Robust Watermarking Algorithm against the Geometric Attacks based on Non-Subsampled Shearlet Transform and Harris-Laplace Detector

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">Cover image</td><td class="align_center">Cameraman</td><td class="align_center">Peppers</td><td class="align_center">Couple</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">Quarter cutting</td><td class="align_center">0.9905</td><td class="align_center">0.9834</td><td class="align_center">0.9890</td></tr><tr><td class="align_left">Half cutting</td><td class="align_center">0.9650</td><td class="align_center">0.9890</td><td class="align_center">0.9780</td></tr><tr><td class="align_left">Irregular cutting</td><td class="align_center">0.9871</td><td class="align_center">0.9887</td><td class="align_center">0.9903</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>NC values of the watermarked images under cutting attack.</div>

Security and Communication Networks

tab4

Table 4

Table 4: Robust Watermarking Algorithm against the Geometric Attacks based on Non-Subsampled Shearlet Transform and Harris-Laplace Detector 