Moving object trajectory estimation using an optical Fourier processor
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A vision system that estimates the trajectory (velocity and direction) of moving targets in a two-dimensional field at video frame rates has been developed and constructed. The system uses an optical Fourier processor to calculate the frequency domain representation of moving objects from which their trajectory is estimated using conventional electronic processing techniques. In a series of experiments, target velocities were estimated to within 4 percent of their actual value and direction was estimated to within 3 degrees
Lane, P., K. Knudsen, and M. Cada. 1998. "Moving object trajectory estimation using an optical Fourier processor." Proceedings of the SPIE - The International Society for Optical Engineering 1998 International Conference on Applications of Photonic Technology III: Closing the Gap between Theory, Development, and Applications 3491.