Theoretical aspects of vertically invariant gray-levelmorphological operators and their application on adaptive signal andimage filtering

Authors:
Chu-Song Chen;Ja-Ling Wu;Yi-Ping Hung
Affiliations:
Inst. of Inf. Sci., Acad. Sinica, Taipei;-;-
Venue:
IEEE Transactions on Signal Processing
Year:
1999

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Abstract

We use vertically invariant morphological filters for time-varying or adaptive signal processing. The morphological filters adopted in this paper are vertically invariant openings and closings. Vertically invariant openings and closings have intuitive geometric interpretations and can provide different filtering scales with respect to different spatial positions. Hence, they are suitable for adaptive signal filtering. To adaptively assign structuring elements of the vertically invariant openings or closings, we develop the progressive umbra-filling (PUF) procedure. Experimental results have shown that our approach can successfully eliminate noise without oversmoothing the important features of a signal