A Novel Comprehensive Watermarking Scheme for Color Images
Algorithm 8
Extracting robust watermark .
(1) Step 1: transform the G layer of the attacked image with the same transformation as the embedding procedure of watermark . For more information, refer to steps 1–4 in Algorithm 2.
(2)
Step 2: get the singular value matrix through the steps above, set , and then use the following equation for watermark extraction [19]: .