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Figure 27 | EURASIP Journal on Advances in Signal Processing

Figure 27

From: A New Robust Watermarking Scheme to Increase Image Security

Figure 27

(a)–(d) The watermarked Lena, Baboon, Peppers and Crowd images after tampering, respectively. (e)–(h) The extracted watermarks from (a)–(d), respectively. (i)–(l) The watermarked Lena, Baboon, Peppers and Crowd images after data blocks removal, respectively. (m)–(p) The extracted watermarks from (i)–(l), respectively. (a)PSNR = 15.35 dB (b)PSNR = 19.59 dB (c)PSNR = 16.37 dB (d)PSNR = 18.46 dB (e)γ = 0.7167 (f)γ = 0.9090 (g)γ = 0.7598 (h)γ = 0.8415 (i)PSNR = 15.33 dB (j)PSNR = 14.49 dB (k)PSNR = 15.87 dB (l)PSNR = 14.63 dB (m)γ = 0.7698 (n)γ = 0.7702 (o)γ = 0.7816 (p)γ = 0.6724

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