Research on the digitization system of scientific documents

1.在整个研究过程中，我们建立了一个数学论文页面图像的真实数据库。利用该数据库，我们开发和改进了数学符号识别引擎以及文本区域和数学表达式区域的分割方法。为了改进前人研究中提出的基于虚拟链路网络的数学结构分析方法，我们利用上述数据库对网络的链路费用进行了详细的调整。另一方面，我们引入了“中心带”的概念，对字符的误识别进行了稳健的计算，从而在很大程度上稳定了数学表达式的结构分析。3.我们提出了一种利用子模式与同一页面中其他非接触字符模式的匹配来分割数学表达式中接触字符的方法。4.提出了一种基于可变块模式元素的复杂矩阵识别方法。5.研究了从识别结果中检测数学试卷的书目数据和逻辑结构的方法。6.研究了数学试卷中交换图和初等函数图形的识别方法。7.利用本研究成果开发的数学文档识别软件“Infty Reader”可从以下网站免费获得：http://www.inftyproject.org./

1.Throughout the research period, we build a ground-truthed database of page images of mathematical articles. Using the database, we developed and improved the math symbol recognition engine and the segmentation method of text areas and math expression areas. A part of the database is now open to public on our web site.2.To improve the math structure analysis method base on virtual link network developed in the previous research, we adjusted the cost of the links of the network in detail using the database above. On the other hand, we introduced a notion of "center band", calculated robustly against mis-recognition of characters, to stabilize considerably the structure analysis of math expressions.3.We developed a method to segment touched characters in math expressions using the matching of sub-patterns with other non-touched characters patterns in the same page. We also extended a framework used frequently to segment characters in text areas in a way adapted to math formulae images4.We developed a method to recognize complicated matrices including repeat symbols or area symbols, using variable block pattern elements.5.We investigated the method to detect bibliographic data and logical structure of math papers from the recognition results.6.We finally studied the recognition of commutative diagrams in math papers and graphs of elementary functions in the figures of math texts as well. These are however still on the state of trial research.7.A math document recognition software "Infty Reader" developed using the results of this research is available freely from the web site : http://www.inftyproject.org./