control pattern with illumination light.
- a light wavefront control pattern generation method for generating an optimum lightwavefront control pattern stored in the lightwave front control unit, wherein a step of detecting spatial information of the object as a target image Detecting a reproduced image displayed on the reproduced image display unit; evaluating the detected reproduced image based on the detected target image; and And performing a change process on the optical wavefront control pattern so as to satisfy the above condition, thereby generating the optimal optical wavefront control pattern.
- FIG. 1 is a functional block diagram of an optical wavefront control pattern generation device according to a first embodiment of the present invention.
- FIG. 2 is a model diagram of an optical wavefront control pattern generation device according to a first embodiment of the present invention.
- FIGS. 3 (a) and 3 (b) are diagrams showing a state in which a reproduced image is detected in the optical wavefront control pattern generation device according to the first embodiment of the present invention.
- FIG. 4 is a diagram showing how a target image is detected in the optical wavefront control pattern generation device according to the first embodiment of the present invention.
- FIG. 5 is a functional block diagram of an optimization unit of the optical wavefront control pattern generation device according to the first embodiment of the present invention.
- FIG. 6 is a flowchart showing an operation of the optical wavefront control pattern generation device according to the first embodiment of the present invention.
- FIG. 7 is a diagram for explaining the operation of the optical wavefront control pattern generation device according to the first embodiment of the present invention.
- FIG. 8 is a diagram for explaining an effect of the optical wavefront control pattern generation device according to the first embodiment of the present invention.
- the configuration of the optical wavefront control pattern generation device 1 according to the first embodiment of the present invention will be described with reference to FIGS.
- the light wavefront control pattern generation device 1 according to the present embodiment irradiates the light wavefront control unit 20 that records the lightwave front control pattern with the illumination light 2 so that the reproduced image of the object B is reproduced.
- an optimal light wavefront control pattern stored in the light wavefront control unit 20 is generated.
- the light wavefront control pattern generation device 1 includes an illumination light irradiation unit 10, a light wavefront control unit 20, a reproduced image display unit 30, a reproduced image display unit 30, It includes a detection unit 40, an optimization unit 50, and a target image detection unit 60.
- the illumination light irradiation unit 10 irradiates the light wavefront control pattern (hologram) displayed on the lightwavefront control device of the lightwavefront control unit 20 with illumination light.
- the light wavefront control unit 20 records the lightwave front control pattern transmitted from the optimization unit 50, and displays the lightwave front control pattern on the light wave front control device.
- the reproduced image display unit 30 displays a reproduced image based on the reproduced light 3 propagated from the optical wavefront control unit 20.
- each pixel of the light wavefront control pattern displayed on the light wavefront control device emits light from the illumination light irradiation unit 10. At least one of the amplitude and the phase of the illumination light 2 is modulated to be a reproduced light 3, and the reproduced light 3 reaches the reproduced image display section 30 while changing its traveling direction, whereby a reproduced image is displayed.
- the reproduced image detection unit 40 detects the reproduced image displayed on the reproduced image display unit 30. . Specifically, the reproduced image detection unit 40 can detect a reproduced image displayed on the reproduced image display unit 30 from a predetermined direction by the reproduced light 3 in which at least one of the amplitude and the phase of the illumination light 2 has been modulated. A plurality of sensors (reproduced image detecting sensors) that can be provided.
- the reproduced image detecting unit 40 captures the reproduced image displayed on the reproduced image display unit 30 with the CCD camera, and converts the captured reproduced image into digital data.
- the obtained reproduced image data is transmitted to the optimization unit 50.
- the reproduced image detection unit 40 includes a left sensor 40A, a center sensor 40B, and a right sensor 40C. Therefore, as shown in FIG. 3B, the reproduced image detecting unit 40 acquires a plurality of reproduced images (reproduced images in a predetermined direction) photographed from various directions (for example, left, center, and right). can do.
- the target image detecting section 60 detects spatial information of the object B as a target image.
- the target image detecting section 60 includes a plurality of sensors (target image detecting sensors) that can detect the above-described target image from a predetermined direction.
- the target image detecting unit 60 captures spatial information of the target object with the CCD camera, and converts the captured spatial information (target image) into digital data.
- the target image data is transmitted to the optimization unit 50.
