Abstract

This paper introduces a new light scattering model for surfaces with rough boundaries and absorption. This is an extension to Ragheb-Hancock model. The new model adds an absorption term proportional of the squared cosine of the light incidence angle, and satisfies conservation of energy. To test the accuracy of the model, we have used the CUReT database. The model was compared with alternatives such as the Jensen model, the Oren-Nayar model, and the original Ragheb-Hancock model. The results show that the new model produces the best fits to the data. Interestingly the model is capable of predicting absorption in dominant colored samples, a feature not possible with the original models studied. The absorption parameter of the new model provides is also informative of surface structure and composition, especially for layered dielectric materials.

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