Reversible and Fragile Watermarking for Medical Images

Figure 3

(a) Original MRI image; (b) chaotic watermark; (c) watermarked image. (d) Recovered image with exact initial conditions. (e) Recovered image with x(0) = 0.25000001, r = 3.58, and x(0) = 0.56, r = 3.57.

(a)

(b)

(c)

(d)

(e)