数字水印嵌入程序\ABCD.bmp ................\bin.m ................\dec.m ................\embed.m ................\extract.m ................\image_embed.bmp ................\lena512.bmp ................\watermark_exact.bmp ................\一种基于LSB的数字图像信息隐藏算法.pdf 数字水印嵌入程序