基于循环投影统计的数学公式自动定位方法

Mathematical Formula Automatic Location Method Based on Circular Projection Statistics

摘要: 数学公式自动识别的第一步就是数学公式定位，只有从文档图像里正确定位出公式，后续的步骤如公式符号识别、公式版面分析、公式语义分析才能进行。本文根据中文文字特性，设计了一种基于循环投影统计的数学公式定位方法，该方法首先通过投影来统计关键信息，然后提取出可疑行，最后通过一系列条件进行可疑行的确认。实验结果表明本文提出的方法在计算成本非常低的前提下能保证结果的正确性。

Abstract: The location of mathematical formulas is the first step to recognize mathematical formula. Only when the formula in the document image is located correctly, one can complete the following steps such as formula symbol recognition, formula document analysis and formula semantic analysis. According to the characteristics of Chinese characters, this paper presents a method for automatic extraction of mathematical formula based on circular projection statistics. This method firstly collects key information through projection, and then extracts the potential line. Finally, mathematical formulas are extracted using a series of constraint conditions. The experimental results show that the method proposed in this work offers correctness of the results at very low computational costs.