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Technique for detecting a defect of an object by area segmentation of a color image of the object

A region segmentation, image technology, applied in image analysis, image enhancement, image data processing and other directions

Inactive Publication Date: 2006-02-01
DAINIPPON SCREEN MTG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a problem is very prominent in the defect detection of through-holes using an image inspection device, but it is generally a common problem in the defect detection objects of inspection objects.

Method used

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  • Technique for detecting a defect of an object by area segmentation of a color image of the object
  • Technique for detecting a defect of an object by area segmentation of a color image of the object
  • Technique for detecting a defect of an object by area segmentation of a color image of the object

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no. 2 example

[0039] C.Modification

[0040] A. The first embodiment

[0041] figure 1 It is an explanatory diagram showing the configuration of a printed circuit board inspection device 100 as an embodiment of the present invention. This printed circuit board inspection device 100 includes: a light source 20 for illuminating a printed circuit board PCB; an imaging unit 30 for capturing an image of the printed circuit board PCB; and a computer 40 for controlling the entire device. An external storage device 50 storing various data and computer programs is connected to the computer 40 .

[0042] The computer 40 has the functions of an image acquisition unit 210 , a region division unit 220 , a specific region extraction unit 230 , a comparison image acquisition unit 240 , and a comparison evaluation unit 250 . The functions of these respective parts are realized by the computer 40 executing a computer program stored in the external storage device 50 .

[0043] figure 2 It is an explana...

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PUM

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Abstract

The present invention provides a technique to prevent increase in defect detection processing volume due to the shape of an object subject to the defect detection. An image of an object under inspection with a plurality of color regions is divided into areas by area segmentation according to colors. From the result of the segmentation, an inspection image representing a shape of a specific region among the plurality of color regions is obtained. The inspection image and a comparison image which is comparable at least in part with the inspection image are then compared to detect defects relating to the specific region.

Description

technical field [0001] The present invention relates to a technique for acquiring defects of an inspection target object by region segmentation of an image. Background technique [0002] A printed circuit board for constituting an electronic circuit is provided with through holes (holes) for conduction between layers and insertion of components. Abnormalities in the positions and shapes of the through holes, clogging of the through holes, and the like cause conduction failure and component insertion failure. Accordingly, various image inspection devices for detecting such abnormalities (defects) appearing in via holes have been proposed (for example, refer to Patent Document 1). [0003] Patent Document 1 is Japanese Patent Application Laid-Open No. 8-191185, [0004] Patent Document 2 is Japanese Patent No. 2500961. [0005] However, in the case of detecting through-hole defects using these image inspection devices, it is necessary to extract feature quantities such as t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/34G06K9/46G06K9/62G01N21/88
CPCG06T7/001G06T2207/30141
Inventor 永田泰史今村淳志佐野洋
Owner DAINIPPON SCREEN MTG CO LTD