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Acquisition method of synthetic hologram

A collection method and hologram technology, applied in the direction of image communication, color TV parts, TV system parts, etc., can solve problems such as the complexity of synthetic hologram technology, achieve reduced collection complexity, simple system structure, increase The effect of computing speed

Active Publication Date: 2015-09-23
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a new hybrid optimization method to overcome and solve the complexity problem of synthetic holography in the process of collecting two-dimensional projection images

Method used

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  • Acquisition method of synthetic hologram
  • Acquisition method of synthetic hologram
  • Acquisition method of synthetic hologram

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Experimental program
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specific Embodiment approach

[0032] 1) Build a four-camera image acquisition platform:

[0033] Establish a four-camera image acquisition platform, place the four cameras in a square, the four cameras are the four vertices of the square, and the lens directions of the four cameras should be consistent, so that the collected four images are as horizontal as possible. collection platform such as figure 1 As shown, there are four cameras in solid lines, which represent the placement of the four cameras, and it can be seen that they are placed in a square. The dotted camera represents the image position of the virtual viewpoint that needs to be generated, and the subsequent steps will be described in detail. Since the acquisition platform completely uses an ordinary camera, compared with the digital holographic system that uses laser to record holograms, the recording conditions of this method are relaxed, and true color recording can be directly performed.

[0034] 2) Calibrate and correct the camera so th...

Embodiment

[0065] An example of an improved synthetic hologram based on the three-dimensional Fourier spectrum is Figure 5-8 shown. Figure 5 is a three-dimensional primitive object, Figure 6 In order to utilize the improved acquisition method, a two-dimensional projection image is made on a three-dimensional object, wherein a part of the image is acquired. Figure 7 for synthetic holograms. Figure 8 In order to reproduce the results, the reproduction distances are z=190cm, z=200cm, z=210cm.

[0066] The successful examples of synthetic holographic technology show that the optimization of the synthetic holographic acquisition system can be realized by using all the intermediate viewpoints generated by the virtual viewpoint algorithm. The two-dimensional projection images to be collected are reduced from hundreds or dozens to four, and the intermediate viewpoint is generated by computer to achieve the purpose of simplifying the system and reducing costs, and at the same time provide...

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Abstract

Provided is a collecting method of a resultant hologram. The method comprises the steps that an image collecting platform with four cameras is built; the cameras are signed and corrected so that collected images can be located in a horizontal state, and meanwhile a parameter matrix of each camera is obtained; the collecting platform with the four cameras right faces a required article or scene, and the images of the required article or scene are collected; disparity maps of the four collected images are calculated by means of a stereo matching algorithm; according to the disparity map of every two images and the parameter matrix of each camera, a virtual viewpoint image between every two adjacent cameras is generated; four collected reference viewpoint images and the virtual viewpoint images generated in a virtual mode are combined into the resultant hologram; reappearing and displaying are conducted on the resultant hologram. According to the method, a system is simple in structure, and the fixed collecting system is convenient to build; signing accuracy is achieved, a depth camera is omitted, and cost is relatively reduced; under the circumstance that recording and reappearing quality is not affected, collecting complexity is reduced, system cost is lowered, and calculating speed is increased.

Description

technical field [0001] The invention provides a new method for collecting synthetic holograms, and in particular relates to related methods such as stereo matching and virtual viewpoint generation in stereo vision technology. Background technique [0002] In 2001, Li, Abookasis and Rosen et al. invented the technology of synthesizing holograms using multi-view projection images, which is called multiple viewpoint projection holography (MVP). Compared with traditional holograms, the recording of synthetic holograms does not require lasers, the recording conditions are loose, and the color objects are directly recorded by the camera, which provides the possibility for real-time recording and reproduction of real three-dimensional color objects. [0003] The main problem existing in this technology, and also the main problem studied by foreign scholars, is how to reduce the complexity of the information collection system in the synthetic holographic production process. The pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N13/00H04N5/74
Inventor 杨光临王晓川
Owner PEKING UNIV
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