Cryptanalysis and Improvement of the Robust and Blind Watermarking Scheme for Dual Color Image

Figure 3

Attack of the improved scheme. (a) The original watermarked image and (b) original watermark; (c) the attacker’s watermarked image and (d) the watermark in (c); (e) the attacked image of (a); (f) the extracted watermark from (e).

(a) PSNR: 46.2967

(b)

(c) PSNR: 46.5384

(d)

(e) PSNR: 42.7352

(f)