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Interactive colorization based on hybrid distance transform

Interactive colorization based on hybrid distance transform,10.1109/CSAE.2011.5952736,Przemyslaw Lagodzinski,Bogdan Smolka

Interactive colorization based on hybrid distance transform  
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Colorization is a computerized process for adding color to black and white pictures, movies or TV programs. Since changes in color are more easily perceived than changes of intensity, therefore this procedure makes the interpretation and understanding of images easier. During colorization process a scalar value representing pixel's intensity is being replaced by a vector in a given color space. Since the mapping between intensity and color has no inherently correct solution, human interaction and external information usually plays a large role. In this paper we present a novel colorization method based on an hybrid morphological distance transformation which considers the image structures to automatically propagate the color inserted into the image by a user. The effectiveness of the algorithm allows to work interactively and to obtain desired results in real time. I. INTRODUCTION With the rapid development of computer technology, adding color to gray scale images and movies in a way that looks natural to human observers has recently attracted renewed interest within the computer vision community. In the last few years, several advanced and effective techniques for images and video have been proposed. These techniques are based on: luminance keying and color transfer (1), image analogies (2), motion estimation (3), segmentation (4), color prediction (5), probabilistic relaxation (6) and chrominance blending (7), among many other techniques. In this paper we show that using our novel colorization method based on the modified distance transformation, it is possible to obtain satisfactory colorization results in very short time and with small amount of work. II. THE PROPOSED ALGORITHM
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