Research Article

A Strong Robust Zero-Watermarking Scheme Based on Shearlets’ High Ability for Capturing Directional Features

Table 8

The values of distorted host images and values of extracted watermarks after rotating.

Host image
SSIM/NCSSIM/NCSSIM/NCSSIM/NCSSIM/NC

Boat0.87/0.97760.83/0.97760.81/0.97160.79/0.97630.75/0.9706
Goldhill0.83/0.96430.80/0.96290.77/0.96160.75/0.96770.71/0.9669
Baboon0.66/0.93890.64/0.93270.62/0.93270.61/0.93430.58/0/9334
Barbara0.75/0.96080.72/0.96220.69/0.96620.67/0.96730.63/0.9673
Peppers0.85/0.98090.82/0.97760.79/0.97620.77/0.98850.73/0.9849
Man0.83/0.94660.81/0.94660.78/0.94180.76/0.95490.72/0.9590