Method and device for recognizing table cells in scanned image

Abstract

The invention discloses a method and a device for recognizing table cells in a scanned image, comprising the following steps: acquiring horizontal line segments and vertical line segments in the scanned image of a table document; removing the horizontal line segments and the vertical segments which are less than the first threshold value in the scanned image, wherein, the first threshold value isset according to the height of the minimum character in the scanned image and the resolution ratio of the scanned image; and recognizing the table cells in the scanned image according to the remainedhorizontal line segments and vertical line segments. The invention not only has the characteristic of high recognition success rate of the traditional line detection algorithm, but also can improve the recognition speed of the table cells in the scanned image under the premise of ensuring high recognition rate.

Description

technical field [0001] The invention belongs to the technical field of image recognition, and in particular relates to a method and a device for recognizing table units in a scanned image. Background technique [0002] Tables are commonly used data carriers in documents and are widely used in various occasions. In order to facilitate the automation and electronic processing of paper forms, a fast form automatic recognition method is needed to determine the position and size of each unit in the form, the purpose of which is to facilitate the next step to obtain the contents of the form units and send them to subsequent modules Carry out OCR (Optical Character Recognition, optical character recognition), automatic form filling and other processing. [0003] Form recognition methods commonly used in the prior art include projection method, search method, line detection method and the like. [0004] The projection method is to project the table image vertically and horizontall...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is difficult to deal with thin and slightly skewed or complex tables

[0005] The search method is to traverse along the table lines. The disadvantage of this method is that it is difficult to deal with burrs, broken lines and character adhesion.

The disadvantage of this type of method is that the recognition success rate of the table unit is very high, but the disadvantage is that the calculation amount is large and the calculation speed is slow, which limits its application occasions.

[0007] Therefore, in the current prior art, there is no automatic identification scheme for table units that can improve the recognition speed of table units in scanned images under the premise of ensuring a high recognition rate.

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