本文件为修改后的LIBGPEG库，使用LIBJPEG库对图像在内存中进行压缩和解压缩处理，而非原版需保存在文件中进行操作，内附有操作实例，可方便快捷的进行图像压缩与解压缩操作。-This document is revised LIBGPEG library, use the library LIBJPEG the image compression and decompression in memory compression process, rather than the original should be kept in a file operation, enclosing an operation instance, it can be convenient for image compression and decompression operating.