- the target image detecting section 60 includes a left sensor 60A, a center sensor 60B, and a right sensor 60C. Therefore, as shown in FIG. 4B, the target image detecting unit 60 acquires a plurality of target images (target images in a predetermined direction) photographed from various directions (for example, left, center, and right). can do.
- the target image detection sensors (60A to 60C) are sensors that acquire information indicating the appearance of an object existing in a real space, and are not necessarily required to detect light.
- the surface information of the target object may be obtained by utilizing the reflection of infrared rays or ultrasonic waves.
- the types and arrangements of the plurality of target image detecting sensors (60A to 60C) and the plurality of reproduced image detecting sensors (40A to 40C) may be the same, or the plurality of targets may be different. At least one of the type and arrangement of the image detection sensor (60A to 60C) and the plurality of reproduced image detection sensors (40A to 40C) may be different!
- the optimizing unit 50 evaluates the reproduced image detected by the reproduced image detecting unit 40 based on the target image detected by the target image detecting unit 60, and makes the evaluation result satisfy a predetermined condition. In this case, an optimum optical wavefront control pattern is generated by performing a change process on the optical wavefront control pattern.
- the optimizing unit 50 includes a plurality of target image detection sensors and a plurality of reproduction image detection sensors, which are detected in a predetermined direction by a plurality of target image detection sensors (60A to 60C). (40A to 40C) based on a plurality of reproduction images in a predetermined direction detected from a predetermined direction!
- the apparatus is configured to evaluate the reproduced image displayed on the reproduced image display section 30.
- the optimizing unit 50 is based on the types and arrangements of the plurality of target image detection sensors (60A to 60C) and the plurality of reproduction image detection sensors (40A to 40C), and the target image in the predetermined direction. ! /, Is configured to evaluate the reconstructed image!
- the optimization unit 50 The detection sensor (60A to 60C) and the plurality of reproduction image detection sensors (40A to 4OC) force By comparing the acquired target image data and reproduction image data as they are, the reproduction image displayed on the reproduction image display section 30 Can be evaluated.
- the optimization unit 50 Target image detection sensor (60A to 60C) force Converts the acquired target image data into data captured under the same conditions (sensor type and arrangement, etc.) as the reproduced image data. Then, the optimization unit 50 evaluates the reproduced image displayed on the reproduced image display unit 30 by comparing the converted target image data and the reproduced image data.
- the optimizing unit 50 is configured to generate an optimal optical wavefront control pattern by using an iterative optimization method such as a “simulated annealing” method.
- the optimization unit 50 performs a change process on the light wavefront control pattern (the solution before the Move operation). (Move operation), and calculate the evaluation value E of the reproduced image corresponding to the optical wavefront control pattern (the solution after the Move operation) that has been subjected to the change processing (Move operation). Based on the calculated evaluation value E, It is configured to generate an optimal optical wavefront control pattern by repeatedly determining whether or not to adopt the optical wavefront control pattern (the solution after the move operation) that has undergone the change processing (Move operation). You can do it.
- the optimization unit 50 performs light wavefront control that has performed the change processing (Move operation). It is configured to determine whether to adopt the pattern (the solution after the Move operation) or not!
- the optimization unit 50 performs an optical wavefront control pattern that has undergone the change processing (Move operation). (Solution after Move operation) may be configured to determine whether the force is adopted or not.
- the optimization unit 50 performs a change process (Move operation) and a calculation of the evaluation value E until the evaluation value E of the reproduced image converges at a predetermined repetition parameter value (temperature parameter value T). It may be configured to repeat the above determination.
- the optimization unit 50 is configured to change the above-described repetition parameter value (temperature parameter value T) within a predetermined range (a range from a sufficient high temperature force to a sufficient low temperature). It is good.
- the optimization unit 50 performs a change process (Move operation) and calculation of the evaluation value E until the evaluation value E of the reproduced image converges at each of the repetition parameter values (temperature parameter values T) within the predetermined range. It is configured to repeat the above determination.
- the optimizing unit 50 includes a plurality of target image detection sensors (60A to 60C) each of a plurality of target images detected in a predetermined direction and a plurality of reproduced image detection sensors (40A to 40A).
- the reproduction image displayed on the reproduction image display unit 30 may be evaluated by comparing each of the plurality of reproduction images in the predetermined direction detected in the predetermined direction by the force 40C).
