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Using Iterated Rational Filter Banks Within the ARSIS Concept for Producing 10 m Landsat Multispectral Images

P. Blanc, T. Blu, T. Ranchin, L. Wald, R. Aloisi

International Journal of Remote Sensing, vol. 19, no. 12, pp. 2331-2343, August 1998.


The ARSIS concept is designed to increase the spatial resolution of an image without modification of its spectral contents, by merging structures extracted from a higher resolution image of the same scene, but in a different spectral band. It makes use of wavelet transforms and multiresolution analysis. It is currently applied in an operational way with dyadic wavelet transforms that limit the merging of images whose ratio of their resolution is a power of 2. Rational discrete wavelet transforms can be approximated numerically by rational filter banks which would enable a more general merging. Indeed, in theory, the ratio of the resolution of the images to merge is a power of a certain family of rational numbers. The aim of this paper is to examine whether the use of those approximations of rational wavelet transforms are efficient within the ARSIS concept. This work relies on a particular case: the merging of a 10 m SPOT Panchromatic image and a 30 m Landsat Thematic Mapper multispectral image to synthesize 10m multispectral image TM-HR.

@ARTICLE(http://bigwww.epfl.ch/publications/blanc9801.html,
AUTHOR="Blanc, P. and Blu, T. and Ranchin, T. and Wald, L. and
	Aloisi, R.",
TITLE="Using Iterated Rational Filter Banks Within the {ARSIS}
	Concept for Producing 10 {m} {L}andsat Multispectral Images",
JOURNAL="International Journal of Remote Sensing",
YEAR="1998",
volume="19",
number="12",
pages="2331--2343",
month="August",
note="")

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