This paper presents a novel image fusion method, suitable for pan-sharpening of multispectral (MS) bands, based on multiresolution analysis (MRA). The low-resolution MS bands are sharpened by injecting highpass directional details extracted from the high-resolution panchromatic (Pan) image by means of the curvelet transform, which is a nonseparable MRA, whose basis function are directional edges with progressively increasing resolution. The advantage with respect to conventional separable MRA, either decimated or not, is twofold: directional detail coefficients matching image edges may be preliminarily soft-thresholded to achieve denoising better than in the separable wavelet domain; modeling of the relationships between high-resolution detail coefficients of MS bands and of the Pan image is more fitting, being carried out in a directional wavelet domain. Experiments carried out on a very-high resolution MS + Pan QuickBird image show that the proposed curvelet method quantitatively outperforms state-of-the art image fusion methods, in terms of geometric, radiometric, and spectral fidelity.
Scheda prodotto non validato
Scheda prodotto in fase di analisi da parte dello staff di validazione
|Titolo:||Multiresolution fusion of multispectral and panchromatic images through the curvelet transform|
|Citazione:||Garzelli, A., Nencini, F., Alparone, L., & Baronti, S. (2005). Multiresolution fusion of multispectral and panchromatic images through the curvelet transform. In Proc. IEEE IGARSS'05 (pp.2838-2841). New York, USA : IEEE.|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|
File in questo prodotto: