说明：  circle detection using hough transform 作者：D J Kcrbywn and T J Atherton， University of Warwick, U.K.霍夫检测圆的IEEE,1995的文章，对指导霍夫变换圆检测的原理有一定的指导。
(circle detection using hough transform Author: DJ Kcrbywn and TJ Atherton, University of Warwick, UK Hough circle detection IEEE, 1995 article in guiding Hough transform circle detection principle must have the guidance.)