基于JPEG2000的半脆弱数字水印技术  

A Semi-fragile digital watermarking resisting to JPEG2000

作　　者：王沛[1] 蒋慧钧[2] 姚恒[1] 李莉[1] 

机构地区：[1]上海师范大学数理信息学院,上海200234 [2]上海文广新闻传媒集团节目资料中心,上海200051

出　　处：《上海师范大学学报（自然科学版）》2008年第1期52-57,共6页Journal of Shanghai Normal University(Natural Sciences)

摘　　要：提出了一种抵抗JPEG2000图像压缩标准的半脆弱水印,适合数字图像产品的内容篡改认证和完整性证明.该算法先对图像进行预量化与预截断抵抗JPEG20000的压缩攻击,根据原始图像像素的邻域特性形成水印,再使用量化嵌入算法,嵌入水印.提取时不需要原始图像甚至不需要原始水印的对比.实验效果表明,该算法对抵抗JPEG2000压缩有鲁棒性,对恶意攻击有脆弱性,篡改定位准确.In this paper, a kind of semi-fragile image watermarking is provided, which can resist to JPEG2000 compression. This algorithm uses pre-quantizing and pre-truneating to stand against JPEG2000 compression. The watermark is directly extracted from the charaetem of adjacent pixels in original image and embedded with the method of quantization inserting. It reaches blindly extraction, without original image, even without original watermark. Experiment results show that this algorithm is robust to JPEG2000 compression and fragile to vicious attack, also available for tampered positioning.

关 键 词：半脆弱数字水印 JPEG2000 量化嵌入 内容认证 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]