A Novel Method For Spatial Measurement Of Holes

L. H. Bieman

doi:10.1117/12.937831

22 January 1987 A Novel Method For Spatial Measurement Of Holes

L. H. Bieman

Proceedings Volume 0728, Optics, Illumination, and Image Sensing for Machine Vision; (1987) https://doi.org/10.1117/12.937831
Event: Cambridge Symposium_Intelligent Robotics Systems, 1986, Cambridge, MA, United States

Abstract

Accurately locating the three dimensional position of a hole is critical for many manufacturing applications of machine vision. A novel method for locating a hole combines the use of backlighting with structured light. The centroid of the image of the backlit hole defines a line in space along which the center of the actual hole must lie. The cross of structured light is then used to determine the plane( surface ) on which the hole is located. Hence, the intersection of the line and plane defines the three dimensional position of the hole in space. The strength of the approach is the large amount of data used to obtain both the line position and the plane location. Thus, the approach is robust and has good immunity to noise, unlike many pure structured light techniques. The approach is also unaffected by changes in the orientation of the hole. It avoids the difficult problem encountered in stereo vision of having to create good images from two different viewing angles.

Citation Download Citation

L. H. Bieman "A Novel Method For Spatial Measurement Of Holes", Proc. SPIE 0728, Optics, Illumination, and Image Sensing for Machine Vision, (22 January 1987); https://doi.org/10.1117/12.937831

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