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Prediction-based three-dimensional mesh coding method

A technology of three-dimensional grid and coding method, applied in the field of image processing, can solve the problems of low image quality, difficult to compress and encode, weak correlation between adjacent pixels, etc.

Inactive Publication Date: 2012-08-01
BEIJING UNIV OF TECH
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Problems solved by technology

However, the correlation between adjacent pixels of the normal vector image is very weak, and it contains rich detail information, so it is not easy to compress and encode. The quality of the final image is not high, and it is difficult to express the realism of the reconstructed 3D mesh model in the drawing stage

Method used

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  • Prediction-based three-dimensional mesh coding method
  • Prediction-based three-dimensional mesh coding method
  • Prediction-based three-dimensional mesh coding method

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Embodiment Construction

[0033] Such as figure 1 and 2 As shown, this prediction-based 3D grid encoding method includes encoding and decoding, and the encoding uses an encoder and includes the following steps:

[0034] (E1) generating an original geometric image, an original normal vector texture image;

[0035] (E2) encoding and compressing the original geometric image to generate the code stream of the original geometric image, and outputting it;

[0036] (E3) generating a predicted normal vector texture image according to the code stream of the original geometric image;

[0037] Decoding utilizes a decoder and includes the following steps:

[0038] (D1) decoding the code stream of the original geometric image received by the decoding end to generate a reconstructed geometric image;

[0039] (D6) reconstructing a three-dimensional mesh model according to the decoded geometric image and the reconstructed normal vector texture image;

[0040] On the encoding side, the following steps are also inc...

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Abstract

The invention discloses a prediction-based three-dimensional mesh coding method. In the method, when predicting a normal vector texture image, the relativity between a geometry image and the normal vector texture image and the relativity among three components of the normal vector texture image are fully considered, the quality of the predicted normal vector texture image is high, and thus the predicted residual is small, which facilitates coding and transmission; and the quality of the decoded normal vector texture image is improved greatly, a third-dimension effect of the reconstructed three-dimensional mesh model is upgraded, and users can get excellent visual experience.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a prediction-based three-dimensional grid coding method. Background technique [0002] With the development of 3D scanning and modeling technology, 3D mesh has become a new type of multimedia data after sound, image and video. Due to the rapid increase in the size and complexity of 3D grid data, it has brought great pressure to the storage, processing, network transmission and browsing of 3D grids. Therefore, efficient compression of 3D meshes is necessary. [0003] Three-dimensional mesh compression was first proposed in 1995, so it is a new and rapidly developing research topic. Three-dimensional grid compression can be divided into two types: irregular grid coding and heavy grid coding according to whether the original topology connection relationship is changed. Preserving the original topological connections is very important for accurately reconstruc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N13/00H04N7/26H04N7/32
Inventor 施云惠李敬华文波齐娜
Owner BEIJING UNIV OF TECH
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