1. A method of linking tracks of objects in different fields of view, comprising: detecting a first object in a first field of view and a second object in a second field of view; generating a first track and a second track by tracking the first object in the first field of view and the second object in the second field of view, respectively; accumulating, during the tracking, a plurality of first signatures representing respective appearances of the first object corresponding to different views of the first object in association with the first track and a plurality of second signatures representing respective appearances of the second object corresponding to different views of the second object in association with the second track; determining a first area in the first field of view, based on a portion of the first object in a frame associated with the first track; determining a plurality of second areas corresponding to the first area in the second field of view in a plurality of frames associated with the second track, by comparing a first one of the first signatures of the first track corresponding to the first area with the plurality of second signatures of the second track; comparing the first one of the first signatures corresponding to the first area and a respective one of the second signatures corresponding to the second areas; and linking the first track and the second track, if the first one of the first signatures matches with any of the second signatures corresponding to the second areas as a result of the comparison.