基于多种易用标记的图像着色  

Colorization based on multiple user-friendly input labels

作　　者：张可为[1,2] 陈秋凤[2] 申群太[2] 

机构地区：[1]湖南工程学院电气信息学院,湖南湘潭411101 [2]中南大学信息科学与工程学院,湖南长沙410008

出　　处：《光电子．激光》2014年第2期386-392,共7页Journal of Optoelectronics·Laser

摘　　要：在现有的基于颜色标记的着色算法中,用户提供的颜色标记仅用于在图像局部区域指定颜色。由于功能方式单一,难以全面地反映用户的意图,导致着色结果容易出现失真。本文提出一种利用多种颜色标记方式提高着色质量的方法。首先定量讨论其着色结果与用户输入的颜色标记之间的关系,并对失真的主要成因进行数学分析;进而提出一种新算法综合处理传统方式的阳性颜色以及新增的非局域性和阴性颜色3种标记方式,其中非局域性标记用于实现信息的远距离传播,为实现零碎区域着色提供有效手段,而阴性颜色标记与传统标记互补,通过在图像局部区域取消某种颜色,便于更最直观、灵活地修改着色结果。实验表明,引入这些标记不仅操作简单,而且有助于计算机准确理解用户意愿,便于用户直观明确地控制着色效果。In existing label-based colorization method,labels are employed to only specify chrominance of pixels in several are as during colorization.Since this single kind of user label cannot pro vide enough user′s intention for colorization,the exiting method suffers from falsehood in r esult.To solve this problem,a colorization method which can deal with multiple intuitive labels is proposed in this paper.Firstly,the mathematical analysis on mechanism of optimization colorization algorithms is performed,whic h helps not only to extract relation between output colorization result and user′s input labels,but also to identify the very reason for poor quality result,and encourages a colorization frame to synthesize two additional kinds o f intuitive labels with the existing one. Among them,the non-local one makes it available to take distant propagation,whi ch is beneficial to high-quality colorization on scattered area,and another one named negative label,in contrast to traditional label,reduces the influence of specific label in indicated area,a nd extends flexibility in improvement for poor result.Experiment results s how that the proposed algorithm with intuitive labels can not only provide intelligent ways to understand user i ntention,but also make it easier to control visual effects directly and effectively.

关 键 词：着色 数学分析 多种标记 易用 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]