【摘要】 提出了一种特别适用于数字产品的认证、内容篡改证明和完整性证明的脆弱数字水印算法 .原始图像的象素灰度值映射为混沌的初值 ,经过若干次迭代生成水印图像 ,然后把它嵌入象素灰度值的LSB(LeastSignificantBit)平面 .利用混沌对初值极端敏感性的特点 ,能够精确地定位对加入水印图像的篡改 ,并且水印提取不需要原始图像 .实验结果表明了所提出水印方案对篡改证明的有效性 ,敏感性以及良好的篡改定位能力 .更多还原

【Abstract】 A new fragile watermarking scheme is presented,which is capable of authentication,tamper-proofing and integrity verification of digital products.Let the grayscale values of host image map the initial values of the chaotic mapping.The watermark obtained by iterating several times of the chaotic mapping,is embedded into the LSB (Least Significant Bit) plane of host image.The proposed scheme can localize the tampers on the watermarked image by using to the high sensitivity on initial value of the chaotic mapping.Moreover,no host image is needed in watermark extraction.Our simulation results show the effectiveness,sensitivity and localization of tamper-proofing of this technique.更多还原