Inscription oriented Chinese character extracting method

An extraction method and technology of Chinese characters, applied in character and pattern recognition, instruments, computer parts, etc., can solve problems such as inability to remove texture background, inconsistent arrangement of Chinese characters, and high complexity

Active Publication Date: 2015-10-21
BEIHANG UNIV
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Problems solved by technology

This type of algorithm has a good positioning effect for images with a relatively single background, but its performance depends on the generation of initial connected domains, and it faces challenges for images with complex background textures; the second is an edge-based method, which focuses on text The high contrast between the background and the background has high time efficiency, but it cannot remove the complex texture background. It is often combined with other algorithms as the initial rough positioning; the third is the texture-based method. Wu et al. use three different scales A Gaussian filter is used to fil

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Embodiment Construction

[0028] Embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0029] The implementation process of the present invention is mainly divided into four steps: construction of Area Voronoi diagram, merging of Voronoi areas, segmentation of inscription image columns, and segmentation of individual characters.

[0030] Step 1. The construction of the Area Voronoi diagram is mainly divided into six basic steps:

[0031] (1) First, the image is divided into regions to obtain n non-overlapping connected domains, denoted as G={g 1 , g 2 ,...,g n}, each connected domain corresponds to a closed polygon, and its label value is k (k=1,2,...,n). At the same time, set the value of the background pixels in the image that are not divided into the connected domain as Background_VALUE.

[0032] (2) For each pixel located inside the connected domain, set its pixel value to the marker value k (k=1, 2, . . . , n) of the connected domain. ...

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Abstract

The present invention provides an inscription oriented Chinese character extracting method, mainly comprising two parts: a Chinese character region positioning method based on Area Voronoi and a single character segmentation method based on a communication field and a bounding box; and the method comprises the steps of: firstly, for a distribution rule and feature of Chinese characters in an inscription image, acquiring communication fields in the image as generators, and representing the contour of each communication field by using a Freeman encoding chain; constructing an Area Voronoi diagram of the image by using a contour boundary extension method; then according to a standard deviation between the communication fields, merging adjacent Area Voronoi regions so as to complete the positioning operation of a Chinese character region; after acquiring an image of the Chinese character region, performing pre-processing on the image and removing a certain noise influence; and by concluding structure features of the Chinese characters, combining a communication field analysis method with a bounding box overlapping judgment method, and performing single character extraction on the Chinese characters. According to the inscription oriented Chinese character extracting method provided by the present invention, for an arrangement rule of ancient inscriptions, the extraction work for a single Chinese character can be better completed, and the method has a certain noise immunity.

Description

technical field [0001] The invention belongs to the field of computer vision and computer graphics and image processing, and specifically relates to a method for locating text in an image and extracting individual characters. The method can facilitate the study of ancient Chinese characters and is of great significance for exploring the evolution law of ancient and modern Chinese characters. Background technique [0002] Inscriptions, as a traditional art form of calligraphy, record the development and evolution of Chinese characters from ancient times to the present. However, since the inscriptions have generally experienced a long historical period and are also affected by natural corrosion, it is not conducive to permanent preservation and dissemination. With the popularization of computers and the development of related scanning equipment, inscriptions can be scanned into digital images and stored in computers. Effective extraction of Chinese characters in inscriptions i...

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Application Information

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IPC IPC(8): G06K9/34G06K9/46
CPCG06V10/267G06V10/44G06V30/287
Inventor 齐越王晨王晓卿邹玲韩尹波罗江
Owner BEIHANG UNIV
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