TY - JOUR
T1 - Invariant pattern recognition by use of wavelength multiplexing
AU - Zalevsky, Zeev
AU - Mendlovic, David
AU - García, Javier
PY - 1997/2/10
Y1 - 1997/2/10
N2 - Rotation-invariant pattern recognition can be achieved with circular-harmonic decomposition. A common problem with such a filter is that, because it is only a single term out of the circular decomposition, it does not contain much of the reference object′s energy. Thus, the obtained correlation selectivity is low. This problem is solved by use of wavelength multiplexing. First, different harmonic terms are encoded by different wavelengths, and then they all are added incoherently in the output correlation plane. This process leads to rotation-invariant pattern recognition with a higher discrimination ability.
AB - Rotation-invariant pattern recognition can be achieved with circular-harmonic decomposition. A common problem with such a filter is that, because it is only a single term out of the circular decomposition, it does not contain much of the reference object′s energy. Thus, the obtained correlation selectivity is low. This problem is solved by use of wavelength multiplexing. First, different harmonic terms are encoded by different wavelengths, and then they all are added incoherently in the output correlation plane. This process leads to rotation-invariant pattern recognition with a higher discrimination ability.
KW - Correlators
KW - Harmonic decomposition
KW - Invariant pattern recognition
KW - Multichannel systems
KW - Wavelength multiplexing
UR - http://www.scopus.com/inward/record.url?scp=0012250397&partnerID=8YFLogxK
U2 - 10.1364/ao.36.001059
DO - 10.1364/ao.36.001059
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AN - SCOPUS:0012250397
SN - 1559-128X
VL - 36
SP - 1059
EP - 1063
JO - Applied Optics
JF - Applied Optics
IS - 5
ER -