Journal of Software:1999.10(11):1216-1224

A Robust Method for Unknown Structure Form Analysis
LI Xing-yuan,GAO Wen
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Received:May 12, 1998    Revised:November 23, 1998
> 中文摘要: 模型未知表格的分析是表格识别中文本分析阶段的一个重要且具有挑战性的问题.目前的一般方法仅能容忍表格线的微小断线.文章提出一种基于抽取表格线的分析结构未知表格的策略.利用抽取的表格线的特征知识和局部约束可以选择一些有效边.在扫描水平和垂直表格线时,如果环绕边都有效,则产生一个矩形块,引入迭代可以更好地利用全局信息并使抽取结果满足约束关系.这种矩形块的抽取可以容忍表格线大的断线或不合适的分割,可以处理诸如嵌入矩形块的复杂结构.矩形块被抽取后,表格的其他部件可以通过搜索剩余的部分来抽取.表格测试实验证明,该方法
Abstract:The analysis of unknown forms is a challenging and important problem in document processing. Current methods can only tolerate small breaks in form lines. In this paper, a strategy is proposed for analyzing unknown structure and filled forms based on extracted lines. Individual edges are validated using knowledge of features of the extracted lines and their local proximity. In a process of scanning the horizontal and vertical lines, candidate edges are validated and rectangles are generated if their surrounding edges and their combination are all valid. To preserve the constraints and make full use of global information, the process is recursively applied. The rectangle extraction can tolerate large breaks in form lines, ignore irrelevant segments and deal with complex configurations such as embedded rectangles. After rectangle extraction, other form components are extracted by searching the remaining segments. Experiments on a collection of forms with handwritten fields and documents with tables show that the proposed approach works well even on poor quality images.
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基金项目:本文研究得到国家自然科学基金、国家863高科技项目基金、国家教育部跨世纪人才基金和中国科学院“百人计划”基金资助. 本文研究得到国家自然科学基金、国家863高科技项目基金、国家教育部跨世纪人才基金和中国科学院“百人计划”基金资助.
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LI Xing-yuan,GAO Wen.A Robust Method for Unknown Structure Form Analysis.Journal of Software,1999,10(11):1216-1224