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Image processing apparatus, image processing method, and computer program product

An image processing device and image processing technology, which can be used in image communication, character and pattern recognition, instruments, etc., and can solve problems such as image quality degradation

Inactive Publication Date: 2009-01-14
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If wrong rule lines are extracted from a multivalued image (i.e. cause over-extraction), the image quality will be degraded

Method used

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  • Image processing apparatus, image processing method, and computer program product
  • Image processing apparatus, image processing method, and computer program product
  • Image processing apparatus, image processing method, and computer program product

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Embodiment Construction

[0029] Exemplary embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] figure 1 is a structural diagram of an image processing apparatus according to a first embodiment of the present invention. figure 2 is a schematic diagram describing edge detection performed on boundary pixels of regular line candidates. image 3 is a schematic diagram of an example of a spatial filter according to the first embodiment of the present invention. Figure 4 is a flowchart of operations performed by the image processing apparatus according to the first embodiment of the present invention. Figure 5A and Figure 5B is a schematic diagram of another example of the spatial filter according to the first embodiment of the present invention.

[0031] like figure 1 As shown, the image processing apparatus according to the first embodiment of the present invention includes a multi-valued image receiving unit 9, a binary image g...

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Abstract

The present invention discloses an image processing apparatus and an image processing method. In an image processing apparatus, a binary image generating unit generates a binary image from a multi-value image, a ruled line candidate extracting unit extracts ruled line candidate pixels constituting a ruled line from the binary image, an edge detecting unit determines, from the multi-value image, target pixels that are positioned near the ruled line candidate pixels and detects edge information indicative of whether each target pixel constitutes an edge, and a ruled line obtaining unit obtains a ruled line from the multi-value image based on the edge information detected by the edge detecting unit.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims the priority of Japanese Priority Document 2007-183379 filed in Japan on July 12, 2007 and Japanese Priority Document 2008-134100 filed in Japan on May 22, 2008, the entire contents of which are incorporated by reference here. technical field [0003] The present invention relates to an image processing device and an image processing method. Background technique [0004] Various methods for extracting ruled lines from an image have been proposed; for example, Japanese Patent No. 3215163 discloses a long black line in the horizontal and vertical directions according to a binary image ) method of determining regular lines by the aspect ratio of the image, by performing rectangle extraction, selecting table area candidates, and extracting images of long black lines in the horizontal and vertical directions as regular lines. [0005] Furthermore, Japanese Patent No. 3344774 discloses a method of di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/20G06K9/34H04N1/41H04N1/56
Inventor 长谷川史裕矶野惠一
Owner RICOH KK