Noisy negative scans and

I’m scanning 35mm negatives then using PhotoAI to remove noise. On about 95% of the scans Topaz does a great job even on scans with high-levels of noise, but every so often I come across a scan that Topaz seems unable to remove noise from even though the noise patterns are much the same as that found on other scans. No amount of changing parameters has any effect at all on these scans.

The scans are large TIFF files, so I can’t attach one, but I’m happy to provide one if you want to take a look and see what’s going one.

Topaz Photo AI [v2.1.1] on Windows 11