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Proceedings Paper

Data fusion of SPOT and Landsat images using additive multiresolution wavelet decomposition
Author(s): Jorge Nunez; Xavier Otazu; Octavi Fors; Ignacio Juvells Prades; Vincenc Pala; Roman Arbiol
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Paper Abstract

In this paper we present the development of a technique, based on multiresolution wavelet decomposition, for the merging and data fusion of a high-resolution panchromatic image and a low- resolution multispectral image. The method presented here consists of adding the wavelet coefficients of the high- resolution image to the multispectral (low-resolution) data. We have studied several possibilities concluding that the method which produces the best results consists in adding the high order coefficients of the wavelet transform of the panchromatic image to the intensity component (defined as L equals R+G+B/3) of the multispectral image. Using this method, the detail information from both images is preserved. The method is capable of enhancing the spatial quality of the multispectral image while preserving its spectral content to a greater extent. The method presented does not modify the total energy of the multispectral image, since the mean value of each of the added wavelet planes is 0. The method is, thus, an improvement on standard Intensity-Hue-Saturation (IHS or LHS) mergers. We used the method to merge SPOT and LANDSAT (TM) images. The technique presented is clearly better than the IHS and LHS mergers in preserving both spectral and spatial information.

Paper Details

Date Published: 4 December 1998
PDF: 12 pages
Proc. SPIE 3500, Image and Signal Processing for Remote Sensing IV, (4 December 1998); doi: 10.1117/12.331865
Show Author Affiliations
Jorge Nunez, Univ. de Barcelona and Observatori Fabra (Spain)
Xavier Otazu, Univ. de Barcelona and Observatori Fabra (Spain)
Octavi Fors, Univ. de Barcelona and Observatori Fabra (Spain)
Ignacio Juvells Prades, Escola Univ. Politecnica de Barcelona (Spain)
Vincenc Pala, Institut Cartografic de Catalunya (Spain)
Roman Arbiol, Institut Cartografic de Catalunya (Spain)

Published in SPIE Proceedings Vol. 3500:
Image and Signal Processing for Remote Sensing IV
Sebastiano Bruno Serpico, Editor(s)

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