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Scene-based method for spatial misregistration detection in hyperspectral imagery


Dell'Endice, F; Nieke, J; Schläpfer, D; Itten, K I (2007). Scene-based method for spatial misregistration detection in hyperspectral imagery. Applied Optics, 46(15):2803-2816.

Abstract

Hyperspectral imaging (HSI) sensors suffer from spatial misregistration, an artifact that prevents the accurate acquisition of the spectra. Physical considerations let us assume that the influence of the spatial misregistration on the acquired data depends both on the wavelength and on the across-track position. A scene-based method, based on edge detection, is therefore proposed. Such a procedure measures the variation on the spatial location of an edge between its various monochromatic projections, giving an estimation for spatial misregistration, and also allowing identification of misalignments. The method has been applied to several hyperspectral sensors, either prism, or grating-based designs. The results confirm the dependence assumptions on λ and Θ, spectral wavelength and across-track pixel, respectively. Suggestions are also given to correct for spatial misregistration.

Abstract

Hyperspectral imaging (HSI) sensors suffer from spatial misregistration, an artifact that prevents the accurate acquisition of the spectra. Physical considerations let us assume that the influence of the spatial misregistration on the acquired data depends both on the wavelength and on the across-track position. A scene-based method, based on edge detection, is therefore proposed. Such a procedure measures the variation on the spatial location of an edge between its various monochromatic projections, giving an estimation for spatial misregistration, and also allowing identification of misalignments. The method has been applied to several hyperspectral sensors, either prism, or grating-based designs. The results confirm the dependence assumptions on λ and Θ, spectral wavelength and across-track pixel, respectively. Suggestions are also given to correct for spatial misregistration.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Geography
Dewey Decimal Classification:910 Geography & travel
Language:English
Date:2007
Deposited On:20 Jul 2012 23:15
Last Modified:18 Feb 2018 13:04
Publisher:Optical Society of America (OSA)
ISSN:1559-128X
OA Status:Green
Publisher DOI:https://doi.org/10.1364/AO.46.002803

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