Michele Zanin Stefano Messelodi Carla Maria Modena An efficient vehicle queue detection system based on image processing. 232-237 http://csdl.computer.org/comp/proceedings/iciap/2003/1948/00/19480232abs.htm 2003 conf/iciap/2003 ICIAP db/conf/iciap/iciap2003.html#ZaninMM03