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12. A New Technique For Pattern Recognition Using VFHF In White-Light Lensless Optical System

Author

Wang Xuming, Wang Kemei, Mu Guo-Guang, and Wang Zhao-Qi

Subjects
Engineering, business.industry, Optical engineering, Phase (waves), Holography, Pattern recognition, law.invention, Wavelength, Transformation (function), Optics, law, Filter (video), Pattern recognition (psychology), Computer vision, Artificial intelligence, business, Rotation (mathematics)
Abstract

The advance in pattern recognition is achieved by the uses of Fresnel holographic filter (FHF) and extended source in a lensless correlator 1). This technique gains several advantages such as little effects of a displacement error in the alignment of the FRP and nonsensitivity to changes in scale and rotation of the detected object. In this paper, we present an improved technique by which the optical pattern recognition can be performed with white-light source and a volume Fresnel holographic filter (VFHF) in a lensless intensity correlator. The VFHF serves three functions: phase transformation, reconstructed wavelength selection as well as spatial filtering.© (1987) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Published
1987

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