Parallel thinning with two-subiteration algorithms
Communications of the ACM
Hough transform based ellipse detection algorithm
Pattern Recognition Letters
Ellipse Detection Using a Genetic Algorithm
ICPR '98 Proceedings of the 14th International Conference on Pattern Recognition-Volume 1 - Volume 1
A robust and accumulator-free ellipse hough transform
Proceedings of the 12th annual ACM international conference on Multimedia
A comparison of fuzzy shell-clustering methods for the detection of ellipses
IEEE Transactions on Fuzzy Systems
Fast algorithm for detection of reference spheres in digital panoramic radiography
Computers in Biology and Medicine
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Ellipse is one of the most common features that appears in images. Over years in research, real-timing and robustness have been two very challenging problems aspects of ellipse detection. Aiming to tackle them both, we propose an ellipse detection algorithm based on pseudo-random sample consensus (PRANSAC). In PRANSAC we improve a contour-based ellipse detection algorithm (CBED), which was presented in our previous work. In addition, the parallel thinning algorithm is employed to eliminate useless feature points, which increases the time efficiency of our detection algorithm. In order to further speed up, a 3-point ellipse fitting method is introduced. In terms of robustness, a "robust candidate sequence" is proposed to improve the robustness performance of our detection algorithm. Compared with the state-of-the-art ellipse detection algorithms, experimental results based on real application images show that significant improvements in time efficiency and performance robustness of the proposed algorithm have been achieved.