Computer-generated holography three-dimensional display method and system capable of reducing reproduced waste information

A three-dimensional display and computational holographic technology, applied in the direction of instruments, can solve the problems of difficult to realize dynamic three-dimensional display, low accuracy of occlusion relationship, insufficient space bandwidth product, etc., to reduce the reproduction of wasteful information, reduce the amount of computing data, The effect of reducing the number of stitches

Active Publication Date: 2018-05-01
SUZHOU UNIV
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Based on the principle of volumetric 3D display voxel point scanning and viewpoint tracking, it overcomes the shortcomings of the existing computational holographic 3D display technology, such as insufficient spatial bandwidth product, large amount of computing data, low accuracy of occlusion relationship, and difficulty in realizing dynamic 3D display. Design a computational holographic 3D display system based on the spatial light modulator and viewpoint tracking recognition module that can reduce the reproduction of wasteful information and represent the occlusion relationship of 3D object reproduction images, and realize the computational holographic dynamic 3D display that can reduce the reproduction of wasteful information

Method used

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  • Computer-generated holography three-dimensional display method and system capable of reducing reproduced waste information
  • Computer-generated holography three-dimensional display method and system capable of reducing reproduced waste information
  • Computer-generated holography three-dimensional display method and system capable of reducing reproduced waste information

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Embodiment 1

[0035] Embodiment 1: A computational holographic three-dimensional display method capable of reducing wasted information reproduction, comprising the following steps:

[0036] 1) Human eye tracking identification step: when the human eye observes the holographic reconstructed image of the spatial light modulator, the human eye tracking sensor is used to obtain the human eye observation position 3, and the obtained human eye observation position information is transmitted to the computer;

[0037] 2) Step of designing a primitive hologram: decompose the three-dimensional object into a series of voxel points, the voxel point is the smallest component unit of the three-dimensional object, and search out the position information of the human eye according to the position information of the human eye obtained in step 1). All voxel points that can be observed within the field of view angle range at the position, design the digital Fresnel lens corresponding to each voxel point accord...

Embodiment 2

[0045] Embodiment 2: A computational holographic three-dimensional display method capable of reducing the reproduction of wasteful information, comprising the following steps: on the basis of Embodiment 1, adding a digital grating to the elementary hologram in step 2), The computational hologram synthesized by digital Fresnel lens and digital grating can precisely control the position coordinates of voxel points in three-dimensional space, and realize the accurate positioning of voxel points. Such as figure 2 As shown, the computational sub-hologram is composed of the primitive hologram of voxel points that can be effectively observed at the observation position of the human eye, in which the digital Fresnel lens and the digital grating can be obtained by encoding, and by changing the digital Fresnel lens The focal length can precisely control the vertical position of the voxel point, and the horizontal position of the voxel point can be adjusted by changing the period and or...

Embodiment 3

[0049] Embodiment 3: A calculation holographic three-dimensional display method that can reduce the reproduction of wasteful information. On the basis of Embodiment 2, it is further: in the step 2), each voxel is determined according to the occlusion relationship between each voxel point The propagation direction of the point, the occlusion relationship is realized by programmatically cutting the primitive hologram, such as image 3 shown. The way of cutting is to set the hologram gray level corresponding to the occluded information of each voxel point to a fixed value on the primitive hologram, where the hologram corresponding to the occluded information should be understood as the hologram corresponding to the voxel point For a part of the area on the elementary hologram, when the occluder is opaque, the hologram grayscale corresponding to the occluded information of each voxel point is set to zero on the elementary hologram; when the occluder is partially transparent , the...

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Abstract

The invention belongs to the field of holography and three-dimensional display, and particularly relates to a computer-generated holography three-dimensional display method and system. A human eye observation position is traced and identified by a human eye tracking sensor, three-dimensional object information received within the human eye observation position is only reproduced, the strength, theposition and the propagation direction of a voxel point are accurately controlled by a mode that a reproduced voxel point of a hologram is loaded by a spatial light modulator, a gray value of the hologram corresponding to shielded information of each voxel point is set, so that a shielding relation of the voxel point is correctly expressed, dynamic three-dimensional display can be achieved by combining the spatial light modulator to refresh and load the computer-generated hologram, the method is simultaneously and suitably used for three-dimensional real image display and three-dimensional virtual image display, the computer-generated holography dynamic three-dimensional display capable of reducing reproduced waste information can be achieved, the operation data volume is reduced, and theshielding relation of a reproduced image of a three-dimensional object can be correctly expressed.

Description

technical field [0001] The invention belongs to the field of calculation holography and three-dimensional display, and in particular relates to a calculation holography three-dimensional display method and system. Background technique [0002] With the development of science and technology and the advancement of social needs, 3D display technology has penetrated into all aspects of human life and has gradually become a research hotspot. Holographic 3D display is a wavefront reconstruction technology of 3D objects. Its principle is to use the principle of holographic recording and reproduction to reconstruct all the information of 3D objects (including amplitude information and phase information), which can provide all the stereoscopic perception required by human eyes, and Viewers can watch stereoscopic images without wearing any visual aids, which is a very promising true three-dimensional display technology. Computational holographic 3D display uses spatial light modulato...

Claims

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Application Information

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IPC IPC(8): G03H1/22
CPCG03H1/2202
Inventor 苏衍峰吴建宏施玲燕陈海东
Owner SUZHOU UNIV
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