Measuring trajectory

The authors address the task of measuring the trajectory of structure in three-space without prior form recognition. They demonstrate how binocular detectors can be constructed that are tuned to particular interocular velocity combinations. These `trajectory detectors´ respond over a range of disparities (they are not tuned to a particular disparity), and signal the motion of structure in the environment with a particular trajectory in disparity space. The measured trajectory could be used by later processes to segment an image based on coherence in three-dimensional motion of structure, or to quickly determine if the trajectory of an object presents a possible threat to the observer