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Method and device for extracting document boundaries

A document and boundary technology, applied in the field of image processing, can solve problems such as difficult to extract documents, affect the performance of boundary extraction, and difficult to describe document boundaries, etc., to achieve the effect of reducing the impact

Active Publication Date: 2019-11-22
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods face the following problems: the content of the document often affects the boundary extraction performance, so it is difficult to accurately extract the inner boundary of the document; in addition, it is difficult to use the method of the model to describe the document boundary

Method used

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  • Method and device for extracting document boundaries
  • Method and device for extracting document boundaries
  • Method and device for extracting document boundaries

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Embodiment Construction

[0028] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Elements and features described in one drawing or an embodiment of the present invention may be combined with elements and features shown in one or more other drawings or embodiments. It should be noted that, for the purpose of clarity, representations and descriptions of components and processes that are not related to the present invention and known to those of ordinary skill in the art are omitted from the drawings and descriptions.

[0029] Those skilled in the art can understand that the terms "upper", "lower", "inner", "outer" and other terms used in the present invention are only for convenience of description, and are not specific limitations on the positions of the involved features.

[0030] The inventor of the present invention found that in a 2D document image with 3D information, the document boundary can be extracted more accurately by using the difference betwee...

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Abstract

The invention provides a method and device for extracting document boundaries. A method for extracting a document boundary according to an embodiment includes: obtaining the depth of a reference plane; obtaining a document image of a document placed on the reference plane; obtaining the depth of a three-dimensional point of the document image; based on the depth of the reference plane and the three-dimensional point of the document image The depth of the document extracts the boundary of the document in the document image. According to the method and device for extracting the document boundary in the embodiments of the present invention, the reference plane and the depth of the three-dimensional points in the document image can be used to extract the document boundary in the document image, thereby reducing the influence of the content of the document on the boundary extraction.

Description

Technical field [0001] The present invention relates to an image processing method, and more specifically, to a method and device for extracting document boundaries based on three-dimensional (3D) information in a two-dimensional (2D) image. Background technique [0002] With the development of information technology and the popularization of office automation, more and more documents are stored in image format. Generally, the image of the document is acquired by an acquisition unit such as a scanner or a digital camera. But in the document image, the existence of the background area may reduce the user's reading experience. [0003] In addition, when using a scanner or, in the worst case, a digital camera to obtain a document image, the image usually has a distortion problem. The distortion of the document image brings great difficulties to the subsequent processing work, such as OCR recognition, digital document layout analysis and document automation. [0004] Edge detection is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00
CPCG06V30/414
Inventor 汪留安范伟孙俊
Owner FUJITSU LTD