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- W3013265033 abstract "Author(s): Kass, Michael; Lefohn, Aaron; Owens, John D. | Abstract: Accurate computation of depth-of-field effects in computer graphics rendering is generally very time consuming, creating a problematic workflow for film authoring. The computation is particularly challenging because it depends on large-scale spatially-varying filtering that must accurately respect complex boundaries. A variety of real-time algorithms have been proposed for games, but the compromises required to achieve the necessary frame rates have made them them unsuitable for film. Here we introduce an approximatedepth-of-field computation that is good enough for film preview, yet can be computed interactively on a GPU. The computation creates depth-of-field blurs by simulating the heat equation for a nonuniform medium. Our alternating direction implicit solution gives rise to separable spatially varying recursive filters that can compute large-kernel convolutions in constant time per pixel while respecting the boundaries between in-focus and out-of-focus objects. Recursive filters have traditionally been viewed as problematic for GPUs, but using the well-established method of cyclic reduction of tridiagonal systems, we are able to vectorize the computation and achieve interactive frame rates." @default.
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- W3013265033 date "2006-01-01" @default.
- W3013265033 modified "2023-09-26" @default.
- W3013265033 title "Interactive Depth of Field Using Simulated Diffusion on a GPU" @default.
- W3013265033 hasPublicationYear "2006" @default.
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