Theodore Economopoulos Pantelis A. Asvestas George K. Matsopoulos Contrast enhancement of images using Partitioned Iterated Function Systems. 45-54 2010 28 Image Vision Comput. 1 http://dx.doi.org/10.1016/j.imavis.2009.04.011 db/journals/ivc/ivc28.html#EconomopoulosAM10