Destroy the Robust Commercial Watermark via Deep Convolutional Encoder-Decoder Network

Table 3

Performance comparison in terms of removal effect and image quality for test images.

Test images
		Strength of watermark	PSNR	SSIM	Strength of watermark	PSNR	SSIM	Strength of watermark	PSNR	SSIM
Proposed method		None	39.48	0.974 4	None	36.76	0.915 4	None	36.35	0.941 3
JPEG	= 30	None	24.28	0.786 6	Very weak	23.04	0.762 7	Very weak	22.96	0.780 5
	= 50	Very weak	24.76	0.824 8	Weak	24.45	0.800 2	Weak	23.61	0.827 5
	= 70	Weak	25.18	0.860 4	Weak	24.76	0.838 7	Weak	24.13	0.862 6
Gaussian noise	= 2	Medium	26.61	0.670 3	Medium	26.50	0.541 7	Medium	26.48	0.777 1
	= 4	Weak	20.94	0.430 8	Weak	20.61	0.286 7	Weak	20.51	0.535 1
	= 8	Very weak	14.83	0.217 1	Very weak	14.49	0.129 3	Weak	14.55	0.276 8
Median filter	= 2	Strong	22.77	0.779 9	Medium	23.55	0.876 0	Medium	21.40	0.779 7
	= 5	Strong	22.59	0.668 7	Medium	23.58	0.819 0	Medium	20.53	0.548 3
	= 7	Medium	22.10	0.594 4	Medium	23.42	0.779 4	Medium	19.92	0.422 5