A Novel Optoelectronic System for Distortion-Invariant ATR
Final rept. 2 Jul 1993-2 Jan 1994
PHYSICAL OPTICS CORP TORRANCE CA RESEARCH AND DEVELOPMENT DIV
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The proposed idea is to enhance existing optical correlation based automatic target recognition ATR by introducing scale, translation, and rotation invariance STRI. Previously, STRI was achieved by utilizing a library of matched filters corresponding to various positions of rotation and scale variation. We find that simple preprocessing can eliminate the need for the library since any STR changes in the input image can be nullified by bringing an input image to what we call its archetype. Physical Optics Corporations POCs new approach includes a segmentation preprocessor required to select any potential object of interest in an image of a realistic scene, POCs invariant preprocessor, and a standard optical correlator. This combination will greatly increase recognition speed and will simplify the recognition training procedure since only one in-plane position of the target will be needed to provide STRI recognition. The Phase I research described in this report opened a new approach to invariant ATR in which in-phase object position will no longer be of concern and, therefore, the best matched filter can be exploited to attain maximum confidence of identification. This should result in the development of hardware capable of operating in a real-time mode.
- Electrooptical and Optoelectronic Devices
- Optical Detection and Detectors