TY - JOUR T1 - Color targets: Fiducials to help visually impaired people find their way by camera phone JF - EURASIP Journal on Image and Video Processing Y1 - 2007 A1 - Coughlan, J. A1 - Roberto Manduchi KW - Blind wayfinding VL - 2007 UR - http://www.hindawi.com/journals/ivp/2007/096357.abs.html ER -