Enhancing Feature Point-Based Video Watermarking against Geometric Attacks with Template

Figure 5

The original frame and its corresponding geometric attacked frames.

(a) The original frame

(b) Padding (30%)

(c) Cropping (50%)

(d) Scaling (0.5)

(e) Shielding (49%)

(f) Scaling (0.8)+cropping (5%)

(g) Scaling (0.5)+padding (20%)

(h) Scaling (0.5)+shielding (10%)