Method and system for denoising dynamic ray-traced scenes using temporal integration

By combining fast history buffer and spatial filtering technology, the time lag and ghosting problems caused by time accumulation in dynamic scenes are solved, and efficient image denoising and clarity improvement are achieved.

CN114331861BActive Publication Date: 2025-09-19NVIDIA CORP
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Patent Information

Application Number
CN202110905815.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2020-10-09
Filing Date
2021-08-06
Publication Date
2025-09-19
Estimated Expiration
2041-08-06

AI Technical Summary

Technical Problem

When existing technologies use time accumulation denoising in dynamic scenes, it is easy to cause time lag and ghosting, and increase computational complexity and resource requirements.

Method used

A method combining a fast history buffer and a complete history buffer is adopted to perform clamping processing through fast history frames, combined with image reconstruction module and spatial filtering technology to reduce time lag and improve image quality.

Benefits of technology

It effectively reduces time lag and artifacts in dynamic scenes, improves image clarity and display quality, and reduces computing resource requirements.

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Abstract

The present invention discloses history clamping for denoising dynamic track scenes using temporal accumulation. The method presented herein can reduce the time lag introduced in the generated image sequence that utilizes temporal accumulation to denoise in dynamic scenes. A fast history frame can be generated along with a full history frame generated for denoising, wherein the fast history frame is accumulated using an exponential moving average with significantly higher blending weights. This fast history frame can be used to determine a clamping window that can be used to clamp the corresponding full history value before or after reprojection. The fast history blending weight can be adjusted to control the amount of noise in the image sequence relative to the time lag. In some embodiments, the difference between the fast and full history values ​​can also be used to determine the amount of spatial filtering to be applied.
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Citation Information

Patent Citations

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