This work presents a general and formal solution to the problem of fusion of multispectral data with high-resolution panchromatic images. The method relies on the generalised Laplacian pyramid, which is an oversampled structure obtained by subtracting from an image its low-pass version, and selectively performs spatial-frequencics spectrum substitution from an image to another. The novelty of the present work is that a decision based on thresholding the local CC is utilized to check the physical congruence of fusion, while the ratio of local RMSs between the two images provides a space-varying gain factor by which the injected high-pass contribution is equalized. Since the pyramid decomposition is not critically-subsampled, possible impairments in the fused images, due to missing cancellation of aliasing terms, are avoided. Quantitative results are presented and discussed on simulated SPOT 5 data of an urban area (2.5m P, 10m XS) obtained from the MIVIS airborne imaging spectrometer.

Decision-driven pyramid fusion of multispectral and panchromatic images / Aiazzi, B; Baronti, S; Pippi, I; Alparone, L. - STAMPA. - (2003), pp. 273-278. (Intervento presentato al convegno 22nd Symposium of the European-Association-of-Remote-Sensing-Laboratories tenutosi a Prague, Czech Republic nel 4 - 6 June 2002).

Decision-driven pyramid fusion of multispectral and panchromatic images

ALPARONE, LUCIANO
2003

Abstract

This work presents a general and formal solution to the problem of fusion of multispectral data with high-resolution panchromatic images. The method relies on the generalised Laplacian pyramid, which is an oversampled structure obtained by subtracting from an image its low-pass version, and selectively performs spatial-frequencics spectrum substitution from an image to another. The novelty of the present work is that a decision based on thresholding the local CC is utilized to check the physical congruence of fusion, while the ratio of local RMSs between the two images provides a space-varying gain factor by which the injected high-pass contribution is equalized. Since the pyramid decomposition is not critically-subsampled, possible impairments in the fused images, due to missing cancellation of aliasing terms, are avoided. Quantitative results are presented and discussed on simulated SPOT 5 data of an urban area (2.5m P, 10m XS) obtained from the MIVIS airborne imaging spectrometer.
2003
GEOINFORMATION FOR EUROPEAN-WIDE INTEGRATION
22nd Symposium of the European-Association-of-Remote-Sensing-Laboratories
Prague, Czech Republic
4 - 6 June 2002
Aiazzi, B; Baronti, S; Pippi, I; Alparone, L
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1075330
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