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