Fast Image and Video Colorization using Chrominance Blending Liron Yatziv and Guillermo Sapiro. Image Processing, IEEE Transactions on , vol.15, no.5, pp. 1120- 1129, May 2006. Patent# 20060245645

Abstract

Colorization, the task of coloring a gray-scale image or video, involves assigning from the single dimension of intensity or luminance a quantity that varies in three dimensions, such as red, green, and blue channels. Mapping between intensity and color is therefore not unique, and colorization is ambiguous in nature and requires some amount of human interaction or external information. A computationally simple yet effective approach of colorization is presented in this paper. The method is fast so it can be conveniently used "on the fly," permitting the user to interactively get the desired results promptly after providing a reduced set of chrominance scribbles. Based on concepts of luminance-weighted chrominance blending and fast intrinsic distance computations, high quality colorization results for still images and video are obtained at a fraction of the complexity and computational cost of previously reported techniques. Possible extensions of the algorithm here introduced included the capability of changing colors of an existing color image or video as well as changing the underlying luminance.

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