123RF: Estimated Watermark

 

Estimated watermark image and alpha matte (final result)

c*alpha W
c*alpha*W (matted watermark, embedded on a gray background for visualization)

 

Initial matted watermark estimation (Section 3.1), normalized per color channel for visualization

 

Shift-corrected initial matted watermark (Section 3.1)

Estimated blend factor, c = (0.18 0.20 0.23)

 

Estimated foreground/background masks (Section 3.2)

Foreground mask Background mask
 

Initial alpha matte, alpha_n (Section 3.1)