Model-based multispectral sharpening

David Izraelevitz

doi:10.1117/12.179786

8 July 1994 Model-based multispectral sharpening

David Izraelevitz

Proceedings Volume 2231, Algorithms for Multispectral and Hyperspectral Imagery; (1994) https://doi.org/10.1117/12.179786
Event: SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, 1994, Orlando, FL, United States

Abstract

Multispectral image sharpening involves enhancing the spatial characteristics of source multispectral imagery (MSI) acquired at low-resolution using a coregistered reference image acquired at a higher spatial resolution. As analysts become better trained in interpreting MSI and rely on spectral information for interpretation, it will be crucial that the sharpened products preserve the spectral information resident in the source MSI. We present a novel approach to sharpening which is explicitly designed to yield results which are consistent with the spectral information in the source MSI, i.e., when the sharpened MSI is filtered and decimated, the source MSI is reconstructed. Our approach involves developing explicit models that embody the assumed relationships among the source, reference and desired sharpened imagery. A sharpening algorithm is then posed as the solution to a constrained model-fitting problem. In this paper we discuss the general model-based image sharpening approach, and discuss a variety of possible models relating the reference and MSI datasets, and the resulting sharpening algorithms.

Citation Download Citation

David Izraelevitz "Model-based multispectral sharpening", Proc. SPIE 2231, Algorithms for Multispectral and Hyperspectral Imagery, (8 July 1994); https://doi.org/10.1117/12.179786

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KEYWORDS

Multispectral imaging

Image enhancement

Image processing

Error analysis

Image filtering

Linear filtering

Model-based design

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