Trichromatic Online Matching in Real-time Spatial Crowdsourcing Tianshu Song 1, Yongxin Tong1, Libin Wang1, Jieying She 2, Bin Yao 3, Lei Chen 2, Ke Xu 1 Beihang University The Hong Kong University of Science and Technology 3 Shanghai Jiao Tong University ∞兆京航宜航天大學 香港科技大學 THE HONG KONG UNIVERSITY OF 上文通大 BEIHANG UNIVERSITY SCIENCE AND TECHNOLOGY , SHANCHAI JIAO TONG UNIVERSITYTrichromatic Online Matching in Real-time Spatial Crowdsourcing Tianshu Song 1 , Yongxin Tong 1 , Libin Wang 1 , Jieying She 2 , Bin Yao 3 , Lei Chen 2 , Ke Xu 1 1 Beihang University 2 The Hong Kong University of Science and Technology 3 Shanghai Jiao Tong University