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A method and device for extracting information

A technology of information extraction and location information, applied in the field of image processing, to achieve high accuracy and improve accuracy

Active Publication Date: 2022-02-25
IFLYTEK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This application provides an information extraction method and device, the purpose of which is to solve the problem of how to improve the correction effect of the deviation between the image to be processed and the template information, so as to extract more accurate information from the image to be processed

Method used

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  • A method and device for extracting information
  • A method and device for extracting information
  • A method and device for extracting information

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Embodiment Construction

[0056] The fundamental difference between the information extraction method disclosed in this application and the existing way of correcting the image to be processed by using calibration points to make the image to be processed adapt to the template image lies in: correcting the template information so that the template information adapts to the image to be processed.

[0057]The information extraction method disclosed in the embodiment of the present application can be used as a pre-processing step of character recognition. The purpose is to correct the template information, so that in the subsequent character recognition process, the template information can be used to extract more accurate information of interest from the image to be processed. area, thereby improving the accuracy of character recognition.

[0058] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawing...

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Abstract

The present application provides an information extraction method and device, which corrects template information according to the location information of an area similar to a reference area found in an image to be processed, and then uses the corrected template information to extract information from the image to be processed. Because the reference characters are the contents of the template image and the image to be processed, rather than the calibration points set for correction, compared with the common calibration points, the reference characters are relatively evenly and widely distributed in the image. Therefore, the The template information is updated based on the position of the reference character in the image to be processed, which can avoid the nonlinear error propagation problem caused by the calibration point, so it has higher accuracy, thereby improving the information extracted from the image to be processed accuracy.

Description

technical field [0001] The present application relates to the field of image processing, in particular to an information extraction method and device. Background technique [0002] The technology of automatically recognizing characters from images is widely used in various fields. In order to improve the accuracy of character recognition, the reference region in the template image is usually used to locate the reference region in the image to be processed, and then according to the reference region in the image to be processed, the region of interest is cut from the image to be processed, and the region of interest is identified characters in . Taking intelligent marking as an example, the image of the blank answer sheet is used as the template image, the image of the answer sheet filled by the examinee is used as the image to be processed, and the area occupied by the question number in the template image is used as the reference area to locate the image to be processed. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06V10/22G06V30/148
CPCG06V10/22G06V30/153
Inventor 潘鹏举何春江王根
Owner IFLYTEK CO LTD