基于色彩距离最小化和最大色彩差的文本定位  

Text localization based on color distance minimization and maximum color difference

作　　者：刘美华[1] 屈喜龙[2] 周细凤[3] 梁开健 

机构地区：[1]湖南工程学院,工程训练中心,湖南湘潭411101 [2]湖南工程学院计算机与通信学院,湖南湘潭411101 [3]湖南工程学院电气信息学院,湖南湘潭411101 [4]应用技术学院,湖南湘潭411101

出　　处：《光电子．激光》2015年第10期2008-2015,共8页Journal of Optoelectronics·Laser

基　　金：湖南省教育厅科研(15C0330);湖南省科技计划(2014FJ3054)资助项目

摘　　要：提出了一种基于色彩距离最小化和最大色彩差(MCD)的场景文本定位方法。首先,使用多次K均值聚类和色彩距离最小化的方法,从不同复杂程度的场景图像中提取文本连通区域;考虑到色彩聚类方法容易受光照影响,使用基于MCD最大色彩差的方法,提取文本连通区域作为补充,由于将色彩与梯度信息相结合,在一定程度上能克服光照的影响;将得到的连通区域通过设定的字符合并规则,构建文本行;候选文本行中通常包含错误检测的非文本行,为了提高文本检测的正确率,最后采用基于特征提取和机器学习的方法,验证候选文本行,得到文本定位结果。将本文方法在ICDAR2011和ICDAR2013公共数据库上实验,对于ICDAR2011数据集,本文获得的召回率、准确率和F指标分别为0.66、0.77和0.71;对于ICDAR2013数据集,本文获得的召回率、准确率和F指标分别为0.65、0.77和0.70。将本文方法与其它文本检测算法比较,结果表明本文方法的可行性、有效性。This paper proposes a scene text detection method based on color distance minimization and maximum color difference （MCD）. Firstly,multiple of K-means clustering and color distance minimiza- tion are performed, which can extract text connected components from images with different complexi- ties. Considering color clustering method is usually influenced by luminance,we use maximum color dis- tance to extract text connect components as supplements, which combines color with gradient information and can overcome the luminance influence to some extent. Then, the obtained connected components are grouped to form text lines following some character merging rules. The candidate text lines usually con- tain some falsely detected non-text ones. To improve text detection accuracy,feature extraction and ma- chine learning algorithms are finally used to identify the obtained candidate text lines, and we can get text localization results at last. The proposed method is evaluated on some publicly available datasets, inclu- ding the ICDAR2011 and ICDAR2013 datasets. For the ICDAR2011 dataset, the achieved recall, preci- sion and f-measure are 0.66,0.77 and 0.71 ,respectively,and those on the ICDAR2013 dataset are 0. 65, 0. 77 and 0. 70 ,respectively. The comparative results with some other text detection methods verify the feasibility and effectiveness of our method.

关 键 词：场景文本定位 色彩距离最小化 最大色彩差(MCD) 验证文本行 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]