Document image geometry fault correction method

A technology of geometric distortion and correction method, which is applied in the field of image processing and correction of geometric distortion of manuscript image, can solve problems such as table interference, corrected area falling, layout analysis, segmentation error, etc., to improve recognition rate, Good correction effect, the effect of image subjective quality improvement

Active Publication Date: 2006-07-19
NEW FOUNDER HLDG DEV LLC +2
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Problems solved by technology

If these features are combined with the complex factors of the layout, the method for analyzing text lines in the prior art will be completely ineffective: 1) when there are serious text bending, image, table interference, and text lines not running through the left and right, etc., through the horizontal Where the projected unobtainable text is located
2) After obtaining the approximate position of the text line, it is difficult to distinguish the text line from the image, table, lace, etc. If the image, table, and lace are regarded as the text line, due to their large differences in height and position, use the calculated The curve obtained by fitting the center line cannot reflect the real distortio

Method used

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  • Document image geometry fault correction method
  • Document image geometry fault correction method
  • Document image geometry fault correction method

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Embodiment Construction

[0046] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0047] figure 1 A schematic flow diagram of each step of the method of the present invention is listed, including the following steps:

[0048] (1) Binarize non-binary images first;

[0049] In this embodiment, in step (1), the layout can also be pre-analyzed, the text, image, table and other areas in the image are determined in advance, and then better correction is made according to the characteristics of different areas. However, due to the distortion of the image, it is difficult to ensure the correctness of the automatic layout analysis, especially when the layout is complicated, it is often necessary to manually re-adjust. Therefore, in the case of automatic correction, it is not necessary to analyze the layout and directly analyze the entire image. In this embodiment, a method of directly performing analysis on the entire graph is adop...

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Abstract

The invention relates to a method for adjusting the distorted image with complex text content in the field of the image processing technology of computer information processing. The current technology uses level projection to find the position of the text line, and impacts the text line center line to adjust it. But when the content occurs to the non-text area such as image, form and so on or the text bending strongly, it can't find the text line to do subsequent processing.

Description

Technical field [0001] The invention relates to image processing technology in the field of computer information processing, in particular to a method for correcting geometric distortion of document images. Background technique [0002] Distorted image correction is a very useful image processing technology. Generally, there are two types of correction methods. One is to set some known reference points on the image and perform correction based on the comparison of the reference points before and after the distortion; the other is It is no-reference correction, which is completely corrected by analyzing the characteristics of the image itself. [0003] For the former type, the general approach is to add some known reference points to the image through a certain method, that is, the correspondence between some pixels of the undistorted image and the coordinates of the corresponding pixels of the distorted image, as the basis for correction. For example, a layer of grid is pasted on...

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Application Information

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IPC IPC(8): G06K9/00
Inventor 康凯杜鹏飞刘芝贺白
Owner NEW FOUNDER HLDG DEV LLC
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