Three-dimension graphic data compression processing method

A technology of three-dimensional graphics and compression processing, applied in image data processing, image coding, instruments, etc., can solve the problem that compression performance and transmission performance cannot be well adapted and satisfied, computer storage and network transmission capabilities are limited, and model data cannot be satisfied Real-time transmission and other issues to meet the needs of rapid development and applications, the compression effect has a small distortion rate, and the effect of ensuring realism and intuition

Inactive Publication Date: 2008-02-13
广东中大讯通软件科技有限公司 +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] However, the current computer storage and network transmission capabilities are relatively limited, especially the network transmission bandwidth, which is far from being able to meet the real-time transmission of model data.
The development and promotion of 3D display technology is limited by transmission bandwidth and storage space, because the amount of information that 3D models can accommodate has far exceeded that of 2D forms, and the storage and transmission of these models requires a lot of space and bandwidth, which is beyond the current development level of hardware and network
In terms of data compression technology, the method of using triangular meshes for compression processing is usually used at present, and its compression performance and transmission performance cannot well adapt to and meet the rapid development of current acquisition technology and the needs of applications.

Method used

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  • Three-dimension graphic data compression processing method

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Embodiment 1

[0043] Figures 1 to 9 show one of the embodiments of the three-dimensional graphics data compression processing method of the present invention, as shown in Figure 1, comprising the following steps:

[0044] a) Obtain the initial scan grid of the appearance of the model;

[0045] b) Regularize the initial scanning grid through the regrid module, so that the obtained new grid has subdivision continuity and supports topological information to simplify operations;

[0046]c) By subdividing the wavelet construction module, splitting, predicting, updating and merging the new grid information data to realize the decomposition and reconstruction process of the grid information data, so as to obtain the image after wavelet transformation;

[0047] d) construct the wavelet zero tree in the form of upper and lower layers and quadtrees related to wavelet coefficients through the zero tree compression module;

[0048] e) Quantize and compress the obtained wavelet zero tree by the EZW met...

Embodiment 2

[0093] Fig. 10 and Fig. 11 show the second embodiment of the three-dimensional graphics data compression processing method of the present invention, which is different from the first embodiment in that: in the construction of the zero tree, the corresponding relationship of the sides is as shown in Fig. 10, and the upper quadrilateral The edge of patch mesh A corresponds to the two edges 1 and 2 in the middle of the lower mesh B, and the two edges 3 and 5 on the same side parallel to edges 1 and 2 in the middle. The corresponding relationship of the points is shown in Figure 11. The vertices of the quadrilateral mesh grid A on the upper layer correspond to the midpoint 6 of the edge taken by the lower mesh B, the midpoint 8 of the edge that is 90 degrees to the entire edge taken, and The middle point 7 of each patch. In this case, in the middle of the patch, the edges and points form a 1-4 correspondence; when there is an empty correspondence at the boundary of the patch, the ...

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Abstract

The invention discloses a method of three-dimension image data compressing and processing. Regular quadrilateral surfaces are used instead of triangle surfaces, and the steps of re-gridding, subdivided wavelet construction, zero-tree compressing and entropy coding are used for compressing the image data, so a quadrilateral surface based geometric image compressing method is provided. The invention can better adapt and fulfill the requirements of quick development of the three-dimension displaying data collecting technologies and application of the technologies. The invention can help achieving a better compressing effect for complex models, the models can be gradually transmitted, and the distortion ratio is small, controllable and adjustable. Prior available storing and transmitting capacities can be better used to reduce limits and influences of prior hardware and network facilities to three-dimension display technologies.

Description

technical field [0001] The invention relates to the technical field of data compression processing, in particular to a compression processing method for three-dimensional graphic data. Background technique [0002] The development of computer graphics and hardware technology has brought a visual revolution to people. With the development of technology, the traditional two-dimensional representation can no longer meet people's needs, and people have put forward higher requirements for the computer's interaction and performance capabilities. It is the general trend to use three-dimensional information technology to represent various scenes. Compared with two-dimensional media representations such as text, images, and videos, three-dimensional graphic display has the characteristics of stronger sense of reality, better intuitiveness and more flexible interaction, especially in occasions that emphasize intuitiveness and interactive capabilities, such as engineering Three-dimens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T9/00
Inventor 陈任罗笑南
Owner 广东中大讯通软件科技有限公司
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