Improved Knockout Natural Image Matting Algorithm
Feng Bing-chun · Jisuanji gongcheng · 2009
Aiming at the problem which is appeared in Knockout algorithm that the color estimate model is only applied to smooth image,a new color estimate model is proposed.The unknown region is divided into many subregions by region growth algorithm,rectangular block is made out based on the point which is nearest to the subregion in the foreground and background contour line.The weighted average values of foreground and background pixels color in rectangular block are computed respectively.The values are taken as the foreground and background color components.The improved color estimate model has better behavior in the natural image matting for the image which the edge color is very different.