Scene-based method for spatial misregistration detection in hyperspectral imagery
Applied Optics, Vol. 46, Issue 15, pp. 2803-2816 (2007)
http://dx.doi.org/10.1364/AO.46.002803
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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.
© 2007 Optical Society of America
OCIS Codes
(080.1010) Geometric optics : Aberrations (global)
(100.6890) Image processing : Three-dimensional image processing
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(300.6190) Spectroscopy : Spectrometers
ToC Category:
Detectors
History
Original Manuscript: October 6, 2006
Revised Manuscript: December 5, 2006
Manuscript Accepted: January 4, 2007
Published: May 1, 2007
Citation
Francesco Dell'Endice, Jens Nieke, Daniel Schläpfer, and Klaus I. Itten, "Scene-based method for spatial misregistration detection in hyperspectral imagery," Appl. Opt. 46, 2803-2816 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-15-2803
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