Efficient Differentiation of Pixel Reconstruction Filters for Path-Space Differentiable Rendering
DescriptionPixel reconstruction filters play an important role in physics-based rendering and have been thoroughly studied. In physics-based differentiable rendering, however, the proper treatment of pixel reconstruction filters has remained largely under-explored. We present a new technique to efficiently differentiate pixel reconstruction filters based on the path-space formulation. Specifically, we formulate the pixel boundary integral that models discontinuities in pixel filters and introduce new antithetic sampling methods that support differentiable path sampling methods, such as adjoint particle tracing and bidirectional path tracing. We demonstrate both the need and efficacy of antithetic sampling when treating this integral, and we evaluate the effectiveness of our method across several differentiable- and inverse-rendering settings.
Event Type
Technical Communications
Technical Papers
TimeTuesday, 6 December 20223:30pm - 5:00pm KST
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