Figure 25
From: A New Robust Watermarking Scheme to Increase Image Security
(a)–(d) the watermarked Lena, Baboon, Peppers and Crowd images after cropping, respectively. (e)–(h) the extracted watermarks from (a)–(d), respectively. (a)PSNR = 18.01 dB (b)PSNR = 21.01 dB (c)PSNR = 16.56 dB (d)PSNR = 14.63 dB (e)γ = 0.4506 (f)γ = 0.4206 (g)γ = 0.5325 (h)γ = 0.7223