软件功能是实现在JPG中截取固定大小的图像并保存为JPG文件，可用于照片采集等应用,Software functions is to achieve in the JPG in the interception of fixed-size images and save it as a JPG file that can be used for applications such as photo collection

图片格式由jpg转换成ppm, K. MIKOLAJCZYK University of Oxford, OX1 3PJ, Oxford, United Kingdom-Jpg image format conversion to ppm, K. MIKOLAJCZYK University of Oxford, OX1 3PJ, Oxford, United Kingdom

matlab，把文件解压后放入matlab的默认文件夹里，一般是（C:\MATLAB7\work）。在matlab主窗口中输入命令ima=imread( C:\MATLAB7\work\1.jpg )，然后输入命令[P,U,iter]=GPAS2(ima,2)，即可。绝对好运行-matlab, matlab to unzip the files into the default folder, usually (C: \ MATLAB7 \ work). In the matlab main w