A kind of hologram compression method, encoder and reproduced image output system

A compression method and hologram technology, applied in image communication, stereo system, digital video signal modification, etc., can solve the problems of difficult hologram, weak pixel correlation, uneven distribution of high-frequency information, etc., to achieve strong application prospects, The effect of remarkable effect, strong innovation and practicality

Active Publication Date: 2021-10-22
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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  • A kind of hologram compression method, encoder and reproduced image output system
  • A kind of hologram compression method, encoder and reproduced image output system
  • A kind of hologram compression method, encoder and reproduced image output system

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Embodiment 1

[0049] Embodiment 1: as figure 1 As shown, a hologram compression method, including:

[0050] Perform Fourier transform on the original hologram to obtain the spectrum corresponding to the hologram, and determine the spectrum matrix;

[0051] Extracting its amplitude and phase matrix according to the spectrum matrix;

[0052] 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;

[0053] The discrete wavelet transform decomposition mode includes wavelet packet Mallat decomposition and a new wavelet decomposition method; the new wavelet decomposition mode is based on the wavelet transform Mallat decomposition, and the three groups of high-frequency components after the first-level decomposition The group with the largest proportion of frequency energy is decomposed again, and the number of decomposition layers is consistent with the number of decompos...

Embodiment 2

[0061] Embodiment 2: as Figure 4 As shown, a hologram encoder, including:

[0062] The reading module is used to read the input hologram and various parameters of the hologram;

[0063] 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;

[0064] A processing module, configured to determine a new hologram according to a hologram compression method; that is, according to the hologram spectrum amplitude phase separation and the wavelet transform and threshold processing, determine two types of thresholds corresponding to the amplitude and phase matrices of each layer after wavelet transform ; Reconstruct a new hologram according to the threshold and the processed amplitude and phase matrix;

[0065] An encoding module, configured to determine a compressed hologram obtained by quantization compression encoding according to th...

Embodiment 3

[0073] Embodiment 3: as Figure 5 As shown, a hologram reconstruction image output system includes:

[0074] A data read-in module, used for reading in the compressed hologram code stream; the compressed hologram code stream is obtained by a hologram compression method and a hologram encoder;

[0075] The decoding module is used to perform entropy decoding according to the read code stream to obtain the compressed hologram;

[0076] 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;

[0077] The output module is configured 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.

[0078] Such as Figure 6 As shown, in a possible implementation, the reproduction module and the reproduction image code stream may...

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Abstract

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. Decompose the hologram spectrum into amplitude and phase matrices, use wavelet packet Mallat decomposition and a new wavelet decomposition mode to decompose the amplitude and phase matrices, and obtain high and low frequency separated sub-matrices; obtain wavelet layering according to the high and low frequency separated sub-matrix Or the global threshold, the threshold is applied to the amplitude and phase matrices, and then the processed two matrices are recombined into a new hologram spectrum to generate a new hologram; the new hologram is processed by vector quantization to complete the compression; the holographic image encoder contains : a read-in module, a preprocessing module, a processing module and an entropy coding module, which complete the compression coding of the hologram on the basis of the shown hologram compression method; the holographic reproduction image output system includes a data read-in module, a decoding module, a reproduction module and The output module can provide decoding and reproduction image stream output function.

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 Patents(China)
IPC IPC(8): H04N13/161H04N13/30H04N19/42H04N19/597H04N19/63H04N19/91
CPCH04N19/13H04N19/42H04N19/597H04N19/63H04N19/91H04N13/161H04N13/30
Inventor 姜智翔桂进斌王国庆张凯浦建
Owner KUNMING UNIV OF SCI & TECH
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