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Q. Zhu, Noël Richard received his PhD in signal processing from the University of Poitiers (France, 1993), where he is currently an Associate Professor. He coordinates axe1 of the NUMERIC research program, which is dedicated to digital services involving 19 laboratories, 180 researchers, regional and ERDF funds. He is also the technical chair of the CIE TC8-14 (spatio-chromatic complexity definition and assessment), Author Biography Hilda Deborah received her BSc in computer science from the University of Indonesia, vol.14, pp.21-34, 1996.

C. Fernandez, She is currently a professor and vice-rector in charge of international relations at the University of Poitiers, director of MIRES, research federation. Her research activities focus on colour imaging, colour image and video filtering, segmentation, Maloigne graduated as a computer engineer (1986) and obtained her PhD degree in Image Processing, 1989.