说明：  本程序用matlab编写。实现图像的构造编码。压缩包中的PPT介绍构造编码。一个编码程序，一个解码程序。本程序是无损压缩，编码后可压缩掉30 以上。附有图片。程序有必要的注释。
(This program written by matlab. The structure of image coding. PPT introduced compressed package structure encoding. A coding process, a decoding program. This procedure is lossless compression, encoding more than 30 after the compressible out. With pictures. Program has the necessary comments.)