Pattern recognition by circularly symmetric filters

Pattern recognition by circularly symmetric filters

Often one is confronted with recognizing objects of given shape but arbitrary orientation. Matched filters then fail to work. To overcome this obstacle circularly symmetric filters have been designed. The basic principle of such orientation independent filters (OIF) can be interpreted as a phase com...

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Veröffentlicht in:Optical and quantum electronics 1984-05, Vol.16 (3), p.189-196
Hauptverfasser: EBERLEIN, D, SCHWERDTNER, A
Format: Artikel
Sprache:eng
Schlagworte:
Exact sciences and technology
Filters, zone plates, and polarizers
Fundamental areas of phenomenology (including applications)
Optical elements, devices, and systems
Optics
Physics
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Zusammenfassung:Often one is confronted with recognizing objects of given shape but arbitrary orientation. Matched filters then fail to work. To overcome this obstacle circularly symmetric filters have been designed. The basic principle of such orientation independent filters (OIF) can be interpreted as a phase compensation filter approach. They turn out to be highly sensitive to any shape variations. These filters are easy to produce for many applications.
ISSN:0306-8919
1572-817X
DOI:10.1007/BF00619373