Affiliation: | a CENPARMI Computer Science, Concordia University, Suite GM-606, 1455 de Maisonneuve W., Montreal, Que. Canada H3G 1M8 b Laboratory for Imagery, Vision and Artificial Intelligence, École de Technologie Supérieure, University of Québec, 1100, Notre-Dame West, Montréal, Qué. Canada H3C 1K3 |