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doi:10.22028/D291-26517
Titel: | Highly accurate schemes for PDE-based morphology with general structuring elements |
VerfasserIn: | Breuß, Michael Weickert, Joachim |
Sprache: | Englisch |
Erscheinungsjahr: | 2009 |
DDC-Sachgruppe: | 510 Mathematik |
Dokumenttyp: | Sonstiges |
Abstract: | The two fundamental operations in morphological image processing are dilation and erosion. These processes are defined via structuring elements. It is of practical interest to consider a variety of structuring element shapes. The realisation of dilation/erosion for convex structuring elements by use of partial differential equations (PDEs) allows for digital scalability and subpixel accuracy. However, numerical schemes suffer from blur by dissipative artifacts. In our paper we present a family of so-called flux-corrected transport (FCT) schemes that addresses this problem for arbitrary convex structuring elements. The main characteristics of the FCT-schemes are: (i) They keep edges very sharp during the morphological evolution process, and (ii) they feature a high degree of rotational invariance. We validate the FCT-scheme theoretically by proving consistency and stability. Numerical experiments with diamonds and ellipses as structuring elements show that FCT-schemes are superior to standard schemes in the field of PDE-based morphology. |
Link zu diesem Datensatz: | urn:nbn:de:bsz:291-scidok-47709 hdl:20.500.11880/26573 http://dx.doi.org/10.22028/D291-26517 |
Schriftenreihe: | Preprint / Fachrichtung Mathematik, Universität des Saarlandes |
Band: | 236 |
Datum des Eintrags: | 6-Jun-2013 |
Fakultät: | MI - Fakultät für Mathematik und Informatik |
Fachrichtung: | MI - Mathematik |
Sammlung: | SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
Dateien zu diesem Datensatz:
Datei | Beschreibung | Größe | Format | |
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preprint_236_09.pdf | 246,96 kB | Adobe PDF | Öffnen/Anzeigen |
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