使用matlab实现界面化编程，在matlab中输入guide开始。代码实现的功能是，打开一副图片，选取其中的某一部分，然后再一侧显示。并可以保存选取部分到一副新的图片，或者导出所选图片的矩阵，将矩阵内容输出到txt中。-Use matlab realize interface programming, input guide began in matlab. Code function is to open a picture,　a part of it, and then the side of the display. And can be saved to a selected portion of the new image, or export the selected image matrix, the matrix output to txt in.