Journal
APPLIED AND COMPUTATIONAL HARMONIC ANALYSIS
Volume 24, Issue 2, Pages 251-267Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.acha.2007.03.006
Keywords
hierarchical Bayesian modeling; variational distribution approximation; super resolution image reconstruction; pansharpening; multispectral images
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In this paper we present a super resolution Bayesian methodology for pansharpening of multispectral images. By following the hierarchical Bayesian framework, and by applying variational methods to approximate probability distributions this methodology is able to: (a) incorporate prior knowledge on the expected characteristics of the multispectral images, (b) use the sensor characteristics to model the observation process of both panchromatic and multispectral images, (c) include information on the unknown parameters in the model in the form of hyperprior distributions, and (d) estimate the parameters of the hyperprior distributions on the unknown parameters together with the unknown parameters, and the high resolution multispectral image. Using real data, the pansharpened multispectral images are compared with the images obtained by other pansharpening methods and their quality is assessed both qualitatively and quantitatively. (c) 2007 Elsevier Inc. All rights reserved.
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