Document table line detection method and system based on binary image segmentation projection

Abstract

The invention belongs to the technical field of text image recognition, and in particular relates to a document table line detection method and system based on binary image segmented projection, aiming to solve the problem of the accuracy of table line recognition caused by unstable image quality of document images and a system. Insufficient robustness problem. The method of the invention includes: binarization processing of the input image; dividing rectangular sub-images of equal width and length along the horizontal direction, and calculating the projection value of each pixel row; acquiring the rectangular frame representing the table line segment in each sub-image; Figure, obtain the table line candidate path; select the rectangular box corresponding to the table line candidate path according to the length information to obtain the first table line set, rotate the first image to obtain the table line by the above method, and obtain the second table line set after you rotate. The invention is not affected by the specific table type, has good versatility, and can perform table line recognition under the condition of unstable document image image quality, thereby improving recognition accuracy and robustness.

Description

technical field [0001] The invention belongs to the technical field of text image recognition, and in particular relates to a document table line detection method and system based on binary image segmentation projection. Background technique [0002] The development of science and technology has made the way of information processing advance by leaps and bounds. In order to realize the processing of information editing, searching and data analysis, it is of great significance to quickly input the text information of paper materials into the computer. OCR (Optical Character Recognition) technology was born. Document images widely exist in various fields such as transportation, finance, logistics, taxation, administrative management, etc. With the rapid popularization of intelligent terminals, the automatic identification technology of document photographing has great economic benefits and extensive social value. [0003] Among these documents, there is a special type of docum...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem of insufficient accuracy and robustness of table line recognition caused by unstable image quality of document images, the first aspect of the present invention proposes a method based on binary A document table line detection method for graph segment projection, the method comprising:

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