1. An apparatus comprising: an input port configured to receive first pass image information and second pass image information; a detector module configured to detect a potential target within the first pass image information and the second pass image information, and determine a plurality of features forming a feature set associated with the potential target and a new location of the potential target within the second pass image information, wherein detection is based upon one or more of at least some of the determined features and a location of the potential target within the first pass image information; a detection database configured to store at least a location, features, fused multi-pass features and a classification of the potential target; a comparator module configured to compare the new location of the potential target with contents of the detection database to determine whether the new location of the potential target is within a predetermined range of the location of an element in the detection database; a single-pass classifier module configured to (a) receive the potential target's feature set, if the new location of the potential target is not within said predetermined range of the location of an element in the detection database, (b) classify the potential target according to received potential target's feature set, and (c) transmit the location, the feature set and the classification of the potential target to the detection database; a fused multi-pass feature determiner module configured to determine fused multi-pass features of the potential target by combining and comparing the features sets of the potential target corresponding to the new location of the potential target, if the new location of the potential target is within said predetermined range of the location of an element in the detection database; and a multi-pass classifier module configured to (a) receive the potential target's feature set and said determined fused multi-pass features, if the new location of the potential target is within said predetermined range of the location of an element in the detection database, (b) classify the potential target according to the received potential target's feature set and fused multi-pass features, and (c) transmit the location, the feature set, the fused multi-pass features and the classification of the potential target to the detection database.