Finding circular shapes in an image on a pyramid architecture

Casasent, 1987, Curve object location by Hough transformations and inversions, Pattern Recognition, 20, 181, 10.1016/0031-3203(87)90052-5 Duda, 1972, Use of the Houg transformation to detect lines and curves in pictures, Comm. ACM, 15, 11, 10.1145/361237.361242 Hough, 1962 Kavianpour, 1991, Parallel Hough transform for image processing on a pyramid architecture, 395 Kavianpour, 1991 Kimme, 1975, Finding circles by an array of accumulators, Comm. ACM, 18, 120, 10.1145/360666.360677 Rosenfeld, 1969