保色调的黑白卡通图像着色方法  

Tone-Preserving Colorization of Black-and-White Cartoon Image

作　　者：朱薇[1,2] 刘利刚[1,2] 

机构地区：[1]浙江大学数学系计算机图象图形研究所,杭州310027 [2]浙江大学CAD&CG国家重点实验室,杭州310027

出　　处：《计算机辅助设计与图形学学报》2011年第3期392-398,共7页Journal of Computer-Aided Design & Computer Graphics

基　　金：国家自然科学基金委员会与微软亚洲研究院联合资助(60776799);国家"九七三"重点基础研究发展计划项目(2009CB320801)

摘　　要：图像彩色化是给黑白图像或者视频上色,对黑白卡通图像上色能够大幅度地提高卡通图像的表现力.卡通图像的色调是人们感知的第一印象,为此提出一种保色调的黑白卡通图像着色方法.首先使用保持边界的图像分解技术得到卡通图像的色调,可很好地解决卡通图像灰度不连续的问题;然后使用Gabor特征向量计算出一个模式能量来防止边界处的泄露;最后将图像色调能量和模式能量加入最优化着色方法,得到较好的着色结果.该方法利用少量的人工标色自动上色,不需要分割就能够得到卡通图像保色调着色效果.大量的实验结果表明,文中方法对各种卡通图像都能够取得更好的着色效果.Image colorization is the process of adding color to a monochrome image or movie, which is an active hut challenging research topic. Based on the observation that the tone map of an image gives the important visual appearance of the image, this paper proposes a novel approach for colorizing black- and-white cartoon images by preserving their tone properties. First, an edge preserving image decomposition method constructs a tone map which solves intensity discontinuity in a cartoon image. Also, a Gabor feature vector builds a pattern map in order to prevent boundary discontinuity. Finally, both the tone map and the pattern map are contributed to an optimization algorithm, obtaining a better color appearance for the cartoon image. Our method generates satisfactory colorization results given only a few user-specified color strokes without segmentation. Many experimental results have shown that our method obtains high quality colorization results for kinds of cartoon images including hatching cartoons, hal{tone cartoons, and caricature cartoons.

关 键 词：图像彩色化 图像分解 卡通图像色调 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]