区域 ReSTIR:为实时散焦和抗锯齿进行重采样

IF 7.8 1区 计算机科学 Q1 COMPUTER SCIENCE, SOFTWARE ENGINEERING
Song Zhang, Daqi Lin, M. Kettunen, Cem Yuksel, Chris Wyman
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引用次数: 0

摘要

时空储层重采样(ReSTIR)技术的最新进展是利用邻域样本重用来有效评估路径积分。与光栅化一样,ReSTIR 方法隐含了针孔摄像机的假设,每次只评估通过单个预定子像素位置(如像素中心)到达像素的光线。这就妨碍了在具有高频细节的像素内部和附近进行有效的路径重用。 我们引入了区域 ReSTIR,将 ReSTIR 存储库扩展到同时整合每个像素的 4D 射线空间,包括胶片和镜头上的 2D 区域。我们设计了新颖的子像素跟踪时间重用和移位映射,可最大限度地提高这些区域的重采样质量。这使 ReSTIR 对高频内容更加稳健,让我们能够重视对子像素和镜头坐标的采样,并有效地呈现抗锯齿和景深效果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Area ReSTIR: Resampling for Real-Time Defocus and Antialiasing
Recent advancements in spatiotemporal reservoir resampling (ReSTIR) leverage sample reuse from neighbors to efficiently evaluate the path integral. Like rasterization, ReSTIR methods implicitly assume a pinhole camera and evaluate the light arriving at a pixel through a single predetermined subpixel location at a time (e.g., the pixel center). This prevents efficient path reuse in and near pixels with high-frequency details. We introduce Area ReSTIR , extending ReSTIR reservoirs to also integrate each pixel's 4D ray space, including 2D areas on the film and lens. We design novel subpixel-tracking temporal reuse and shift mappings that maximize resampling quality in such regions. This robustifies ReSTIR against high-frequency content, letting us importance sample subpixel and lens coordinates and efficiently render antialiasing and depth of field.
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来源期刊
ACM Transactions on Graphics
ACM Transactions on Graphics 工程技术-计算机:软件工程
CiteScore
14.30
自引率
25.80%
发文量
193
审稿时长
12 months
期刊介绍: ACM Transactions on Graphics (TOG) is a peer-reviewed scientific journal that aims to disseminate the latest findings of note in the field of computer graphics. It has been published since 1982 by the Association for Computing Machinery. Starting in 2003, all papers accepted for presentation at the annual SIGGRAPH conference are printed in a special summer issue of the journal.
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