| IIRC this is what it means:
It looks for a square of a particular size that is just 'noise' for analysis, it will first try to do it automatically, however you can choose your own square - just click and draw and it will analyse the noise in that section and create its best attempt at the right settings.
If you have a lot of images with a similar distribution of noise find the one with the largest 'blank' area of noise and create a preset using those settings, then in images with no blank areas, load that preset. |