DocumentCode
2760394
Title
Scale and illumination-invariant road sign detection
Author
Perez, Elisabet ; Javidi, Bahrain
Author_Institution
Dept. Opt. i Optometria, Univ. Politecnica de Catalunya, Barcelona, Spain
Volume
2
fYear
2000
fDate
2000
Firstpage
748
Abstract
A road sign recognition system that allows detection under a wide range of scale variation is presented. The recognition system is implemented by a nonlinear JTC. Precise index of nonlinearity is chosen to obtain good discrimination capabilities, as well as, illumination-invariance. We compare the performance of two different methods: the use of composite filters, and when a filter bank is used. In particular, we consider Fourier-plane nonlinear filters as composite filters
Keywords
Fourier transform optics; image recognition; nonlinear optics; optical correlation; spatial filters; Fourier-plane nonlinear filter; composite filter; filter bank; illumination invariance; image recognition; joint transform correlator; nonlinearity index; road sign detection; scale invariance; Computed tomography; Filter bank; Layout; Lighting; Nonlinear filters; Nonlinear optics; Optical filters; Optimized production technology; Roads; Target recognition;
fLanguage
English
Publisher
ieee
Conference_Titel
Lasers and Electro-Optics Society 2000 Annual Meeting. LEOS 2000. 13th Annual Meeting. IEEE
Conference_Location
Rio Grande
ISSN
1092-8081
Print_ISBN
0-7803-5947-X
Type
conf
DOI
10.1109/LEOS.2000.894070
Filename
894070
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