关键词: 图像文档检索, 文档图像分割, 文本布局块, 距离函数, 匈牙利算法

Abstract:

The existing methods of document retrieval based on the conversion of image documents into text can not meet the processing scenes of todays large number of digital image databases. This paper proposes a document image retrieval method based on text layout block. According to the feature of distance between text blocks, a new distance function is defined. Then, the new distance function is used to calculate the distance matrix between text blocks. Finally, the best matching result is obtained by combining the Hungarian algorithm. A lot of experiments show that this method can effectively improve the image document retrieval accuracy, and can guarantee the correct rate of 782%.

Key words: image document retrieval, document image segmentation, text layout block, distance function, Hungarian algorithm