How to INCREASE digital noise.

As the title suggests I’ve been having a lot of fun taking photos with intentional digital noise, or just not denoising photos. However every tool online only adds film grain, or removes digital noise. What are some processing techniques that might help increase the existing noise of my photo without re-taking it?

the censor module has a noises function and you can uses makes blend modes to refine this

Also you can uses a overlay of some noise.
maybe even take some intentionally high iso dark long exposure dark frames as authentic noises source and overlay them

Where could you find an image of ISO noise?

GIMP has noise filters to yes add noise

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Set you camera to max ISO max Exposure time, smallest Aperature and take picture with the lens covered.

Or search for “dark frame”.

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