Image Watermark Based on Extended Shearlet and Insertion Using the Largest Information Entropy on Horizontal Cone

Table 1

The experimental results of invisibility.

	Lena	Boat	Barbara
The test images
The watermarked images
PSNR/MSE	53.1768/0.3129	53.5148/0.2895	53.6411/0.2812
The absolute difference between original images and their corresponding watermarked image
The extracted watermark
NC	0.9849	0.9848	0.9850