Humberto Bustince Sola Edurne Barrenechea Tartas Miguel Pagola Raul Orduna Construction of Interval Type 2 Fuzzy Images to Represent Images in Grayscale. False Edges. 1-6 2007 FUZZ-IEEE http://dx.doi.org/10.1109/FUZZY.2007.4295343 conf/fuzzIEEE/2007 db/conf/fuzzIEEE/fuzzIEEE2007.html#SolaTPO07