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A series of representative filters are analyzed from the viewpoint of frequency spectrum analysis. The conclusion is that the well-known constant-constraint criterion is ill-posed, and it is impossible to realize distortion-invariant recognition effectively with a single filter under the criterion of constant constraint.
© 1995 Optical Society of America
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Tao ChunKan, "Ill-posed problem of the constant-constraint criterion in optical correlation pattern recognition: errata," J. Opt. Soc. Am. A 13, 1291-1291 (1996)https://opg.optica.org/josaa/abstract.cfm?uri=josaa-13-6-1291
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