Composite versus multichannel binary phase-only filtering

J. L. de Bougrenet de la Tocnaye, E. Quemener, Yvan Petillot

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Multichannel filtering and its inherent capacity for the implementation of data-fusion algorithms for high-level image processing, as well as composite filtering and its capacity for distortion-invariant pattern-recognition tasks, are discussed and compared. Both approaches are assessed by use of binary phase-only filters to simplify implementation issues. We discuss similarities and differences of these two solutions and demonstrate that they can be merged efficiently, giving rise to a new category of filters that we call composite-multichannel filters. We illustrate this comparison and the new filter design for the case of rotation-invariant fingerprint recognition. In particular, we show that the gain in terms of encoding capacity in the case of the composite-multichannel approach can be used efficiently to introduce multichannel-filter reconfigurability.
Original languageEnglish
Pages (from-to)6646-6653
Number of pages8
JournalApplied Optics
Issue number26
Publication statusPublished - 10 Sept 1997


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