说明：  利用matlab的gui设计的带有输入和输出功能的界面图形，实现等距线可视性很强，自己独立编写的数据和图形，学习非常值得,实现BP压缩图像，c语言
(Uses the Matlab GUI design with the input and output function interface graphics, realizes the isometric line visibility is very strong, independently compiles the data and graphics, the study is very worthwhile, realizes the BP compression image, the C language.)