FIZIKA B 7 (1998) 4, 205-214
MAPPING OF CORRELATION FILTER VALUES OPTIMIZED TO PHASE CONSTRAINED SPATIAL LIGHT MODULATORS
Institute of Physics, Bijenička c. 46, P. O. Box 304, HR-10000 Zagreb, Croatia
Received 23 November 1998; Accepted 8 March 1999
Correlation filters (CFs) are designed for pattern recognition tasks, taking into
account the implementation of possibilities of available spatial light modulators (SLMs).
Commercially available SLMs have the amplitude and phase responses that cannot be
independently controlled. Furthermore, the phase modulation curves of such SLMs generally
cannot cover the desired (0, 2p) interval. Therefore,
previous filter designs include the SLM contraints as starting point for designing the
CFs. Here we start with previously designed and calculated CFs and propose an optimum
mapping of such CF values to the values constrained by the modulation properties of
arbitrary SLM, in order to achieve a maximum intensity of the output correlation peak.
Optimization procedure, achieved by the variation of a phase shift parameter, is discussed
theoretically and numerically.
PACS numbers: 61.30.-v, 42.30.-d, 42.30.Sy
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