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Hologram compression method, encoder and reproduced image output system

A compression method and hologram technology, applied in image communication, stereo system, electrical components, etc., can solve problems such as difficult holograms, uneven distribution of high-frequency information, weak pixel correlation, etc., and achieve strong application prospects and strong innovation Sex and practicality, the effect of remarkable effect

Active Publication Date: 2020-01-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing JPEG and JPEG2000 encoding standards have high compression efficiency for ordinary digital images, and because holograms are composed of interference fringes containing a large number of different bright spots, compared with ordinary images, they have weak pixel correlation and high-frequency information distribution. Inhomogeneity and other characteristics, the existing image compression methods are difficult to effectively apply to holograms
In addition, the final display output is the reconstructed image of the hologram instead of the hologram, so the existing image and video codec framework cannot be used for the data stream output of the hologram

Method used

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Effect test

Embodiment 1

[0053] Embodiment 1: as figure 1 As shown, a hologram compression method, including:

[0054] Perform Fourier transform on the original hologram to obtain the spectrum corresponding to the hologram, and determine the spectrum matrix;

[0055] Extracting its amplitude and phase matrix according to the spectrum matrix;

[0056] Decomposing the amplitude and phase matrices by discrete wavelet transform in one or more stages to obtain sub-matrices of each layer separated by high frequency and low frequency;

[0057] The discrete wavelet transform decomposition mode includes wavelet packet Mallat decomposition and a new wavelet decomposition method;

[0058] like figure 2 and image 3 As shown, the first-level decomposition of wavelet packet Mallat decomposes the matrix into four components: high-frequency, low-frequency horizontal, low-frequency vertical and low-frequency diagonal; the third-level decomposition is based on the first-level decomposition, and then decomposes th...

Embodiment 2

[0068] Embodiment 2: as Figure 7 As shown, the hologram encoder includes:

[0069] The reading module is used to read the input hologram and various parameters of the hologram;

[0070] The preprocessing module is used to read in various data of the hologram, retain the hologram in the form of a pixel matrix, and determine whether the read image is a grayscale image or a true color image;

[0071] A processing module, configured to determine two types of thresholds corresponding to the amplitude and phase matrices of each layer after wavelet transform according to the hologram spectrum amplitude phase separation and the wavelet transform and threshold processing; according to the threshold and the processed amplitude and phase matrix to reconstruct a new hologram;

[0072] An encoding module, configured to determine a compressed hologram obtained by quantization compression encoding according to the new hologram obtained by the processing and the chromaticity set obtained a...

Embodiment 3

[0080] Embodiment 3: as Figure 8 As shown, the hologram reproduction image output system includes:

[0081] A data read-in module, used for reading in the compressed hologram code stream;

[0082] A decoding module, configured to perform entropy decoding according to the read code stream and the entropy decoding type, to obtain a compressed hologram;

[0083] The reproduction module is used to generate a reproduction image of the hologram according to the compressed hologram and in combination with the diffraction calculation theory;

[0084] The output module is used to generate a reproduced image code stream according to the reproduced image of the hologram to provide to the display device, and the reproduced image code stream is common image pixel matrix data.

[0085] like Figure 9 As shown, in a possible implementation, the reproduction module and the reproduction image code stream may not be output, but the compressed hologram obtained by entropy decoding is directl...

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Abstract

The invention relates to a hologram compression method, an encoder and a reproduced image output system, and belongs to the field of hologram image processing and three-dimensional display. The hologram compression method includes: decomposing the hologram frequency spectrum into an amplitude and phase matrix, and decomposing the amplitude and phase matrix by using wavelet packet Mallat decomposition and a wavelet novel decomposition mode to obtain a high-low frequency separated sub-matrix; obtaining wavelet layering or a global threshold value according to the high-frequency and low-frequencyseparated sub-matrixes; taking the threshold value as the amplitude and phase matrixes, and then recombining the two processed matrixes into a new hologram frequency spectrum so as to generate a newhologram; processing the new hologram by utilizing vector quantization to finish compression. The holographic image encoder comprises a read-in module, a preprocessing module, a processing module andan entropy encoding module. Compression encoding of a hologram is completed on the basis of the holographic image compression method. The holographic reproduced image output system comprises a data read-in module, a decoding module, a reproducing module and an output module, and can provide decoding and reproduced image code stream output functions.

Description

technical field [0001] The invention relates to a hologram compression method, an encoder and a reproduced image output system, belonging to the fields of holographic image processing and three-dimensional display. Background technique [0002] The application of holographic imaging technology makes true three-dimensional display possible, which is the key to the new generation of display technology. Traditional 3D displays are mostly "pseudo 3D" based on the binocular parallax of human eyes. In contrast, holographic 3D displays can restore real scenes and bring people an unparalleled visual experience. At the same time, the holographic 3D display can provide continuous head movement parallax, natural vergence adjustment of the human eye and all depth prompts of the object field, eliminating the fatigue of the human eye and dizziness in the heart. Since the holographic image records all the information of the object field, it contains a huge amount of data, which is very un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N13/161H04N13/30H04N19/42H04N19/597H04N19/63H04N19/91
CPCH04N13/161H04N13/30H04N19/42H04N19/597H04N19/63H04N19/13H04N19/91
Inventor 姜智翔桂进斌王国庆张凯浦建
Owner KUNMING UNIV OF SCI & TECH
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