| 信息填涂卡文档图像预处理算法的研究 |
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| 引用本文： | 肖道举,姚园,陈晓苏.信息填涂卡文档图像预处理算法的研究[J].华中科技大学学报(自然科学版),2004,32(3):89-91. |
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| 作者姓名： | 肖道举 姚园 陈晓苏 |
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| 作者单位： | 华中科技大学,计算机科学与技术学院,湖北,武汉,430074;华中科技大学,计算机科学与技术学院,湖北,武汉,430074;华中科技大学,计算机科学与技术学院,湖北,武汉,430074 |
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| 摘 要： | 阐述了信息填涂卡文档图像标记识别系统中的预处理算法．对信息填涂卡文档图像预处理中的图像二值化、图像偏斜纠正以及图像平滑等关键步骤进行了描述．在图像二值化过程中采用全局阈值法，在图像偏斜纠正过程中给出了一种基于Wingner-Ville分布和水平投影直方图的偏斜纠正算法，在图像平滑过程中采用特定的同步孔平滑算法．结果表明这些算法能有效地解决信息填涂卡文档图像预处理问题．
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| 关 键 词： | 标记识别 预处理 二值化 偏斜纠正 图像平滑 |
| 文章编号： | 1671-4512(2004)03-0089-03 |
| 修稿时间： | 2003年10月14 |
Pre-processing algorithm for document image of information card |
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| Xiao Daoju Yao Yuan Chen Xiaosu Xiao Daoju Assoc. Prof., College of Computer Sci. & Tech.,Huazhong Univ. of Sci. & Tech.,Wuhan ,China..Pre-processing algorithm for document image of information card[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2004,32(3):89-91. |
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| Authors: | Xiao Daoju Yao Yuan Chen Xiaosu Xiao Daoju Assoc Prof College of Computer Sci & Tech Huazhong Univ of Sci & Tech Wuhan China |
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| Institution: | Xiao Daoju Yao Yuan Chen Xiaosu Xiao Daoju Assoc. Prof., College of Computer Sci. & Tech.,Huazhong Univ. of Sci. & Tech.,Wuhan 430074,China. |
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| Abstract: | This paper discussed a series of pre-processing theory and an algorithm for analyzing document image of information card based on optical mark recognition. Image binarizing, skew angle correction of image and image smoothing in pre-processing were described. Global threshold method was applied to image binarizing. An algorithm based on Wingner-Ville Distribution and Horizontal histogram was presented in skew angle correction of image. The proposed algorithm of special synchronous region smoothing was applied to image smoothing. The result showed that these methods could meet the need of pre-processing document image. |
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| Keywords: | mark recognition pre-processing image binarizing skew angle correction image smoothing |
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