A Novel Comprehensive Watermarking Scheme for Color Images

<table class="algorithm-group"><tr><td><table class="algorithm" id="alg4"><tr><td colspan="2">(1)  Step 1: use SIFT for feature point extraction [<a href="/journals/scn/2020/8840779/#B15">15</a>].</td></tr><tr><td>(2)</td><td>Step 2: use the quadtree to decompose the watermark image, leaving only one feature point in each block, and the points are recorded as a rotary recovery key.</td></tr></table></td></tr></table>

Security and Communication Networks

alg4

Algorithm 4

Algorithm 4: A Novel Comprehensive Watermarking Scheme for Color Images 