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Proceedings Paper

Simplifying BRDF input data for optical signature modeling
Author(s): Tomas Hallberg; Anna Pohl; Jan Fagerström
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Paper Abstract

Scene simulations of optical signature properties using signature codes normally requires input of various parameterized measurement data of surfaces and coatings in order to achieve realistic scene object features. Some of the most important parameters are used in the model of the Bidirectional Reflectance Distribution Function (BRDF) and are normally determined by surface reflectance and scattering measurements. Reflectance measurements of the spectral Directional Hemispherical Reflectance (DHR) at various incident angles can normally be performed in most spectroscopy labs, while measuring the BRDF is more complicated or may not be available at all in many optical labs. We will present a method in order to achieve the necessary BRDF data directly from DHR measurements for modeling software using the Sandford-Robertson BRDF model. The accuracy of the method is tested by modeling a test surface by comparing results from using estimated and measured BRDF data as input to the model. These results show that using this method gives no significant loss in modeling accuracy.

Paper Details

Date Published: 2 May 2017
PDF: 10 pages
Proc. SPIE 10206, Disruptive Technologies in Sensors and Sensor Systems, 102060V (2 May 2017); doi: 10.1117/12.2262115
Show Author Affiliations
Tomas Hallberg, FOI-Swedish Defence Research Agency (Sweden)
Anna Pohl, FOI-Swedish Defence Research Agency (Sweden)
Jan Fagerström, Saab Dynamics AB (Sweden)

Published in SPIE Proceedings Vol. 10206:
Disruptive Technologies in Sensors and Sensor Systems
Russell D. Hall; Misty Blowers; Jonathan Williams, Editor(s)

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