Reversible Watermarking Using Prediction-Error Expansion and Extreme Learning Machine

Figure 9

The total process of images. Column (a) lists original images. Column (b) lists watermarked images. Column (c) lists the difference between the original and watermarked images (difference of (a) and (b)). Column (d) lists the restored images. Column (e) lists the difference between the original and restored images (SSIM = 1, difference of (a) and (d)).

(a)

(b)

(c)

(d)

(e)