Naoko Ito Yoshihisa Shimazu Teruo Yokoyama Yutaka Matsushita Fuzzy Logic Based Non-Parametric Color Image Segmentation with Optional Block Processing. 119-126 1995 ACM Conference on Computer Science http://doi.acm.org/10.1145/259526.259546 db/conf/acm/csc95.html#ItoSYM95