Abstract

A previous method of obtaining scale-invariance detection with white-light illumination has been improved on. We were able to detect different scaled versions of the target up to a magnification factor equal to 2. We simultaneously detected several versions in the same scene, because each scale factor is codified in a different wavelength. Experimental results demonstrate the proposed technique and show the utility of the method.

© 2000 Optical Society of America

Invariant pattern recognition based on centroids

Shoude Chang, Henri H. Arsenault, Pascuala Garcia-Martinez, and Chander P. Grover
Appl. Opt. 39(35) 6641-6648 (2000)

Shift- and scale-invariant recognition of contour objects with logarithmic radial harmonic filters

Antonio Moya, José J. Esteve-Taboada, Javier García, and Carlos Ferreira
Appl. Opt. 39(29) 5347-5352 (2000)

Shift-and-scale-invariant pattern recognition using an elliptic coordinate-transformed phase-only filter

Javier García, Tomasz Szoplik, and Carlos Ferreira
Appl. Opt. 31(23) 4823-4828 (1992)

Coordinate-transformed filter for shift-invariant and scale-invariant pattern recognition

Dan Cojoc, M. Teresa Molina, Javier García, and Carlos Ferreira
Appl. Opt. 36(20) 4812-4815 (1997)

Scale and projection invariant pattern recognition

David Mendlovic, Naim Konforti, and Emanuel Marom
Appl. Opt. 28(23) 4982-4986 (1989)