Nonlinear binary correlations for rotation-invariant pattern recognition using circular harmonic decomposition

2001 ◽  
Author(s):  
Pascuala Garcia-Martinez ◽  
Henri H. Arsenault ◽  
Carlos Ferreira
Keyword(s):  
Pattern Recognition ◽  
Rotation Invariant ◽  
Harmonic Decomposition

scholarly journals Rotation Invariant Parallel Signal Processing Using a Diffractive Phase Element for Image Compression

2022 ◽  
Vol 12 (1) ◽  
pp. 439
Author(s):  
Habib Hamam
Keyword(s):  
Pattern Recognition ◽  
Signal Processing ◽  
Image Data ◽  
Rotation Invariant ◽  
Diffractive Element ◽  
Harmonic Decomposition ◽  
Focus Image ◽  
Diffractive Phase Element ◽  
Parallel Pattern ◽  
Parallel Signal Processing

We propose a new rotation invariant correlator using dimensionality reduction. A diffractive phase element is used to focus image data into a line which serves as input for a conventional correlator. The diffractive element sums information over each radius of the scene image and projects the result onto one point of a line located at a certain distance behind the image. The method is flexible, to a large extent, and might include parallel pattern recognition and classification as well as further geometrical invariance. Although the new technique is inspired from circular harmonic decomposition, it does not suffer from energy loss. A theoretical analysis, as well as examples, are given.

Optical circular sampling system for translation and rotation invariant pattern recognition

1994 ◽  
Vol 110 (5-6) ◽  
pp. 507-513 ◽  
Author(s):  
Daniel Asselin ◽  
Henri-H. Arsenault ◽  
Donald Prévost
Keyword(s):  
Pattern Recognition ◽  
Rotation Invariant ◽  
Sampling System

Properties of the circular harmonic expansion for rotation-invariant pattern recognition

1986 ◽  
Vol 25 (18) ◽  
pp. 3225 ◽  
Author(s):  
Henri H. Arsenault ◽  
Yunlong Sheng
Keyword(s):  
Pattern Recognition ◽  
Rotation Invariant

Nonlinear rotation-invariant pattern recognition by use of the optical morphological correlation

2000 ◽  
Vol 39 (5) ◽  
pp. 776 ◽  
Author(s):  
Pascuala Garcia-Martinez ◽  
Carlos Ferreira ◽  
Javier Garcia ◽  
Henri H. Arsenault
Keyword(s):  
Pattern Recognition ◽  
Rotation Invariant ◽  
Morphological Correlation
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