Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 351862
Title A bootstrap procedure to select hyperspectral wavebands related to tannin content
Author(s) Ferwerda, J.G.; Skidmore, A.K.; Stein, A.
Source International Journal of Remote Sensing 27 (2006)7. - ISSN 0143-1161 - p. 1413 - 1424.
Department(s) Wildlife Ecology and Conservation
Mathematical and Statistical Methods - Biometris
Publication type Refereed Article in a scientific journal
Publication year 2006
Keyword(s) band-depth analysis - colophospermum-mopane - mammalian herbivores - statistical-methods - chlorophyll content - canopy scales - leaf - reflectance - nitrogen - leaves
Abstract Detection of hydrocarbons in plants with hyperspectral remote sensing is hampered by overlapping absorption pits, while the `optimal' wavebands for detecting some surface characteristics (e.g. chlorophyll, lignin, tannin) may shift. We combined a phased regression with a bootstrap procedure to find wavebands related to the tannin content of fresh leaves, and compared the bands thus identified with the reflectance spectra of pure quebracho tannin. For both reflectance and derivative spectra, bands were identified that can be linked to known absorption features (1471, 1640, 1710, 2175 nm) or fall within the absorption regions identified from a reflectance curve of pure quebracho tannin. We also confirmed a previously reported link between tannin content and the derivative spectra around 800 nm. The study shows that by combining bootstrapping with phased regression it is possible to determine wavebands of which the reflectance is influenced by tannin
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