Research Article
Image Watermark Based on Extended Shearlet and Insertion Using the Largest Information Entropy on Horizontal Cone
Table 7
Comparison on “Lena” image (NC/PSNR).
| | DCT | DWT | DST |
| No attack | 0.9849/34.7284 dB | 0.9849/33.7641 dB | 0.9849/53.1768 dB | Scaling (25%) | 0.7699/27.8846 dB | 0.7686/28.0819 dB | 0.7778/29.9888 dB | Scaling (50%) | 0.9243/31.6796 dB | 0.9261/31.6349 dB | 0.9302/34.6526 dB | Scaling (4) | 0.9809/34.7284 dB | 0.9749/33.8214 dB | 0.9819/45.9472 dB | JPEG (10) | 0.8428/29.2431 dB | 0.9824/29.0396 dB | 0.7056/30.6196 dB | JPEG (30) | 0.9429/31.9655 dB | 0.9844/31.5159 dB | 0.8252/35.1718 dB | JPEG (50) | 0.9819/32.5494 dB | 0.9849/32.0032 dB | 0.9004/36.4005 dB | Cropping right (50%) | 0.7222/9.6540 dB | 0.9790/9.6459 dB | 0.9712/9.6617 dB | Cropping right (75%) | 0.7280/7.0743 dB | 0.8530/7.0719 dB | 0.8579/7.0764 dB | Cropping middle (50%) | 0.7100/11.6153 dB | 0.8750/27.3320 dB | 0.8901/11.6305 dB | Salt & Pepper noise (0.1) | 0.6934/15.4339 dB | 0.6331/15.3887 dB | 0.6729/15.4918 dB |
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