本文描述了图像识别系统的结构与工作原理，在对图像预处理，特征提取，分类，图像匹配算法进行深入研究和分析的基础上，分析和比较各种算法的优缺点。-This paper describes an image recognition system structure and working principle, in the image preprocessing, feature extraction, classification, image matching algorithm in-depth research and analysis, based on the analysis and comparison of the advantages and disadvantages of various algorithms.