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A Practical Method for Circular Hole Measurement Based on Machine Vision
Abstract:
Non-contact Measurement of circular hole, which based on machine vision is already used for industrial applications. In this paper, a novel practical method to obtain parameters of a circular hole from an image is presented. The main idea of the proposed method is that we use gradient information to find a region that contains possible centers of the circle (the hole) and use evidence-collecting process to obtain the reasonable radius. This method fits the situation that the hole object in a image is totally brighter or darker than its background. Experimental results demonstrate that our method can detect the hole with the acceptable precision and stability for practical applications.
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837-842
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Online since:
August 2011
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© 2011 Trans Tech Publications Ltd. All Rights Reserved
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