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Correlation postprocessing-based method for the detection of de focused images Carnicer González, Arturo Vallmitjana i Rico, Santiago Juvells Prades, Ignacio Reconeixement òptic de formes Optical pattern recognition We present a method to detect patterns in defocused scenes by means of a joint transform correlator. We describe analytically the correlation plane, and we also introduce an original procedure to recognize the target by postprocessing the correlation plane. The performance of the methodology when the defocused images are corrupted by additive noise is also considered. 2012-04-20T12:34:33Z 2012-04-20T12:34:33Z 1997 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: http://dx.doi.org/10.1364/AO.36.004807 Applied Optics, 1997, vol. 36, núm. 20, p. 4807-4811 http://dx.doi.org/10.1364/AO.36.004807 (c) Optical Society of America, 1997 info:eu-repo/semantics/openAccess Optical Society of America Articles publicats en revistes (Física Aplicada)