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To improve the accuracy of camera target tracking, a multi-camera multi-target tracking method based on multi-hypothesis tracking (MHT) framework using hierarchical relation model of trajectory tree is proposed. First of all, the unknown number of trajectories can be found by spatiotemporal correlation between trajectories generated by multiple cameras, and the three-dimensional trajectory of the target can be estimated online by solving the maximum weight clique problem (MWCP) of each frame.doi:10.3778/j.issn.1673-9418.1904011 doaj:cacae0bcf7ab44479278b5a3eca6e67d fatcat:2sxsgawemrefdi4r3ejcmwilqe