Spectral envelope
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A spectral envelope is a curve in the frequency-amplitude plane, derived from a Fourier magnitude spectrum. It describes one point in time (one window, to be precise).
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In remote sensing using a spectrometer, the spectral envelope of a feature is the boundary of its spectral properties, as defined by the range of brightness levels in each of the spectral bands of interest.
[edit] References
- Swartz, Diemo (1998). "Spectral Envelopes". [1].
- http://www.unesco.org/csi/pub/source/rs15.htm
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