Image analysis – Pattern recognition – Template matching
Patent
1995-11-14
1998-05-19
Vu, Kim Yen
Image analysis
Pattern recognition
Template matching
382218, 382219, 359 29, 359 32, 359561, 358480, G06K 976, G03H 116
Patent
active
057546916
ABSTRACT:
A method is provided for normalizing correlation data from a holographic correlator. After a sequence of object image patterns are recorded in an angularly multiplexed hologram, the entire volume hologram contents are read out with a uniform (plane wave) object beam. The plane wave readout produces an array of spots at a correlation plane, with the intensity of each spot representing the strength of the recorded hologram for the corresponding stored image pattern. The spot intensity values are accurately detected and stored as normalization factors. Holographic correlation output array values produced by parallel comparison of an input object pattern with the stored image patterns are then divided by the corresponding normalization factors. The resulting normalized correlation output accurately represents the true degree of correlation between the input object pattern and the stored image patterns by eliminating the uncertainty factor. The method generates accurate correlation values from a volume holographic correlator while maintaining high effective computational rates.
REFERENCES:
patent: 4958376 (1990-09-01), Leib
patent: 5309523 (1994-05-01), Iwaki et al.
patent: 5339305 (1994-08-01), Curtis et al.
patent: 5347375 (1994-09-01), Saito et al.
patent: 5416616 (1995-05-01), Jenkins et al.
patent: 5440669 (1995-08-01), Rakuljic et al.
patent: 5483365 (1996-01-01), Pu et al.
patent: 5606435 (1997-02-01), Kransteuber
patent: 5619596 (1997-04-01), Iwaki et al.
Hong et al., "Volume holographic memory systems: techniques and architectures," Optical Engineering, vol. 34, No. 8, pp. 2193-2203 (Aug. 1995).
Hong et al., "Optical pattern clasifier with Perceptron learning," Applied Optics, vol. 29, No. 20, pp. 3019-3025 (10 Jul. 1990).
Nguyen Madeleine A-V
Rockwell International Corporation
Vu Kim Yen
LandOfFree
Normalization of data from holographic correlators does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Normalization of data from holographic correlators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Normalization of data from holographic correlators will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1861718