- the optimization unit 50 applies the optimal light wavefront control pattern by repeatedly applying the optimization method to each of the above-described target image in the predetermined direction and each of the above-described reproduced images in the predetermined direction. It is configured to generate Specifically, as shown in FIG. 5, the optimization unit 50 includes an initial light wavefront control pattern generation unit 51, a reproduced image data acquisition unit 52, a target image data acquisition unit 53, an evaluation value It comprises a calculation unit 54, an evaluation unit 55, an optimum optical wavefront control pattern storage unit 56, an optical wavefront control pattern changing unit 57, and an output unit 58. The specific functions of each unit will be described later.
- the optimization unit 50 of the optical wavefront control pattern generation device uses the “simulated annealing” method to display the reproduced image on the reproduced image display unit 30 by using the optical wavefront control unit.
- the operation of the control unit 20 for generating an optimal light wavefront control pattern (hologram) to be displayed on the lightwave front control device will be described.
- step S1001 the initial light wavefront control pattern generation unit 51 of the optimization unit 50 generates an initial light wavefront control pattern (initial solution of the light wavefront control pattern) A.
- the initial light wave The plane control pattern generation unit 51 generates an initial light wavefront control pattern A by assigning a random value of 0 to 255 to each pixel of the grayscale image on the liquid crystal panel.
- step S1001 the number of pixels is set to “
- the initial light wavefront control pattern A does not necessarily need to have a random value.
- step S1002 the output unit 58 of the optimization unit 50 outputs the initial optical wavefront control pattern.
- the initial optical wavefront control pattern A generated by the generator 51 is output to the optical wavefront controller 20.
- step S1002 the output unit 58 of the optimization unit 50 outputs the light wavefront control pattern A changed by the light wavefront control pattern changing unit 57 to the light wavefront control unit 20.
- step S1003 the illumination light 2 radiated by the illumination light irradiator 10 is applied to the light wavefront control pattern (A or A) displayed on the light wavefront control device of the lightwave front controller 20.
- the reproduced light 2 is modulated by 0 i and becomes a reproduced light 2, and the reproduced image display unit 30 displays a reproduced image based on the reproduced light 2.
- the reproduced image detecting unit 40 converts the reproduced image displayed on the reproduced image display unit 30 into a plurality of reproduced image detecting sensors (in the example of Fig. 7, the left camera 40A, the center camera 40B, and the left camera 40C).
- images are taken from various directions (three directions in the example of FIG. 7), and a plurality of (three in the example of FIG. 7) reproduced images are digitized.
- the unit 52 acquires a plurality of (three in the example of FIG. 7) digitized reproduced image data from each of the reproduced image detection sensors included in the reproduced image detection unit 40.
- the target image detecting section 60 detects the target B by a plurality of target image detecting sensors (in the example of FIG. 7, the left camera 60A, the center camera 60B, and the left camera 60C) in various directions (FIG. 7).
- a plurality of (three in the example of FIG. 7) target images captured are digitized, and the target image data acquiring unit 53 of the optimizing unit 50 is digitized.
- a plurality of (three in the example of FIG. 7) target image data is also acquired for each target image detection sensor force constituting the target image detection unit 60.
- the target image detecting sensors 60A to 60C for capturing the target image are used under the same conditions (type, arrangement, setting, etc.) as the reproduced image detecting sensors 40A to 40C for capturing the reproduced image. I decided to.
- step S1004a the evaluation value calculation unit 54 of the optimization unit 50 compares each of the acquired reproduced image data with each of the acquired target image data, and displays the reproduced image displayed on the reproduced image display unit 30.
- a reproduction image evaluation value E (reproduction image evaluation value E corresponding to the initial light wavefront control pattern A) indicating how close the image is to the target image is calculated.
- the evaluation value calculation unit 54 adds the absolute value of the difference between the luminance at each coordinate of the target image and the luminance at each coordinate of the reproduced image over all the coordinates to thereby evaluate the reproduced image. It may be configured to calculate the value E. In this case, it is assumed that the brightness of light at each coordinate of the reproduced image and the target image is digitally recorded by, for example, a value of 256 gradations in the target image data and the reproduced image data.
- the evaluation value calculation unit 54 calculates the difference between the corresponding data for each of the plurality of reproduced image data and the plurality of target image data, and calculates the sum of the large differences as the evaluation value E can do. In other words, when the evaluation value is “0”, the reproduced image completely matches the target image, and when the evaluation value is large, the reproduced image and the target image are significantly different. Become.
