Application of Improved Canny Algorithm on the IC Chip pin Inspection
Machine vision is widely used in chip pin automation detection of defects, the accuracy of image edge extraction for detection result has very big effect. Canny edge detection algorithm is a kind of edge detection algorithm which have good comprehensive evaluation, but the Gaussian filter algorithm it used may cause image too smooth and fuzzy of the edge, and it is very sensitive for impulse noise. This paper discusses the improved methods of Canny, proposes an improved switch median filter algorithm, which is applied into Canny algorithm, makes the edge of IC Chip pin more complete and remove noise better.
Y. Huang et al., "Application of Improved Canny Algorithm on the IC Chip pin Inspection", Advanced Materials Research, Vols. 317-319, pp. 854-858, 2011