TY - JOUR
T1 - Generalized spatial deformation harmonic filter for distortion invariant pattern recognition
AU - Marom, Emanuel
AU - Mendlovic, David
AU - Konforti, Naim
N1 - Funding Information:
This researchw as supportedb y a grant from the Ministry of Scienceand TechnologyI,sraeland the Commission of the European Communities. The authorsa lso thankfullya cknowledgpea rtials upportr eceivedfr om the "Barry ZukermanR esearchF und" establishedb y Symbol TechnologiesI,n c., Bohemia, N.Y.U.S.A.
PY - 1990/9/15
Y1 - 1990/9/15
N2 - Classical correlation schemes, whereby the matched filter consists essentially of the Fourier transform of one harmonic of the stored pattern, are well known. Not always however, is the harmonic decomposition of the object applicable. In some instances a generalized spatial deformation harmonic should be defined, as presented in this paper. The duality between these harmonics and the circular harmonics when angular distortion is first proven, and then the case of tilt direction invariant pattern recognition is investigated. This example is followed by experimental results using computer simulations as well as real optical targets.
AB - Classical correlation schemes, whereby the matched filter consists essentially of the Fourier transform of one harmonic of the stored pattern, are well known. Not always however, is the harmonic decomposition of the object applicable. In some instances a generalized spatial deformation harmonic should be defined, as presented in this paper. The duality between these harmonics and the circular harmonics when angular distortion is first proven, and then the case of tilt direction invariant pattern recognition is investigated. This example is followed by experimental results using computer simulations as well as real optical targets.
UR - http://www.scopus.com/inward/record.url?scp=0025491350&partnerID=8YFLogxK
U2 - 10.1016/0030-4018(90)90339-U
DO - 10.1016/0030-4018(90)90339-U
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AN - SCOPUS:0025491350
SN - 0030-4018
VL - 78
SP - 416
EP - 424
JO - Optics Communications
JF - Optics Communications
IS - 5-6
ER -