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Denoise

Node icon
Filter

Reduces image noise while preserving edges and detail using Non-Local Means denoising.

The Denoise node applied to a source image: original (left) and result (right).
Side-by-side comparison: the original image on the left and the same image after the Denoise node on the right.

Unlike a blur, Non-Local Means compares small patches across the image to tell noise from real detail, so it smooths noisy areas while keeping edges sharp. Luminance noise (Strength) and color speckles (Color Strength) are controlled separately.

Texture sets

Section titled “Texture sets”

Denoise takes a texture set or a library: every map is denoised with the same settings, the Normal stays a unit direction, and the Opacity is left untouched.

Parameters

Section titled “Parameters”

Pins

ImagePixels or Texture
InputRequired
MaskMask
InputOptional
ImagePixels or Texture
Output

Filter

StrengthNumber
Default: 10.0 Range: 1.0–30.0

Luminance denoising strength. Higher = more noise removed, but may lose fine detail

Color StrengthNumber
Default: 10.0 Range: 1.0–30.0

Color component denoising strength. Higher reduces color noise (chroma speckles) more aggressively

Template Size (px)Integer
Default: 7 Range: 3–21

Size of the patch used for comparison. Larger is smoother but slower. Must be odd (auto-corrected)

Search Size (px)Integer
Default: 21 Range: 7–81

Size of the area searched for similar patches. Larger = better quality, much slower. Reduce for faster processing on large images. Must be odd (auto-corrected)

Mask

Mask FromChoice
Default: Luminance
Color image connected to the mask input

How the connected color image is read as a mask

  • LuminanceRead the image's brightness as the mask. The default.
  • AlphaRead the image's transparency as the mask.
  • RedUse the red channel as the mask.
  • GreenUse the green channel as the mask.
  • BlueUse the blue channel as the mask.
Mask FitChoice
Default: None (native size)
Mask connected

How the mask is sized when it doesn't match the image

  • None (native size)Center the mask at its native size, with no resizing. Unmasked regions are unaffected.
  • StretchStretch the mask to exactly match the image dimensions. May distort the mask shape.
  • Fit (letterbox)Scale the mask to fit inside the image, preserving aspect ratio. Letterboxes where needed.
  • Fill (crop)Scale the mask to fill the image, preserving aspect ratio. Crops edges if aspect ratios differ.

Usage Tips

Section titled “Usage Tips”
  • Start at the default Strength of 10 and raise it for noisier images.
  • If a large image processes slowly, lower Search Size first; it costs the most time.
  • Connect a mask to denoise only the noisy areas and leave detail elsewhere untouched.
Section titled “Related Nodes”