The last thing to do before publishing the image is to do a final round of noise reduction. All of the previous image processes might have introduced additional noise into the image, this process will help clear it up. But at this point, the final round of noise reduction will be minimal. In fact, you might not be able to tell the difference unless you zoom in significantly.

Note: The remainder of the adjustments are minimal.


This round of noise reduction uses ACDNR and we want to focus our efforts on small scale noise in lightness and chrominance. ACDNR gets applied to the entire image, no mask applied.

The settings are:

ACDNR - Lightness
ACDNR – Lightness
ACDNR - Chrominance
ACDNR – Chrominance

We leave most of the settings in the default state except that we lower the standard deviation. The Standard deviation defines the size of the noise we want to focus. With these settings, we are going for small-scale noise.

The second parameter is the amount. Any noise reduction we do should be minimal at this stage, so we significantly lower this parameter. This means for lightness, 30% of the noise will come out of the new image 70% from the old. Chrominance is 50/50.

Comparing the results shows a minimal improvement, which is what we need at the final stage of processing.

At this scale, chances are slim you will be unable to see a difference. But if we zoom in, you can just slightly see a smoother background

What’s Next

It is time to celebrate! We have completed the imaging workflow. What’s left is to prepare the image for publishing by resampling, cropping and annotating.