CIRCULAR-ARC DETECTION BASED ON HOUGH TRANSFORM

A new method is proposed to detect circular arcs. The detection of a c ircular are includes the determination of its center, radius, length, and midpoint. The Hough transform is applied to detect circular arcs b y using center and radius as parameters. A peak value in the parameter space of the Hough transform indicates the existence of a circular ar e. The center and radius of the circular are are given by the coordina tes of the peak. The are points are separated from the remaining edge points of the image. Then, the near-peak Hough transform data of the a re points is analyzed to determine the are length and midpoint.