1. A method for detecting and tracking a target, comprising: detecting the target using a plurality of feature cues; fusing the plurality of feature cues to form a set of target hypotheses; tracking the target based on the set of target hypotheses and a scene context analysis; and updating the tracking of the target based on a target motion model; wherein the plurality of feature cues is generated by at least a first detector of a first type and a second detector of a second type, wherein the first and second types are different; wherein the first detector is a appearance-based detector and the second detector is a silhouette-based detector; and wherein the tracking is used to compensate for a motion of a radiation source tracked by a radiation imaging device.