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5 August 2004 Reflection properties of vegetation and soil with a new BRDF database
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At least in the visible and near infrared spectral region the basic principles about the bi-directional reflectance distribution function (BRDF) have achieved an advanced state. This basic knowledge has been summarized by international well known scientists and firstly published in a book. A CD-ROM data base is attached to the book. For this paper these data have been used for a very first statistical synopsis. The measurement results of different scientists for similar targets and similar geometric conditions differ partly to a great extent. Hence mean values and variances cannot presently be used to describe the BRDF of different surfaces. The anisotropy factor defined by Sandmeier seems appropriate to be used in some investigations. The data sets are not sufficient for serious statistical analyses. Further measurements are essential to overcome the gap from examples to confidential statistical evaluations. In the last section the measurement methods planned by the University of Stuttgart for a ground measuring device and by target pointing of a small satellite are discussed.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Maria F. von Schoenermark and Hans-Peter L. Roeser "Reflection properties of vegetation and soil with a new BRDF database", Proc. SPIE 5431, Targets and Backgrounds X: Characterization and Representation, (5 August 2004);

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