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Single level MIP filtering algorithm for anisotropic texturing

A non-homogeneous and mapping technology, applied in 3D image processing, image generation, image data processing, etc., can solve the problem of reducing the performance of non-homogeneous filtering processing

Active Publication Date: 2007-05-16
VIA TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In an efficient cache design that completes one layer of filtering in one cycle, the extra memory cycle for the second layer of processing reduces the performance of the heterogeneous filtering process by half

Method used

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  • Single level MIP filtering algorithm for anisotropic texturing
  • Single level MIP filtering algorithm for anisotropic texturing
  • Single level MIP filtering algorithm for anisotropic texturing

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Embodiment Construction

[0064] The specific methods, steps, features and effects of the single-layer reduction filtering theory applicable to heterogeneous textures according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.

[0065] Figure 1 illustrates a conventional texture map described in US Patent No. 6,304,268 (Iourcha), assigned to S3 Graphics, Inc. Therefore, this patent will be incorporated by reference in the specification of the present invention. Wherein, level n1 has two samples A1 and A2, and level n2 has two samples B1 and B2. A1 and B1 are mixed together to produce C1, and A2 and B2 are also mixed together to produce C2. Next, C1 and C2 are added in weights to produce the final color.

[0066] FIG. 2 illustrates a texture map according to the present invention. In Figure 2, all eight samples in one layer are added in a weighted fashion to produce the final color, and two layers of downscaled maps are n...

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Abstract

The invention concerns a single level mip filtering algorithm for anisotropic texturing. A method of performing anisotropic texture mip-mapping. The method includes determining a region of support for a set of target pixels of the image to be textured, and mapping the region of support to an area in texture map that is generally elliptical. For each axis of the ellipse the number of samples is determined and a filter function is performed on those samples to find the final color value. For four texels, the filter function is a weighted sum of the color values of each texel, where the weights are determined based on the fraction of the Level of Detail (LOD) and the fraction of the U or V coordinate.

Description

technical field [0001] The invention relates to a single-level reduction filtering theory (SINGLE LEVELMIP FILTERING ALGORITHM FOR ANISOTROPIC TEXTURING) suitable for heterogeneous textures. The present invention relates to texture mapping, and more particularly to a non-uniform texture mapping method designed to reduce aliasing effects. Background technique [0002] The ability to access pixel buffers in graphics systems opens the door to new ways of processing graphics images. For example, accessing pixel buffers in the graphics system allows these effects to be performed directly on pixels instead of performing these effects in the graphics system's geometry engines, such as texturing a surface. surface) specific effects. In the forward direction, texture mapping a surface generally involves mapping a given point in a two-dimensional (2D) texture space to a given point in object space. Three-dimensional (3D) surfaces. This step is called parameterization. Next, in a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T15/20
CPCG06T15/04G06T2210/36
Inventor 廖群峰洪洲
Owner VIA TECH INC