A multifunctional watermarking algorithm for color image
Zhiyong Xiong · 2004
A multifunctional watermarking algorithm for color image is presented based on the rapport of wavelet coefficients and the choice swatch method; so robust watermark and fragile watermark exist in an image. The watermark is a binary image based on chaotic sequences, and using key to determine the position of watermark in the image, which can assure very good security for the watermark. The watermark is extracted without the original unmarked image. The experiments show that the algorithm can assure good imperceptibility for watermarked image and the watermark embedded using the algorithm has good robustness and fragility.