29 June 1989 Detection Of Rotational And Scale Varying Objects With A Programmable Joint Transform Correlator
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Proceedings Volume 1053, Optical Pattern Recognition; (1989) https://doi.org/10.1117/12.951528
Event: OE/LASE '89, 1989, Los Angeles, CA, United States
Abstract
The use of joint transform correlators for pattern recognition has the advantages such as low resolution requirement of the spatial light modulators and easy optical implementation. Based on a programmable JTC architecture, we propose two methods to detect objects under rotation or scale change. Rotation invariant pattern recognition can be achieved by writing the real-value circular harmonic expansion of an image function as reference. By using multiple images, each rotated by a certain angle or at different sizes as composite reference in a JTC, objects of different orientations or sizes can be detected.
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Francis T. S. Yu, Francis T. S. Yu, Xiaoyang Li, Xiaoyang Li, Eddy Tam, Eddy Tam, Suganda Jutamulia, Suganda Jutamulia, Don A. Gregory, Don A. Gregory, "Detection Of Rotational And Scale Varying Objects With A Programmable Joint Transform Correlator", Proc. SPIE 1053, Optical Pattern Recognition, (29 June 1989); doi: 10.1117/12.951528; https://doi.org/10.1117/12.951528
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