2 May 2017 Simplifying BRDF input data for optical signature modeling
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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.
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Tomas Hallberg, Tomas Hallberg, Anna Pohl, Anna Pohl, Jan Fagerström, Jan Fagerström, } "Simplifying BRDF input data for optical signature modeling", Proc. SPIE 10206, Disruptive Technologies in Sensors and Sensor Systems, 102060V (2 May 2017); doi: 10.1117/12.2262115; https://doi.org/10.1117/12.2262115
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