Optimum rotation-invariant filter for disjoint-noise scenes

被引：4
|
作者：
Gualdron, O
Arsenault, HH
机构：
[1] Centre d’Optique, Photonique et Laser, Departement de Physique, Université Laval, Ste-Foy, QC
[2] Univeridad Industrial de Santander, Bucamaranga
来源：
APPLIED OPTICS | 1996年 / 35卷 / 14期
关键词：
invariant pattern recognition; filters; correlation;
D O I：
10.1364/AO.35.002507
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We introduce an optimum matched filter for rotation-invariant pattern recognition in scenes with disjoint noise. The optimum filter maximizes the ratio between the correlation-peak intensity and the correlation-output energy; in order to ensure rotation invariance, we assume the filter to take the form of a circular-harmonic function. The performance of this new filter is tested by computer simulations with a variety of natural and artificial backgrounds. The results obtained from these tests show an excellent performance much better than the classical circular-harmonic function (the filter that maximizes the signal-to-noise ratio while maintaining rotation invariance). (C) 1996 Optical Society of America
引用
收藏
页码：2507 / 2513
页数：7
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