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ABSTRACT
<p>The Heidelberg ray tracing model, developed especially for visualization of medical images, is based on a global illumination model and contains a number of application-specific assumptions. It simulates the projection of a scene with well-defined lighting. A detailed description of the model follows an overview of existing and competing illumination procedures.</p>
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CITATION

K. Meetz, H. Meinzer, H. J. Baur, U. Engelmann and D. Scheppelmann, "The Heidelberg Ray Tracing Model," in IEEE Computer Graphics and Applications, vol. 11, no. , pp. 34-43, 1991.
doi:10.1109/38.103392
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