Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1992),
  • paper CThI36

Real-time color image correlation using a color liquid crystal television and a Fresnel holographic filter

Not Accessible

Your library or personal account may give you access

Abstract

Color image recognition by optical correlation techniques is an attractive topic since most real objects consist of spectral as well as shape information. Previous work on color image correlation has been carried out by Shi,1 Ishii and Murata,2 and Yu and Chao.3 All this work was based on coherent optical processing and therefore suffers from the stringent alignment requirements of the spatial filter. To overcome this difficulty, Mu et al.4 introduced an incoherent technique using a Fresnel holographic filter (FHP) to obtain color image correlation. However, most spatial light modulators have monochrome displays and so cannot be applied to the real-time input of a color image. Recently Yu et al.5 used a color liquid crystal television (LCTV) in a coherent optical correlator, but the spatial phase variations of the LCTV severely disrupted coherent optical processing. In this paper we employ a color LCTV in an incoherent correlator with a multiwavelength FHF to achieve real-time input. It has the advantages of no color crosstalk, much relaxed alignment requirements for the spatial filter, and that the spatial phase variation of the LCTV has no influence at all.

© 1992 Optical Society of America

PDF Article
More Like This
Phase modulation for real-time kinoform generation using a liquid crystal television

Aris Tanone, Zheng Zhang, Chii-Maw Uang, Don A. Gregory, and Francis T.S. Yu
MRR7 OSA Annual Meeting (FIO) 1992

Real-Time Optical Intensity Correlator using Photorefractive BSO and a Liquid Crystal Television

C. Soutar, Z.Q. Wang, C.M. Cartwright, and W.A. Gillespie
TuB3 Photorefractive Materials, Effects, and Devices II (PR) 1991

Polychromatic real-time pattern recognition using a liquid crystal television

Francis T. S. Yu, T. W. Lin, and S. Jutamulia
MJ4 OSA Annual Meeting (FIO) 1986

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved