Connectivity-based multiple-circle fitting. - Yu Qiao 002; S. H. Ong 001 (Pattern Recognit., 2004)

Thresholding based on variance and intensity contrast. - Yu Qiao 002; Qingmao Hu; Guoyu Qian; Suhuai Luo; Wieslaw L. Nowinski (Pattern Recognit., 2007)

Arc-based evaluation and detection of ellipses. - Yu Qiao 002; S. H. Ong 001 (Pattern Recognit., 2007)

Supervised grayscale thresholding based on transition regions. - Qingmao Hu; Suhuai Luo; Yu Qiao 002; Guoyu Qian (Image Vis. Comput., 2008)