Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A photocopy document image enhancement and binarization method

A document image, binarization technology, applied in the field of image processing, can solve the problem of signal-to-noise ratio image enhancement, etc.

Active Publication Date: 2016-04-06
CENT SOUTH UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above technical problems, the present invention provides a photocopy document image enhancement and binarization method, using the LC method of fusion image gradient information to realize local enhancement processing of the image, and then using the global self-adaptive Otsu method to realize image binarization Value-based, simple and effective solution to low signal-to-noise ratio image enhancement and binarization problems

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A photocopy document image enhancement and binarization method
  • A photocopy document image enhancement and binarization method
  • A photocopy document image enhancement and binarization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] Such as figure 1 As shown, a photocopy document image enhancement and binarization method includes the following steps:

[0029] Step 1: Perform grayscale processing on the input color image to obtain a grayscale image;

[0030] [Convert the color image to a grayscale image to reduce the amount of calculation;]

[0031] Step 2: Use Sobel horizontal and vertical operators to obtain the edge gradient of the local image block corresponding to each pixel, and the edge gradient vector The expression is as follows:

[0032] ▿ I ( x , y ) = G x G y ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an image enhancement and binaryzation method for a photoprint file. The image enhancement and binaryzation method for the photoprint file comprises the following steps of step one, graying input color images and obtaining graying images; step two, obtaining edge gradient of a regional image block which is corresponding to every pixel point through Sobel horizontal and vertical operator; step three, performing weight fusion improvement and LC regional enhancement and obtaining a weight fusion regional contrast value for every pixel point; step four, enabling the weight fusion regional contrast value for every pixel point to serve as a pixel value of the corresponding pixel point to obtain enhancement images of the input images. According to the image enhancement and binaryzation method for the photoprint file, the existing LC algorithm is performed on weight fusion improvement by improving the existing regional enhancement algorithm, the provided image enhancement algorithm is prior in effect compared with the existing file image enhancement and binaryzation method, has a good time performance and further improves the image preprocessing speed, and compared with the prior art, the image enhancement and binaryzation method is simple in parameter adjustment and the achievement process is simple and easy to operate.

Description

technical field [0001] The invention belongs to the field of image processing, in particular to a photocopying document image enhancement and binarization method. Background technique [0002] In the field of computer vision and image processing, image enhancement and binarization processing methods are one of the most basic and important research contents of image analysis and recognition. At present, there are many image enhancement and binarization methods, but most of the researches are aimed at The image captured by a video camera or camera, while the photocopy document image obtained by a copier or scanner is different from the scanning equipment and the subjectivity of the operator, so the commonly used image enhancement and binarization methods fail or have unsatisfactory results. In recent years, with the development of computer technology and network technology, more and more photocopied documents are uploaded to the network through copying or scanning, as importan...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
Inventor 龙军刘献如刘倩张昊李会玲赵忠杰
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com