基于GPU的通用计算，利用显存的cache是提高算法效率的重要方面，该例子是在CUDA环境下如何读取纹理的程序。-based GPU generic terms, the use of video memory cache is to improve the efficiency of the algorithm, The example is the CUDA environment how to read texture procedures.

The indexing of an image database is often referred as feature extraction. Mathematically, a feature is an n-dimensional vector, with its components computed by some image analysis. The most commonly used visual cues are color, texture, shape, sp