Novel fragile watermarking based on image singular value
基于图像奇异值的脆弱水印方案

A novel fragile watermarking based on image singular value was proposed to overcome the security problems of fragile watermarking with precise localization. The embedded watermark was obtained by converting the singular values of image matrix into a binary sequence. To improve watermark security, a chaotic system was applied to encrypt the watermark sequence. The tampered area of the watermarked image could be reflected in the watermarking difference map and the tampered intensity could be reflected in singular values difference. Simulation results show that the proposed method may not only improve the security of fragile watermarking with precise localization, but also point out the intensity of tampered areas.