Robust and Fragile Medical Image Watermarking: A Joint Venture of Coding and Chaos Theories

Figure 13

(a) Original host ultrasound image (b, d, e, f), watermark logos (c, g, h, i), and watermarked images. (a) Original ultrasound image. (b) Watermark logo (30 × 30). (c) Watermarked image with logo “A,” PSNR = 42.4 dB. (d) Watermark logo (40 × 40). (e) Watermark logo (50 × 50). (f) Watermark logo (60 × 60). (g) Watermarked image with logo “C,” PSNR = 38.6 dB. (h) Watermarked image with logo “H” PSNR = 32.8 dB. (i) Watermarked image with logo “M,” PSNR = 30.2 dB.

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