Noise node


This documentation is for version 2.0 of Noise (net.sf.cimg.CImgNoise).


Add random noise to input stream.

Uses the ‘noise’ function from the CImg library, modified so that noise is reproductible at each render.

CImg is a free, open-source library distributed under the CeCILL-C (close to the GNU LGPL) or CeCILL (compatible with the GNU GPL) licenses. It can be used in commercial applications (see


Input Description Optional
Source   Yes
Mask   Yes


Parameter / script name Type Default Function
Sigma / sigma Double 0.01 Amplitude of the random additive noise.
Type / type Choice Gaussian
Type of additive noise.
Gaussian (gaussian): Gaussian noise.
Uniform (uniform): Uniform noise.
Salt & Pepper (saltnpepper): Salt & pepper noise.
Poisson (poisson): Poisson noise. Image is divided by Sigma before computing noise, then remultiplied by Sigma.
Rice (rice): Rician noise.
Seed / seed Integer 2000 Random seed: change this if you want different instances to have different noise.
Static Seed / staticSeed Boolean Off When enabled, the dither pattern remains the same for every frame producing a constant noise effect.
(Un)premult / premult Boolean Off Divide the image by the alpha channel before processing, and re-multiply it afterwards. Use if the input images are premultiplied.
Invert Mask / maskInvert Boolean Off When checked, the effect is fully applied where the mask is 0.
Mix / mix Double 1 Mix factor between the original and the transformed image.