- the evaluation value calculation unit 54 includes a plurality of reproduced image data and a plurality of reproduced image data. The above evaluation value can be calculated without changing the target image data of
- the evaluation value calculation unit 54 includes a plurality of target image detection sensors (60A to 60C). To 60C) Force It is necessary to convert the acquired target image data into data captured under the same conditions (such as sensor type and arrangement) as the reproduced image data.
- the evaluation value calculation unit 54 evaluates the reproduction image by a predetermined method. To calculate the value E, it is necessary to convert the target image data.
- the evaluation value calculation unit 54 virtually creates a three-dimensional space model based on the acquired target image data, and measures the created three-dimensional space model with a reproduced image detection sensor. Calculate the data that would be output if Then, the evaluation value calculating unit 54 can evaluate the above-described reproduced image by evaluating the reproduced image data acquired from the reproduced image detecting sensor based on the calculated data.
- the evaluation unit 55 of the optimization unit 50 determines whether or not the light wavefront control pattern corresponding to the reproduced image has an improved force based on the calculated evaluation value E of the reproduced image. Improvement If it is determined that the operation has been performed (if “YES” in step S1004a), the operation proceeds to step S1004b, and if it is determined that the operation has not been improved (if “NO” in step S1004a) The operation proceeds to step S1006.
- Difference information ⁇ ⁇ ( ⁇ ) —E (A) between the evaluation values of the reproduced image before and after the light wavefront control pattern change processing.
- step S1004b the evaluating unit 55 determines whether the strong light wavefront control pattern A has an improved force compared to the optimum light wavefront control pattern stored in the optimum light wavefront control pattern storage unit 56. Judge about. If it is determined that the signal has been improved (if “YES” in step S1004b), the operation proceeds to step S1005, and if it is determined that V has not been improved (if “NO” in step S1004b), This operation proceeds to step S1009.
- step S1005 the evaluation unit 55 stores the strong light wavefront control pattern A in the optimum light wavefront control pattern storage unit 55 as an optimum light wavefront control pattern.
- step S1005 the evaluation unit 55 determines that the optical wavefront control pattern A is to be adopted as an optimal optical wavefront control pattern in the search range up to the present.
- the evaluation unit 55 performs the above-described determination for the initial optical wavefront control pattern A.
- the optimal optical wavefront control pattern is stored in the optimal optical wavefront control pattern storage unit 56 as the optimal optical wavefront control pattern.
- step S1006 the evaluation unit 55 calculates the adoption probability P indicating the probability of employing the local change process (Move operation) that has calculated the optical wavefront control pattern using Expression (1). .
- T indicates a temperature parameter value
- step S1007 based on the calculated adoption probability P, the evaluator 55 determines whether or not to use the local change process that has calculated the light wavefront control pattern A. [0080] The evaluator 55 performs the operation of step S1009 when it is determined to use the strong local change process, and performs the operation of step S1008 when it is determined not to use the strong local change process.
- step S1008 the light wavefront control pattern changing unit 46 returns the light wavefront control pattern A to the lightwave front control pattern A before the local change processing.
- step S1009 the evaluation unit 55 determines whether the evaluation value E of the reproduced image corresponding to the light wavefront control pattern converges with the current temperature parameter value T, and determines whether or not the force is sufficient. .
- the evaluation unit 55 determines whether or not a sufficient number of times of performing the local change processing is performed. This determination is made by the same method as that used in the conventional “Simulated Annealing” method.
- the evaluation unit 55 When it is determined that the evaluation value E of the reproduced image converges, the evaluation unit 55 performs the operation of Step S 1101, and determines that the evaluation value E of the reproduced image has not converged. If it has, the operation of step S1010 is performed.
- step S1012 the evaluator 55 determines whether or not the reconstructed image evaluation value E corresponding to the optical wavefront control pattern A has converged with the temperature parameter value T in a predetermined range (ambient temperature). I do.
- evaluation section 55 determines whether or not the temperature parameter value T has fallen to a sufficiently low value, that is, whether or not the force has performed the local change processing a sufficient number of times. This determination is made by the same method as that used in the conventional “Simulated Annealing” method.
