A Novel Improved Reversible Visible Image Watermarking Algorithm Based on Grad-CAM and JND

Table 4

PSNR and SSIM values of reversible watermarked images with watermark horse and  = 0.6 and  = 0.5

Cover image	Proportion	PSNR				SSIM
	r	Hu and Jeon [5]	Chen et al. [7]	Mohammad et al. [8]	Proposed	Hu and Jeon [5]	Chen et al. [7]	Mohammad et al. [8]	Proposed
Wood rabbit	2	18.5095	24.3761	21.9190	25.3271	0.8342	0.8869	0.8880	0.9480
	3	21.8731	26.7856	24.9474	30.4880	0.9252	0.9410	0.9241	0.9811
	4	24.4574	29.2036	26.8982	34.3454	0.9587	0.9666	0.9376	0.9911
Tabby	2	19.1799	23.9406	21.5767	23.9950	0.8321	0.8702	0.8787	0.9402
	3	22.5918	27.5535	24.6448	27.8448	0.9224	0.9384	0.9112	0.9731
	4	24.9722	30.0688	26.8721	30.8524	0.9550	0.9649	0.9254	0.9849
Partridge	2	19.4780	25.3601	22.8416	24.2441	0.8437	0.8992	0.9111	0.9434
	3	22.6364	27.4272	26.0996	28.4293	0.9310	0.9440	0.9453	0.9763
	4	24.9065	29.1831	28.4580	31.6801	0.9610	0.9639	0.9574	0.9872