Combining Digital Watermarking and Fingerprinting Techniques to Identify Copyrights for Color Images

Figure 15

The average AR values of test images: (a) JPEG quality, (b) contrast, (c) Gauss blurring, (d) scaling, (e) brightness, and (f) cropping.

(a)

(b)

(c)

(d)

(e)

(f)