摘要
数学表达式定位是印刷体数学表达式识别的前提。针对中文科技文档,分别对独立表达式和内嵌表达式的定位问题提出了新的方法。采用自适应神经模糊推理系统(ANFIS)对行特征进行分类,提取出独立表达式;采用模糊聚类和动态规划方法,从文档中依次提取出汉字、中文标点和英文字符,利用启发式规则合并剩余的数学符号而提取出内嵌表达式。实验表明,提出的表达式定位方法有很高的正确率。
Extraction of mathematical expressions is the first step of mathematical expressions recognition. A new approach for separating both isolated and embedded expressions in printed Chinese technical documents is presented. After the features of text lines are extracted, ANFIS is used to classify the text lines into two classes： lines of text and lines of isolated expressions. For embedded expressions, Fuzzy clustering and dynamic programming algorithm are applied to extract Chinese Characters, Chinese punctuations and English letters in sequence. At last, heuristic rules are used to merge mathematics into expressions. The methods proposed are proved to have high accuracy by experiments.
出处
《中文信息学报》
CSCD
北大核心
2007年第4期86-91,共6页
Journal of Chinese Information Processing
