In the tile size detection system based on machine vision , in order to locate the tile corner point after the edge is detected , the edge is also fited .In this paper , because of the low accuracy of Hough transform in fitting tile edge, the Hough transform and least squares method are combinedly used to fit the tile edges .First, the Hough transform is applied to edge points , and then take points near the straight gotten by Hough transform for the least squares fitting , thus locating the corner .The experiments show that the method has a precision and anti-int...
