一种用于图象认证的脆弱水印算法设计

A Watermarking Method Designation Used For Image Authentication

脆弱水印是一种很容易被修改或破坏的标识,根据其易被破坏的特性,脆弱水印非常适合用于图像内容的认证。本文提出一种算法,在图像的离散小波域中加入数字水印,它既可以在空域也可以在频域检测图像的变化。这种方法可以防止多种篡改方式,如数据替换、滤波及有失真压缩等。此外通过对所选定的图像小波变换系数量化后嵌入水印,提高了防篡改检测的敏感性。

Fragile Watermarking is a mark which can be easily changed or destructed, Just because of the character of easy change, it quite suits the image authentication, A new watermarking method was presented in the paper, which can not only be used for the airspace but also for the frequency domain to detect the change of the image, The method can prevent many kinds of tamper, such as data replacing, filtering and distorted compressing.