1. A method of tracking an object captured by a camera system, comprising: receiving image data representing first and second images acquired by the camera system; detecting a first object captured in the first image and a second object captured in the second image; producing a first signature of the first object and a second signature of the second object, the first signature representing a first set of features of the first object and the second signature representing a second set of features of the second object; producing data derived from the first and second signatures; and analyzing the data with use of a match classifier including a set of match and non-match parameters that populate a feature classification space, and the match classifier including multiple decision steps performed to determine whether the second object is an instance of the first object, each of the multiple decision steps performed by the match classifier analyzing with reference to the set of match and non-match parameters to produce decision results that include accepting the first and second objects as a match or rejecting the first and second objects as a match.