Bidirectional texture function compressing and synthesizing method

A technology of bidirectional texture function and synthesis method, which is applied in image data processing, 3D image processing, instruments, etc., can solve problems such as enlargement, and achieve the effect of good effect, consistency and high speed.

Inactive Publication Date: 2009-04-01
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

[0009] The technical problem of the present invention is to overcome the deficiencies of the prior art and provide a method for compressing and synthesizing bidirectional texture functions, which can compress large-scale bidirectional texture function data and synthesize new multi-dimensional text

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  • Bidirectional texture function compressing and synthesizing method
  • Bidirectional texture function compressing and synthesizing method
  • Bidirectional texture function compressing and synthesizing method

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Embodiment Construction

[0017] If the two-way texture function texture is regarded as a collection of a large number of two-dimensional textures and two-dimensional texture synthesis is performed on each texture separately, the color values ​​of the pixels in each texture are different due to the difference in illumination and line of sight, and a unified synthesis effect cannot be obtained. The invention uses the compressed bidirectional texture function texture as a unified multi-dimensional texture, and performs multi-dimensional texture synthesis on the square texture blocks it constructs.

[0018] The main flow chart of the present invention is as figure 1 As shown, the specific steps are as follows:

[0019] The main flow chart of the present invention is as figure 1 As shown, the specific steps are as follows:

[0020] (1) Realize texture compression with principal component analysis method

[0021] The first step is to select the line of sight direction j, and construct a matrix T for the ...

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Abstract

A method for compressing and synthesizing a bidirectional texture function realizes compression and synthesis of the bidirectional texture function data by principal component analysis and color rectangular texture blocks. The method comprises the following steps; firstly the bidirectional texture function data are grouped according to different viewpoints and compressed by the principal component analysis algorithm; and then data blocks are immediately extracted from the compressed bidirectional texture function data by an error calculation method, one color rectangular texture block is formed by every four data blocks, and multi-dimension texture synthesis is carried out by the color rectangular texture blocks; and at last, the compressed and synthesized bidirectional texture function data are drawn on a 3D model surface. The method can compress large-scale bidirectional texture function data and synthesize new multi-dimension texture images according to the existing texture images. The method has the advantages of fast synthesis and precious effect, solves the consistency problem of the multi-dimension texture synthesis, expands means of the multi-dimension texture sources, and meets the realistic drawing requirements in a virtual environment.

Description

technical field [0001] The invention discloses a method for compressing and synthesizing texture functions, in particular a method for compressing and synthesizing bidirectional texture functions, which is mainly used for the construction and rendering of realistic virtual environments, and belongs to the technical field of computer virtual reality. Background technique [0002] The reflective properties of object surfaces have always been a research hotspot in computer graphics and computer vision. The reflective properties of objects focus primarily on how light interacts with the object's surface. The interaction between light and an object is determined by the position, direction, and wavelength of the incident light, the transmission time of the light inside the object, and the position, direction, and wavelength of the outgoing light. Therefore, it can be described by a 12-dimensional function. In practical applications, it is unrealistic to obtain such a high-dimens...

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Application Information

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IPC IPC(8): G06T9/00G06T15/00
Inventor 齐越张展胡勇沈旭昆
Owner BEIHANG UNIV
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