Erasable watermark algorithm for color images based on correlation of color components
Jiang Tian-fa · Jisuanji yingyong yanjiu · 2009
After studying correlation of color components,presented a new erasable watermark algorithm for color images.The algorithm splited the original image to some blocks,using correlation of color compontents,embedded two bits watermark into every block,the watermark was a binary sequence based on significative watermark image which was modulated by chaotic sequences,used key and average of green compontents to determine the position of watermark in the image block,which could assure very good security for the watermark.The watermark was extracted and erased without the original unmarked image.The experiments show that the algorithm can assure good imperceptibility for watermarked image and the watermark beseem to exact authentication for image,this watermark can be successfully erased.