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Proceedings Paper

Median filtering in multispectral filter array demosaicking
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Paper Abstract

Inspired by the concept of the colour filter array (CFA), the research community has shown much interest in adapting the idea of CFA to the multispectral domain, producing multispectral filter arrays (MSFAs). In addition to newly devised methods of MSFA demosaicking, there exists a wide spectrum of methods developed for CFA. Among others, some vector based operations can be adapted naturally for multispectral purposes. In this paper, we focused on studying two vector based median filtering methods in the context of MSFA demosaicking. One solves demosaicking problems by means of vector median filters, and the other applies median filtering to the demosaicked image in spherical space as a subsequent refinement process to reduce artefacts introduced by demosaicking. To evaluate the performance of these measures, a tool kit was constructed with the capability of mosaicking, demosaicking and quality assessment. The experimental results demonstrated that the vector median filtering performed less well for natural images except black and white images, however the refinement step reduced the reproduction error numerically in most cases. This proved the feasibility of extending CFA demosaicking into MSFA domain.

Paper Details

Date Published: 4 February 2013
PDF: 10 pages
Proc. SPIE 8660, Digital Photography IX, 86600E (4 February 2013); doi: 10.1117/12.2005256
Show Author Affiliations
Xingbo Wang, Univ. de Bourgogne (France)
Gjøvik Univ. College (Norway)
Jean-Baptiste Thomas, Univ. de Bourgogne (France)
Jon Yngve Hardeberg, Gjøvik Univ. College (Norway)
Pierre Gouton, Univ. de Bourgogne (France)

Published in SPIE Proceedings Vol. 8660:
Digital Photography IX
Nitin Sampat; Sebastiano Battiato, Editor(s)

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