matlab程序 图像哈希实现 用于图像认证领域-image hashing is used in authentication

基于DCT压缩前后不变量，编写的抗JPEG压缩的数字图像认证水印算法，具有良好的抵抗压缩、剪切、篡改等性能的水印仿真程序-Around the DCT-based compression is not variable, the preparation of the anti-JPEG compression algorithm for digital image authentication watermark with good resistance to compression, shea

该程序是基于内容认证的半脆弱图像水印，是脆弱水印中的一种。-The program is certified content-based semi-fragile image watermarking is a fragile watermark.