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Featured Paper by

Michael Downey, Robert Uebbing, Stephan Gehrke and Ulrich Beisl

Leica XPro 4.0 for processing ADS imagery has introduced new radiometric correction models to reduce image bias created by atmospheric and ground reflections. Most notable is the availability of atmospheric corrections based on the equation of radiative transfer and a correction that deals with bidirectional reflectance effects on the ground (BRDF) based on a modified Walthall model. To obtain best results, it has been proven that land body masks determined by classification of the near infrared and red bands are required for the BRDF correction. The creation of such land masks is automated in the Leica XPro processing chain. The masks are embedded in the image statistics that are utilized by the image viewer and orthorectification process to apply the BRDF model.
Leica Geosystems Inc.

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