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On-axis joint transform correlation based on a four-level power spectrum Labastida i Juan, Ignasi, 1970- Carnicer González, Arturo Martín Badosa, Estela Juvells Prades, Ignacio Vallmitjana i Rico, Santiago Òptica de Fourier Reconeixement òptic de formes Dispositius optoelectrònics Cristalls líquids Fourier optics Optical pattern recognition Optoelectronic devices Liquid crystals We propose a method to obtain a single centered correlation with use of a joint transform correlator. We analyze the required setup to carry out the whole process optically, and we also present experimental results. 2012-02-17T08:13:56Z 2012-02-17T08:13:56Z 1999-04-10 2012-02-15T11:34:35Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 0003-6935 https://hdl.handle.net/2445/22122 152359 eng Reproducció del document publicat a: http://dx.doi.org/10.1364/AO.38.006111 Applied Optics, 1999, vol. 38, núm. 29, p. 6111-6115 http://dx.doi.org/10.1364/AO.38.006111 (c) Optical Society of America, 1999 info:eu-repo/semantics/openAccess 5 p. application/pdf Optical Society of America Articles publicats en revistes (Física Aplicada)