- step S1013 when it is determined that the local change processing has been performed a sufficient number of times, the process proceeds to step S1013, and when it is determined that the local change processing has not been performed a sufficient number of times, Proceed to step S1010.
- step S1010 the light wavefront control pattern changing unit 46 of the optimizing unit 50 performs local change processing on the strong lightwave front control pattern A.
- the local change processing corresponds to the grayscale image on the liquid crystal panel described above.
- step S1013 the output unit 58 of the optimizing unit 50 outputs the light wavefront control pattern stored in the optimum light wavefront control pattern storage unit 56 as an optimum lightwave front control pattern.
- the updating of the temperature parameter T starts from a sufficiently high value (start temperature) and is sufficiently fine to a sufficiently low value (end temperature) so that a sufficient solution can be searched. It should be done at intervals (temperature increments), long enough, and over time (sufficient number of local changes, evaluations and adoption decisions for each temperature parameter T, ie trials).
- the evaluation unit 55 sets the start temperature to a sufficiently high temperature state (a temperature at which the adoption probability is almost "1" regardless of the evaluation value changed by the local change processing).
- Set the end temperature to a sufficiently low temperature (a temperature at which all the deteriorating operations are rejected), and set the temperature increment and the number of trials to the size of the problem (in this embodiment, the resolution of the light control pattern). Or the number of grayscale tones or the size of the space in which the reproduced image is displayed).
- the evaluation value calculation unit 54 calculates the evaluation value only for the portion where the reproduced image has changed as a result of performing the local change processing.
- the evaluation unit 55 may be configured to evaluate the reproduced image using the powerful evaluation value difference information ⁇ ⁇ .
- the spatial information (target image) of the object B detected by using the target image detection sensor and the reproduced image captured by using the reproduced image detection sensor Therefore, the spatial resolution of the sensor (the hologram) can be optimized by comparing with the method of acquiring the light interference fringes directly with a CCD camera or the like. Constraints such as spatial resolution) can be reduced.
- the optical wavefront control pattern generation device when the target image detecting sensor and the reproduced image detecting sensor are used under the same condition, the target image data is matched with the reproduced image data. This eliminates the need for conversion, and thus reduces the calculation time.
- an optimum optimization method is applied to each of the plurality of target image data and each of the plurality of reproduction image data by repeatedly applying the optimization method. Since the optical wavefront control pattern is generated, it is possible to optimize even a powerful part (intermediate image) acquired by the target image detecting sensor and the reproduced image detecting sensor, and the conventional stereoscopic / Compared to multi-view, it can represent continuous stereoscopic images that can be observed from more angles.
- the optical wavefront control pattern generation device when acquiring a plurality of reproduced images using a plurality of reproduced image detection sensors 40A to 40C, includes a plurality of reproduced images.
- the reconstructed image detecting sensors 40A to 40C are arranged at different viewpoint positions to acquire a plurality of reconstructed images.
- the reproduced images acquired by the adjacent reproduced image detecting sensors include common information. Therefore, by optimizing both the reproduced images acquired by the adjacent reproduced image detection sensors, the reproduced image (intermediate image) acquired from a viewpoint position that is not normally an evaluation target is also adjacent to the reproduced image. It is optimized as a reconstructed image having information common to the reconstructed image acquired by the matched reconstructed image detecting sensor.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Holo Graphy (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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EP05737165.0A EP1752839B1 (en) | 2004-04-26 | 2005-04-26 | Optical wavefront control pattern generating apparatus and optical wavefront control pattern generating method |
