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Multispectral imaging technology-based low-quality document image binarization method

A multi-spectral imaging and multi-spectral image technology, applied in the field of binarization of low-quality document images

Active Publication Date: 2017-01-04
HUBEI UNIV OF TECH
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  • Abstract
  • Description
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Problems solved by technology

However, low-quality document images in grayscale or color can be extremely challenging to process due to factors such as image contrast, ink smearing, page stains, or uneven lighting

Method used

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  • Multispectral imaging technology-based low-quality document image binarization method

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Embodiment Construction

[0072] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.

[0073] please see figure 1 A low-quality document image binarization method based on multispectral imaging (MSI) technology provided by the present invention mainly includes the following steps:

[0074] Step 1: Read the multispectral image;

[0075] Read the multi-spectral image of the document to be processed, including 1 ultraviolet spectrum (340nm), 3 visible spectra (500nm, 600nm, 700nm) and 4 infrared spectra (800nm, 900nm, 1000nm, 1100nm), and do linear normalization The calculation formula is as follows:

[0076] I ′ ...

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Abstract

The invention discloses a multispectral imaging technology-based low-quality document image binarization method. The method comprises the four steps of reading a multispectral image; performing spectral component image thresholding; performing target detection; and performing threshold image fusion processing. Compared with other classical document image binarization methods, the multispectral imaging technology-based low-quality document image binarization method provided by the invention has remarkable advantages in output image quality and algorithm performance index; and while character stroke details are well reserved, the phenomena of ink mark infiltration, page blots, texture backgrounds, non-uniform illumination and the like can be effectively suppressed.

Description

technical field [0001] The invention belongs to the technical fields of digital image processing, pattern recognition and machine learning, and in particular relates to a low-quality document image binarization method based on multi-spectral imaging (MSI) technology. Background technique [0002] The digitization of historical documents refers to the use of modern information technology to process ancient books and documents, transform them into electronic data, and store and disseminate them through CD-ROMs, networks and other media. The digitization of historical documents is the reproduction and processing of ancient books or the content of ancient books, and it is an important means of regenerative protection of ancient books. [0003] At present, the problem of image processing of ancient books has attracted the attention of many researchers, and the academic community has also proposed a variety of document image processing methods, which can be roughly divided into tw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/38G06K9/46G06T7/00
CPCG06T2207/20221G06T2207/10036G06V10/28G06V10/44G06V10/462
Inventor 熊炜李敏徐晶晶赵诗云赵楠刘敏王改华吴俊驰刘小镜
Owner HUBEI UNIV OF TECH
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