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Compression method and device of peak data in three-dimensional image data

A vertex data, three-dimensional image technology, applied in image data processing, image communication, image coding and other directions, can solve the problems of affecting compression efficiency, wasting time, unable to save codeword storage space, etc., to reduce the total number of codewords, improve Encoding quality, the effect of reducing search time

Active Publication Date: 2013-09-11
ZTE CORP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, when the compressed codebook is preset, a large number of codewords with very close Euclidean distances will be stored in the compressed codebook, so when obtaining the best matching codeword, it will waste time to traverse a large number of similar codewords and calculate , therefore, affects the compression efficiency of vertex data; and, because a large number of similar codewords can increase the quantity of codeword index value, thereby, make the bit (Bit) number of codeword index value increase, and then make the compression result by vertex data and The compression ratio of the vertex data calculated by the Bit ratio of the residual vector cannot be improved
[0006] It can be seen that the current existing compression methods for vertex data do not fully utilize the distribution characteristics of vertex data in three-dimensional image data, resulting in the inability to save codeword storage space, improve encoding quality, and improve the compression ratio of vertex data, and affect compression efficiency

Method used

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  • Compression method and device of peak data in three-dimensional image data
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Embodiment 1

[0077] Embodiment 1, assuming that the residual vector is divided into three groups, the grouping ratios are 85%, 10% and 5% respectively, and the code word search method is the FS method, then the compression method of the vertex data in the three-dimensional image data of the present invention is realized, Include the following steps:

[0078] Step 401: Generate residual vectors using 3D image data dedicated to generating compressed sub-codebooks.

[0079] Step 402: Divide the residual vector into three groups of residual vectors, and record the grouping threshold.

[0080] Specifically, the residual vectors in the residual vector set are arranged in ascending order of modulus value, and the distribution ratios are 85%, 10% and 5%, respectively, and the residual vectors are extracted from the residual vector set one by one to form A subset of residual vectors, and record grouping thresholds.

[0081] Step 403: Using the three sets of residual vectors, generate three sets o...

Embodiment 2

[0085] Embodiment 2, assuming that the residual vector is divided into three groups, the grouping ratios are 85%, 10% and 5% respectively, and the code word search method is a fast search method, then the compression method of the vertex data in the three-dimensional image data of the present invention is realized , including the following steps:

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Abstract

The invention discloses a compression device of peak data in three-dimensional image data. The compression device comprises a code book design module and a codon search module, wherein the code book design module is used for grouping residual vectors of the peak data in the code book design three-dimensional image data, generating compressed sub-code books which are composed of a certain number of codons and correspond to residual vectors in each group and sending the compressed sub-code books in each group to the codon search module, and the codon search module is used for receiving the compressed sub-code books sent by the code book design module, sequentially selecting optimum matching codons for the residual vectors of the peak data in the three-dimensional image data to be compressed and taking codon index values of the optimum matching codons and the index value of the compressed sub-code book where the peak data are located as a compression result of the peak data. Meanwhile, the invention further discloses a compression method of the peak data in the three-dimensional image data. According to the compression device and method of the peak data in the three-dimensional image data, storage space of the codons can be saved, coding quality can be improved, the compression ratio of the peak data can be improved, and compression efficiency can be improved.

Description

technical field [0001] The invention relates to data compression technology in the field of three-dimensional image processing, in particular to a method and device for compressing vertex data in three-dimensional image data. Background technique [0002] With the development of image processing technology, more realistic 3D images have gradually become a hot spot in image data processing. An important technology in 3D image data processing is compression technology. The compression of 3D image data includes two parts: the compression of vertex connection relation data and the compression of vertex data; among them, the compression method of vertex connection relation data has now been able to make vertex connection The compression efficiency of relational data is close to the theoretical limit value, so the compression method of vertex data in 3D image data becomes an important factor affecting the compression efficiency of 3D image data. [0003] The current compression m...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/46
CPCG06T9/008H04N19/94G06T9/001H04N13/161
Inventor 贺菲菲惠剑孙庚茂高峰潘志斌李达李敬源
Owner ZTE CORP