matlab开发工具箱中的支持向量机，车牌识别定位程序的部分功能，matlab程序运行时导入数据文件作为输入参数，pwm整流器的建模仿真，结合PCA的尺度不变特征变换(SIFT)算法，包含特征值与特征向量的提取、训练样本以及最后的识别。- matlab development toolbox support vector machine, Part of the license plate recognition locator feature, Import data files as input parameters matlab program is running, Modeling and simulation pwm rectifier Combined with PCA scale invariant feature transform (SIFT) algorithm, Contains the eigenvalue and eigenvector extraction, the training sample, and the final recognition.