Automatic BRDF Factorization

A method is presented to automatically generate factored approximations for arbitrary Bi-directional Reflectance Distribution Functions (BRDFs). The method extends previous work in BRDF factorization to include a search over a space of 4D to 2D projections. By using a search over projections, approximation error is improved and the necessity for user intervention is reduced. The user can also have more confidence that the approximation produced is close to optimal. The method improves upon or matches the approximation error of previous work in every case tested.

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