Figure 12
From: A New Robust Watermarking Scheme to Increase Image Security
(a)–(d) Watermarked images after embedding 128 × 128 watermark image as shown in Figure 11(b). (e)–(h) Extracted watermarks from (a)–(d), respectively. (i)–(l) Watermarked images after embedding 128 × 128 watermark image as shown in Figure 11(d). (m)–(p) Extracted watermarks from (i)–(l), respectively. (a)PSNR: 52.33 dB (b)PSNR: 52.44 dB (c)PSNR: 51.72 dB (d)PSNR: 51.38 dB (e)γ = 0.9974 (f)γ = 0.9973 (g)γ = 0.9979 (h)γ = 0.9974 (i)PSNR: 52.92 dB (j)PSNR: 53.08 dB (k)PSNR: 52.27 dB (l)PSNR: 52.04 dB (m)γ = 0.9975 (n)γ = 0.9970 (o)γ = 0.9982 (p)γ = 0.9971