Cepstrum digital image watermarking algorithm

A novel digital image watermarking technique in the cepstrum domain is proposed. The watermark is weighted in the cepstrum domain according to the distribution of cepstral coefficients and the characteristics of human visual system. The watermark is imperceptibly inserted in a spread-spectrum-like fashion into the cepstral components of the original image and the embedded watermark can be uniquely detected without the original image. Computer simulation results show that the proposed method is robust to multiple watermarks, JPEG compression, image cropping, multiplicative noise, and some other image processing operations.