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Method and system for distinguishing language of document image

A document image and discriminant technology, which is applied in character and pattern recognition, instruments, computing, etc., can solve the problems of distinguishing between Simplified Chinese and Traditional Chinese, and the speed of language discrimination is unacceptable

Inactive Publication Date: 2009-12-02
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these prior art only use the word with the best recognition confidence to decide the language set
Since there are many characters of the same shape in the two language sets, Simplified Chinese and Traditional Chinese, Simplified Chinese and Traditional Chinese cannot be distinguished well by these existing techniques
Also, if only dictionary methods are used to discriminate languages, the speed of language discrimination is unacceptable

Method used

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  • Method and system for distinguishing language of document image
  • Method and system for distinguishing language of document image

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Embodiment Construction

[0072] First, we will explain some basic concepts used in this specification, which are as follows.

[0073] - Language family / language set

[0074] In this specification, a language family / language set refers to a Chinese-based or Latin-based language. The Chinese-based language family includes three East Asian languages, which are Chinese (both Simplified and Traditional), Japanese, and Korean. The Latin-based language family mainly includes European languages.

[0075] -connected domain

[0076]In an undirected graph, a connected domain is a maximally connected subgraph. Two vertices are in the same connected domain if and only if there is a path between them. When plotting, each connected domain can be plotted separately with empty intervals between them. A non-empty connected graph has at least one connected domain.

[0077] - Circular / Circular Connected Domain

[0078] The shape of a circular / circular connected domain resembles a circle or ellipse, not a rectangle...

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Abstract

The invention provides a method and a system for distinguishing the language of a document image, comprising the following steps: detecting the round white pixel connection domain in the document block of the document file, and determining whether the document block is a Korean on the basis of the detecting the round white pixel connection domain.

Description

technical field [0001] The present invention relates to a method and system for language discrimination of document images in East Asian languages, such as Korean, Japanese, Simplified Chinese and Traditional Chinese. Background technique [0002] Optical character recognition (OCR) systems are language-dependent systems. An OCR device is trained to recognize a specific language. If the OCR device is run in an inappropriate language, the OCR device will not be able to process the document correctly and will not be able to achieve high accuracy. Therefore, language family or language discrimination is a very important preprocessing step in automatic document recognition. [0003] Various techniques for classifying language families (Latin-based language families and Chinese-based language families) and discriminating languages ​​have been developed. [0004] A.L.Spitz discloses a prior art in an article entitled "Determination of the Script and Language Content of Document...

Claims

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Application Information

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IPC IPC(8): G06K9/68G06K9/72
Inventor 陈刚罗兆海
Owner CANON KK
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