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Information locating method for document image based on standard template

A document image, standard template technology, applied in the field of image processing, can solve problems such as powerlessness, achieve the effect of intuitive information, does not affect the layout, and has wide applicability

Inactive Publication Date: 2014-06-04
方正国际软件(北京)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, this kind of image is mostly acquired by a scanner, and there is no perspective phenomenon; on the other hand, it is easier to locate each information in the table through the alignment of the table lines, but there is nothing that can be done without the table lines

Method used

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  • Information locating method for document image based on standard template
  • Information locating method for document image based on standard template
  • Information locating method for document image based on standard template

Examples

Experimental program
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Embodiment

[0074] In this embodiment, the image on the back of the ID card is used as an example to further describe the present invention. It should be noted that this embodiment is only for further illustration of the method of the present invention, and the information to be identified in this embodiment, namely Figure 6 The area coordinates of the "Issuing Authority" and "Limited Term" in the section are marked and positioned. In order to remove the influence of gray scale, the images in the attached drawings are all in the form of simple schematic diagrams, for example figure 2 In the binarized image, in the image to be processed obtained by taking the back image of the ID card or scanning, in addition to the text content shown in the figure, there should also be a background. When this embodiment is described , without taking into account the content of the background section.

[0075] Obtain the image of the back of the ID card through mobile phone shooting, and obtain the imag...

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Abstract

The invention discloses an information locating method for a document image based on a standard template. The method comprises the following steps: first, binaryzation processing and connected region analysis are performed on an image to be processed to obtain a series of candidate connected domains, and a group of connected domains with the characteristic of easy recognition is searched among the candidate connected domains; then, tilt correction and perspective correction are performed on a gray image of the image to be processed according to the acquired connected domains with the characteristic of easy recognition; and finally, the position of information to be recognized in the corrected image is located according to the positions of the connected domains with the characteristic of easy recognition. According to the invention, a locating method is provided by directly making use of image recognition, the acquisition process is simple and requires neither special equipment nor design of an exclusive bar code, and the method has a wider range of applications.

Description

technical field [0001] The invention relates to the field of image processing, and specifically relates to an information positioning method of a document image based on a standard template. Background technique [0002] In document image processing, there is a class of documents that have specific templates. Such as various documents, bank bills, express waybills, train tickets, etc. The acquisition of such document images may be in the form of scanning by a scanner, or shooting by mobile or handheld devices such as cameras and mobile phone cameras. In this type of document, in addition to text information, there are often images and tables, and the arrangement is more diverse (compared to book documents); the background of the text sometimes has shading interference; in addition to printed fonts, there are also handwritten fonts. At the same time, in the image acquired by the scanner, the tilting phenomenon of the document often appears; in the shooting of mobile and han...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/20
Inventor 胡希驰史培培杨镜
Owner 方正国际软件(北京)有限公司
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