Keyword search method and device based on image content

A keyword search and image content technology, which is applied in the field of search and positioning keywords, can solve the problems of low recognition rate and lack of verification measures, so as to achieve the effect of guaranteeing the effect, improving the accuracy and avoiding segmentation errors

Inactive Publication Date: 2011-12-21
FUJITSU LTD
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Problems solved by technology

However, these traditional methods lack effective verification measures, resulting in a low overall recognition rate.

Method used

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  • Keyword search method and device based on image content
  • Keyword search method and device based on image content
  • Keyword search method and device based on image content

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Embodiment Construction

[0029] The keyword search method and device according to the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] refer to figure 2 and image 3 The overall structure and operation flow of the keyword search device according to the embodiment of the present invention will be described.

[0031] figure 2 is a block diagram of an overall structure of a keyword search device according to an embodiment of the present invention. image 3 It is an overall flow chart of the keyword search method according to the embodiment of the present invention.

[0032] Such as figure 2 As shown, the keyword search device according to the present invention includes an overall matching unit 201 , a checking unit 202 , and a filtering unit 204 .

[0033] Such as image 3 As shown, the document image and keywords are input to the overall matching unit 201 (step S1), and the overall matching unit 201 calculates the matchin...

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Abstract

The invention provides a keyword search method and device based on image content. The keyword search device searches and locates the input keyword in the input document image, the keyword search device includes: an overall matching unit that extracts a plurality of candidate keyword image regions from the document image , extracting the image features of the plurality of candidate keyword image regions, and matching the image features with the characteristics of the keyword to obtain a matching distance corresponding to the plurality of candidate keyword image regions; checking unit, the verification unit identifies the first N candidate keyword image areas with small matching distances, and calculates the verification distance between the identification candidate and the keyword; the filtering unit calculates the matching distance and the The combined distance of the above-mentioned verification distance is used, and the candidate keyword image area with a large combined distance is filtered out according to the combined distance.

Description

technical field [0001] The invention relates to a device and method for quickly and accurately searching and locating keywords from document images. More specifically, it relates to an apparatus and method for automatically and accurately searching and locating the positions of keywords from document images when a user inputs keywords of interest (for example, "Beijing", etc.). Background technique [0002] A traditional method for locating keywords in a document image is usually implemented by using OCR (Optical Character Recognition, Optical Character Recognition) technology. In the traditional method of locating keywords, the document image is first segmented, and then the segmented single character area is recognized, the document image is converted into text, and keywords are searched in the recognized text for locating. For example, such a conventional device and method for locating keywords in a document image is disclosed in US patent application US6470336. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30G06K9/62
Inventor 黄开竹郑大念孙俊堀田悦伸藤本克仁直井聪
Owner FUJITSU LTD
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