A New Robust Watermarking Scheme for Color Image in Spatial Domain

This paper presents a new robust watermarking scheme for color image based on a block probability inspatial domain. A binary watermark image is permutated using sequence numbers generated by a secret key and Gray code, and then embedded four times in different positions by a secret key. Each bit of the binary encoded watermark is embedded by modifying the intensities of anon-overlapping block of 8*8 of the blue component ofthe host image. The extraction of the watermark is bycomparing the intensities of a block of 8*8 of the watermarked and the original images and calculating the probability of detecting ´0´ or ´1´. Tested by benchmark Stirmark 4.0, the experimental results show that the proposed scheme is robust and secure against a widerange of image processing operations.