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Image binarization method and device

An image binarization and binarization technology, applied in the field of image processing, can solve problems such as failure

Inactive Publication Date: 2007-09-26
RICOH KK +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method will fail in the case of large characters, low contrast and reversed fonts

Method used

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  • Image binarization method and device
  • Image binarization method and device
  • Image binarization method and device

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Embodiment Construction

[0024] In this paper, the global segmentation method refers to using the same threshold to segment the entire image, while the local adaptive segmentation method refers to determining an individual segmentation threshold for each pixel in the image. If the gray levels of text and other useful information in the entire image are consistent, the entire image can be segmented using a global segmentation method. However, due to the inconsistency between different regions in many images, it is difficult to achieve good segmentation results with a single segmentation threshold. In this case, it is necessary to use a local adaptive segmentation method to determine different segmentation thresholds for different pixels.

[0025] The image binarization method and image binarization device according to the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Referring to FIG. 1 , the flow chart of the image binarization method propos...

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Abstract

This invention provides one binary state pattern method for files images and its device, which comprises the following steps: a, aim for the said file image grey data computing the said file image complexity and accordingly sorting the images into simple and complex types; b, when it is of simple type, through whole cutting method of the grey image data and when the file image is of complex type, through complex cut method binary image data to generate binary image data.

Description

technical field [0001] The invention relates to the field of image processing, in particular to an image binarization method and device for binarizing document images. Background technique [0002] Documents are the main information carrier in the current society. Document images are generally composed of text, tables, lines, and pictures, and since the information of document images is essentially binary information, ideally, it can be represented by a single foreground and background, such as white for the background, black Indicates useful information, that is, foreground. However, in practical applications, due to the printing process, uneven reflection, the diversity of the content of the document itself, and various rich artistic effects, the foreground and background of the image usually change. The purpose of document image binarization is to separate useful information from useless information and represent the result as a binary image. [0003] Image binarizatio...

Claims

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Application Information

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IPC IPC(8): G06K9/38
Inventor 郝英李滔
Owner RICOH KK
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