7 May 2007 Spatial misregistration detection for hyperspectral sensor using in-flight data
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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 edge detection method is therefore proposed. Such a procedure measures the variation on the spatial location of an edge between its various monochromatic projections, giving estimation for spatial misregistration, and allowing also misalignments identification. The method has been applied to several hyperspectral sensors, either prism, or grating-based designs. Results confirm the dependence assumptions on &lgr; and &thgr;, spectral wavelength and across track pixel respectively. In order to correct for spatial misregistration suggestions are also given.
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F. Dell'Endice, J. Nieke, D. Schläpfer, K. I. Itten, "Spatial misregistration detection for hyperspectral sensor using in-flight data", Proc. SPIE 6565, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XIII, 65651F (7 May 2007); doi: 10.1117/12.718591; https://doi.org/10.1117/12.718591
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KEYWORDS
Sensors

Signal to noise ratio

Short wave infrared radiation

Prisms

Charge-coupled devices

Distortion

Spectroscopy

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