US11/587,637 US8022344B2 (en) | 2004-04-26 | 2005-04-26 | Optical wavefront control pattern generating apparatus and optical wavefront control pattern generating method |
Applications Claiming Priority (4)
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JP2004130243 | 2004-04-26 | ||
JP2004-130243 | 2004-04-26 | ||
JP2005-113419 | 2005-04-11 | ||
JP2005113419A JP4718223B2 (ja) | 2005-04-11 | 2005-04-11 | 光波面制御パターン生成装置及び光波面制御パターン生成方法 |
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WO2005103840A1 true WO2005103840A1 (ja) | 2005-11-03 |
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PCT/JP2005/007920 WO2005103840A1 (ja) | 2004-04-26 | 2005-04-26 | 光波面制御パターン生成装置及び光波面制御パターン生成方法 |
Country Status (5)
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US (1) | US8022344B2 (ja) |
EP (1) | EP1752839B1 (ja) |
KR (1) | KR100855291B1 (ja) |
TW (1) | TW200608162A (ja) |
WO (1) | WO2005103840A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100855291B1 (ko) * | 2004-04-26 | 2008-08-29 | 가부시키가이샤 엔.티.티.도코모 | 광 파면 제어 패턴 생성 장치 및 광 파면 제어 패턴 생성방법 |
Families Citing this family (6)
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JP2005338787A (ja) * | 2004-04-26 | 2005-12-08 | Ntt Docomo Inc | 光波面制御パターン生成装置及び光波面制御パターン生成方法 |
FR2937748B1 (fr) * | 2008-10-24 | 2011-12-02 | Thales Sa | Dispositif de controle d'une chaine video comprenant un projecteur holographique |
US20110181728A1 (en) * | 2008-12-19 | 2011-07-28 | Delphi Technologies, Inc. | Electronic side view display system |
GB2468911A (en) * | 2009-03-27 | 2010-09-29 | Light Blue Optics Ltd | Aberration correction methods using wavefront sensing hologram patches and mapping of phase aberration corrections |
RU2014104445A (ru) * | 2014-02-07 | 2015-08-20 | ЭлЭсАй Корпорейшн | Формирования изображения глубины с использованием информации о глубине, восстановленной из амплитудного изображения |
WO2022154803A1 (en) * | 2021-01-15 | 2022-07-21 | Google Llc | System and method for simulating light-in-flight |
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JPH0635392A (ja) * | 1992-07-20 | 1994-02-10 | Fujitsu Ltd | 立体表示装置 |
JP3795953B2 (ja) | 1996-02-29 | 2006-07-12 | 浜松ホトニクス株式会社 | ホログラフィ撮像装置、ホログラフィシステムおよびホログラフィ表示方法 |
JPH11337737A (ja) | 1998-05-25 | 1999-12-10 | Mitsubishi Chemical Corp | 位相変調型光学素子及びその製造方法 |
US6827442B2 (en) * | 2001-09-12 | 2004-12-07 | Denwood F. Ross | Ophthalmic wavefront measuring devices |
JP4247371B2 (ja) | 2002-07-05 | 2009-04-02 | 財団法人生産技術研究奨励会 | 三次元データ取得装置 |
US7113268B2 (en) * | 2004-01-12 | 2006-09-26 | The Boeing Company | Scintillation tolerant optical field sensing system and associated method |
KR100855291B1 (ko) * | 2004-04-26 | 2008-08-29 | 가부시키가이샤 엔.티.티.도코모 | 광 파면 제어 패턴 생성 장치 및 광 파면 제어 패턴 생성방법 |
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2005
- 2005-04-26 KR KR1020067022304A patent/KR100855291B1/ko not_active IP Right Cessation
- 2005-04-26 TW TW094113287A patent/TW200608162A/zh not_active IP Right Cessation
- 2005-04-26 EP EP05737165.0A patent/EP1752839B1/en not_active Expired - Fee Related
- 2005-04-26 WO PCT/JP2005/007920 patent/WO2005103840A1/ja active Application Filing
- 2005-04-26 US US11/587,637 patent/US8022344B2/en not_active Expired - Fee Related
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JPH01319085A (ja) * | 1988-06-20 | 1989-12-25 | Nippon Telegr & Teleph Corp <Ntt> | ホログラフィ伝送方式 |
JPH10186283A (ja) * | 1996-11-01 | 1998-07-14 | Hamamatsu Photonics Kk | 画像形成装置 |
JPH11337733A (ja) * | 1998-05-28 | 1999-12-10 | Sumitomo Bakelite Co Ltd | 複屈折板及びその作製方法 |
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Also Published As
Publication number | Publication date |
---|---|
US8022344B2 (en) | 2011-09-20 |
TWI297108B (ja) | 2008-05-21 |
EP1752839B1 (en) | 2013-12-04 |
EP1752839A4 (en) | 2009-12-02 |
US20080246849A1 (en) | 2008-10-09 |
TW200608162A (en) | 2006-03-01 |
KR20070004062A (ko) | 2007-01-05 |
EP1752839A1 (en) | 2007-02-14 |
KR100855291B1 (ko) | 2008-08-29 |
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