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A method and device for compressing vertex 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 problems such as affecting compression efficiency, wasting time, and increasing codeword index value bits, reducing the total number of codewords and improving Encoding quality, the effect of improving compression efficiency

Active Publication Date: 2016-12-14
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A method and device for compressing vertex data in three-dimensional image data
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  • A method and device for compressing vertex 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 present invention discloses a compressed device of the top data in the three -dimensional image data, including: code book design module, which is used to group the residual vector of the punch data in the 3D image data in the codebook design, and generates corresponding to the residual vectors of each group.The compressed sub -code book consisting of the specified quantity code word sends the compressed sub -code book of each group to the code search module; the code word search module is used to receive the compressed sub -code book sent by the codebook design module, and it is waiting in turn to wait in orderThe residual vector of the top -point data in the compressed 3D image data is selected to select the best matching code word, and the index value of the best matching code word is an index value of the code word, and the index value of the compressed sub -book is used as the compression result of the vertex data.The present invention also disclosed the compression method of top -point data in the three -dimensional image data. It adopts the storage space of the conservation of code words, improves coding quality, improves the compression ratio of vertex data, and improves compression efficiency.

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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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/597H04N19/56H04N19/587
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