文件扩展表批量转换程序。 使用方法可在命令行窗口输入ExtConvert /? 可解！-file extensions Table batch conversion process. Use the command line window ExtConvert / solvable!

该代码可以对批量人脸图像进行人脸检测，转换成灰度图并归一化到统一大小。-It can process large numbers of images.face detection , translate to gray image

将UTF8编码转为GB，优点是命令行程序，方便其它程序调用，方便用批处理将大批量文件一次性转换-The UTF8 encoded into GB, the advantage is a command line program, easy to invoke other programs, easy to use batch files to large quantities of one-time conversion