---
title: "Noise Reduction"
url: https://postproduction.studio/en/glossary/noise-reduction
language: en
description: "Noise reduction in post-production refers to algorithms that suppress unwanted random variations in pixel values — typically caused by high ISO sensor n..."
updated: 2026-10-25
---

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# Noise Reduction

Noise reduction in post-production refers to algorithms that suppress unwanted random variations in pixel values — typically caused by high ISO sensor noise, low-light capture or aggressive grain in film scans — while preserving genuine image detail. Two main approaches: spatial noise reduction analyzes each frame independently looking for non-random patterns (edges, textures) vs. random variation (noise) and smoothing only the latter; temporal noise reduction compares pixels across multiple consecutive frames, recognizing that static or slowly-changing areas should have the same value frame-to-frame and averaging out the variations that don't fit. Modern tools combine both with motion compensation: motion vectors track moving objects so the temporal averaging follows them rather than smearing. Leading tools include Neat Video (cross-platform plugin), DaVinci Resolve Noise Reduction (spatial + temporal, GPU-accelerated, included in Studio version), Topaz Video AI (AI-driven enhancement and denoise), Foundry's Furnace toolset for Nuke, and Cortex Enterprise. Noise reduction is destructive to detail: aggressive settings smooth out skin texture, soften eyes, eliminate film grain, and produce a synthetic 'waxy' look that is hard to undo. Best practice is to apply minimally and selectively — often with power windows or masks isolating the noisy areas (skin, shadows) and leaving the rest untouched. For HDR content, where noise in shadows becomes more visible, noise reduction is increasingly important and is often performed at the grading stage. Reference: documentation for Neat Video, DaVinci Resolve Noise Reduction and the Foundry Furnace plugins.

Image, SoundColorist, Sound Editor, Online EditorColor Grading, Sound Editing, Finishing

## Related terms

[Color Correction](https://postproduction.studio/en/glossary/color-correction)[Dialogue Editing](https://postproduction.studio/en/glossary/dialogue-editing)[Online Editing](https://postproduction.studio/en/glossary/online-editing)

The three essential scopes used by colorists to verify image legality and balance.