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File-image cutting method based on Chinese characteristics

A document image and image technology, which is applied in the field of computer digital image processing, can solve the problems of complex calculation and broken Chinese characters, and achieve the effect of simple calculation and not easy to break Chinese characters

Inactive Publication Date: 2008-10-22
COMMUNICATION UNIVERSITY OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The calculation of this method is relatively complicated, and the block processing of the image may easily cause the breakage of Chinese characters

Method used

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  • File-image cutting method based on Chinese characteristics
  • File-image cutting method based on Chinese characteristics
  • File-image cutting method based on Chinese characteristics

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Experimental program
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Embodiment Construction

[0143] according to figure 1 Embodiments of the present invention are configured. Computer is " Tsinghua Tongfang microcomputer, Intel (R) Celeron (R) CPU 3.20GHz, 256M memory, 80G hard disk " among the present embodiment. Adopt VC++6.0 programming to realize.

[0144] The specific implementation plan is:

[0145] 1. Color image to grayscale image conversion scheme:

[0146] If the input image is a color image, use the following formula to convert:

[0147] Y=0.299×R+0.587×G+0.144×B

[0148] Among them, Y is the converted gray value, R, G, and B are the three color components of the color image before conversion, R represents red, G represents green, and B represents blue, and their values ​​are all in [0, 255 ] range.

[0149] 2. Recursive layering scheme:

[0150] Assuming that the gray value change interval of the image to be layered is [t 1 , t 2 ](t 1 2 ), when δ t t (c=0.1) or n t When >d×n (d=0.2), stop layering this image, otherwise, continue layering recur...

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Abstract

A method for dividing file image based on Chinese character feature includes fetching file image and converting image to be grey scale if image is color image, carrying out recurrence layering according to maximum value obtained based on ratio of maximum type space to minimum type internal space, sequencing each layered image and combining sequenced sub-layer images, carrying out text division on combined sub-layer image and combining divided results of various sub-layer images to be final result.

Description

technical field [0001] The invention relates to a document image segmentation method based on Chinese character features, which is aimed at segmenting color or grayscale scanned images and belongs to the technical field of computer digital image processing. Background technique [0002] Document image segmentation algorithms are widely used in image processing such as printing, faxing, OCR (Optical Character Recognition, optical character recognition), document image compression, etc. It makes it easier to efficiently search and store text images in large databases. A powerful tool for extracting document data. [0003] Existing methods for document image segmentation can be broadly classified into block-based and layer-based segmentation methods. Block-based segmentation methods first block the input image and then process each sub-image block. Based on the layered segmentation method, the input image is layered according to a certain criterion, and then each sub-layer im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/34
Inventor 黄祥林杨朝吕锐杨占昕
Owner COMMUNICATION UNIVERSITY OF CHINA