A Chaotic Fragile Watermarking Technique with Precise Localization
Hongxia Wang · Dianzi xuebao · 2004
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.