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"| 基于End to End的方法 | 利用attention机制 | [Table-Master](https://arxiv.org/pdf/2105.01848v1.pdf)|\n",
"\n",
"### 2.2 基于启发式规则的传统算法\n",
"早期的表格识别研究主要是基于启发式规则的方法。例如由Kieninger[1]等人提出的T-Rect系统使用自底向上的方法对文档图像进行连通域分析，然后按照定义的规则进行合并，得到逻辑文本块。而之后由Yildiz[2]等人提出的pdf2table则是第一个在PDF文档上进行表格识别的方法，它利用了PDF文件的一些特有信息（例如文字、绘制路径等图像文档中难以获取的信息）来协助表格识别。而在最近的工作中，Koci[3]等人将页面中的布局区域表示为图（Graph）的形式，然后使用了Remove and Conquer(RAC)算法从中将表格作为一个子图识别出来。\n",
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