Shift,Rotation and Limited Scale Invariant Pattern Recognition Using Synthetic Discriminant Functions |
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| Authors: | Hon-Fai Yau Yueh Ouyang Sha-Wei Wang |
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| Institution: | (1) Institute of Optical Sciences, National Central University, Chung-Li Taoyuen 325, Taiwan, R.O.C.;(2) Chun Shan Institute of Science and Technology, Taoyuan, Taiwan, R.O.C. |
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| Abstract: | Making use of the idea of synthetic discriminant functions (SDF), a simple way to synthesize a shift, rotation and limited size correlation filter is proposed. The SDF is synthesized by superimposing four 2nd order circular harmonics of a training reference pattern in 4 different sizes. Computer simulation experiments have shown that the filter is indeed shift, full rotation and limited size invariant over a size range from 1 to 1.82. The invariant range can be increased if more training patterns are used. |
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| Keywords: | pattern recognition shift rotation and limited size invariant synthetic discriminant functions circular harmonic function |
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