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J.  Coughlan, Manduchi, R., and Shen, H., ?Cell Phone-based Wayfinding for the Visually Impaired?, in 1st International Workshop on Mobile Vision, Graz, Austria, 2006.\par \par J.  Coughlan, Manduchi, R., and Shen, H., ?Computer Vision-Based Terrain Sensors for Blind Wheelchair Users?, in Proceedings of the International Conference on Computers Helping People (ICCHP), 2006.\par \par J.  Coughlan, Manduchi, R., Mutsuzaki, M., and Shen, H., ?Rapid and Robust Algorithms for Detecting Colour Targets?, in Proc. 10th Congress of the International Colour Association (AIC Colour 05), 2005, pp. 959-62.\par \par }