Fast Colorization Using Edge and Gradient Constrains

Li,Y., Lizhuang,M., Di,W.

Abstract:
This paper proposes a fast but effective user-guided colorization algorithm. We make full use of the information given by the gray-scale images, including the edge, gradient and gradient direction, to propagate color over regions. Our algorithm not only reduces the color confusion between two regions obviously, but also speeds up the colorization process, comparing the state-of-art colorization methods. Our algorithm can also be extended to recolorization and movie colorization. The experiment results demonstrate our algorithm can obtain high quality colorizations of still and movie clips from small amount of user scribbles within several seconds.