“Lessons Learned and Improvements when Building Screen-Space Samplers with Blue-Noise Error Distribution” by Belcour and Heitz

  • ©Laurent Belcour and Eric Heitz

Conference:


Entry Number: 19

Title:

    Lessons Learned and Improvements when Building Screen-Space Samplers with Blue-Noise Error Distribution

Presenter(s):



Abstract:


    Recent work has shown that the error of Monte-Carlo rendering is visually more acceptable when distributed as blue-noise in screen- space. Despite recent efforts, building a screen-space sampler is still an open problem. In this talk, we present the lessons we learned while improving our previous screen-space sampler. Specifically: we advocate for a new criterion to assess the quality of such samplers; we introduce a new screen-space sampler based on rank-1 lattices; we provide a parallel optimization method that is compatible with a GPU implementation and that achieves better quality; we detail the pitfalls of using such samplers in renderers and how to cope with many dimensions; and we provide empirical proofs of the versatility of the optimization process.

References:


    Abdalla GM Ahmed and Peter Wonka. 2020. Screen-space blue-noise diffusion of Monte Carlo sampling error via hierarchical ordering of pixels. ACM Transactions on Graphics (TOG) 39, 6 (2020), 1–15.

    Vassillen Chizhov, Iliyan Georgiev, Karol Myszkowski, and Gurprit Singh. 2020. Perceptual error optimization for Monte Carlo rendering. arXiv preprint arXiv:2012.02344 (2020).

    Iliyan Georgiev and Marcos Fajardo. 2016. Blue-noise dithered sampling. In ACM SIGGRAPH 2016 Talks. ACM, 35.

    Eric Heitz, Laurent Belcour, Victor Ostromoukhov, David Coeurjolly, and Jean-ClaudeIehl. 2019. A low-discrepancy sampler that distributes Monte Carlo errors as a blue noise in screen space. In ACM SIGGRAPH 2019 Talks. 1–2.

    Fred J Hickernell, Peter Kritzer, Frances Y Kuo, and Dirk Nuyens. 2012. Weighted compound integration rules with higher order convergence for all N. Numerical Algorithms 59, 2 (2012), 161–183.


PDF:



ACM Digital Library Publication:



Type: