Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 129-136 |
| Number of pages | 8 |
| Journal | Optics Communications |
| Volume | 173 |
| Issue number | 1-6 |
| DOIs | |
| Publication status | Published - Jan 2000 |
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Experimental implementation of a photorefractive joint transform correlator with circular harmonic filters. / Zhang, Hui; Cartwright, Colin M.; Ding, Mei-Song; Wang, Zhao-Qi; Cook, Nick J.; Gillespie, W. Allan.
In: Optics Communications, Vol. 173, No. 1-6, 01.2000, p. 129-136.Research output: Contribution to journal › Article
TY - JOUR
T1 - Experimental implementation of a photorefractive joint transform correlator with circular harmonic filters
AU - Zhang, Hui
AU - Cartwright, Colin M.
AU - Ding, Mei-Song
AU - Wang, Zhao-Qi
AU - Cook, Nick J.
AU - Gillespie, W. Allan
PY - 2000/1
Y1 - 2000/1
N2 - We present an experimental realization of optical correlation for real-time rotational-invariance pattern recognition by means of a photorefractive joint transform correlator. Single and multiple circular harmonic components have been used to form correlation filters. The correlator operates with a liquid crystal television as the input images and a photorefractive crystal Bi12SiO20 (BSO) as the recording medium. Suitable pre-processing of the references at the object plane makes up for the lack of light transmission. The properties of circular harmonic phase-only filter and circular harmonic matched filter have been compared. Also the noise robustness of these filters has been tested by tracking an object against a non-overlapping noise background. Analysis and experimental results are presented.
AB - We present an experimental realization of optical correlation for real-time rotational-invariance pattern recognition by means of a photorefractive joint transform correlator. Single and multiple circular harmonic components have been used to form correlation filters. The correlator operates with a liquid crystal television as the input images and a photorefractive crystal Bi12SiO20 (BSO) as the recording medium. Suitable pre-processing of the references at the object plane makes up for the lack of light transmission. The properties of circular harmonic phase-only filter and circular harmonic matched filter have been compared. Also the noise robustness of these filters has been tested by tracking an object against a non-overlapping noise background. Analysis and experimental results are presented.
U2 - 10.1016/S0030-4018(99)00598-2
DO - 10.1016/S0030-4018(99)00598-2
M3 - Article
VL - 173
SP - 129
EP - 136
JO - Optics Communications
JF - Optics Communications
SN - 0030-4018
IS - 1-6
ER -