公开(公告)号：US11216916B1

公开(公告)日：2022-01-04

申请号：US17067417

申请日：2020-10-09

Applicant: Nvidia Corporation

Inventor： Pawel Kozlowski ,  Tim Cheblokov ,  Alexey Panteleev

IPC: G06T5/00 ,  G06T5/50

Abstract: Approaches presented herein can reduce temporal lag that may be introduced in a generated image sequence that utilizes temporal accumulation for denoising in dynamic scenes. A fast historical frame can be generated along with a full historical frame generated for a denoising process, with the fast historical frame being accumulated using an exponential moving average with a significantly higher blend weight. This fast history frame can be used to determine a clamping window that can be used to clamp a corresponding full historical value before, or after, reprojection. The fast historical blend weight can be adjusted to control the amount of noise versus temporal lag in an image sequence. In some embodiments, differences between fast and full historical values can also be used to determine an amount of spatial filtering to be applied.