Unmixing of Dais 7915 Imaging Spectrometer Data in Highly Vegetated Areas

An intensively used agricultural test site in Switzerland is covered by the DAIS 7915 imaging spectrometer in summer 1997. Three different methods of collecting endmembers for spectral unmixing are selected and compared against each other. The methods include a soil-vegetation-atmosphere-transfer approach (SVAT) based on a leaf optical properties model (PROSPECT) and a canopy model (SAIL), image based endmember selection and in-situ reflectance measurements using a ground spectroradiometer. The presented methods are discussed and verified with an extensive ground truth. A rejection procedure for classification of unmixing results is proposed on the acceptance of constraint spectral unmixing results using the uncertainty, expressed by the RMS, of the endmember selection. Posted at the Zurich Open Repository and Archive, University of Zurich ZORA URL: https://doi.org/10.5167/uzh-98454 Published Version Originally published at: Kneubühler, Mathias; Schaepman, Michael E; Schläpfer, Daniel; Itten, Klaus I (1998). Endmember selection procedures for partial spectral unmixing of DAIS 7915 imaging spectrometer data in highly vegetated Areas. In: 1st International EARSeL Workshop on Imaging Spectroscopy, Zurich, Switzerland, 6 October 1998 8 October 1998, 255-261. ENDMEMBER SELECTION PROCEDURES FOR PARTIAL SPECTRAL UNMIXING OF DAIS 7915 IMAGING SPECTROMETER DATA IN HIGHLY VEGETATED AREAS Mathias Kneubuehler, Michael Schaepman, Daniel Schlaepfer and Klaus Itten Remote Sensing Laboratories Dept. of Geography University of Zurich Winterthurerstrasse 190 CH-8057 Zurich