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Shadow Irradiance Computation


Goal

Our principal goal is to improve the theoretical foundations for irradiance computation in the presence of occluding objects. In particular, we are interested in developing closed-form expressions for general irradiance problems.

Approach

Our approach is to use the ideas from multivariate polyhedral spline theory. We formulate the subtractive (shadow) irradiance for an occluded source as the orthogonal shadow of a four-dimensional object endowed with a density function. Stokes' theorem applied twice to the obejct produces an expression for the shadow irradiance.

Participants

Publications


o Michael M. Stark, Elaine Cohen, Tom Lyche, Richard F. Riesenfeld "Computing Exact Shadow Irradiance Using Splines" SIGGRAPH 99 Conference Proceedings. Paper page
o Michael M. Stark, Richard F. Riesenfeld "Exact Radiosity Reconstruction and Shadow Computation Using Vertex Tracing" 11th Eurographics Workshop on Rendering. Paper page


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Last update: September 29, 2000