Banding Reduction
Posted: Tue Jun 14, 2022 1:51 am
I am getting vertical banding at lower ISOs with my DSLR. What would be the best procedure to reduce it, besides increasing ISO next time?
Hi Scott,
1) Try shooting with optimal ISO of Your Cam, ot lowest. The optimal range is where the Cam acts ISO-invariant, meaning the noise results for doubling ISO or cranking up a stop in post are the same. Usually this is between ISO 400 - 1600 for many DSLRs. You can check sites like dxomark. com for a linear 3dB SNR increase/stop response in the noise curve or check the Inofficial manual
2) Use Dithering while capturing - the stacker will then remove most banding /pattern noise with its outlier rejection filter
3) Use proper Darkframe Calibration and also calibrate Your Flats with matching Darkflats.
4) Process in ST8 - In WIPE, use correlation filtering
5) Also in WIPE there are options for artificial DARKS - only use these as a last resort
6) In DENOISE, set Grain size to 1, then adjust WALKING NOISE ANGLE by drawing a line along the streaks, the set WALKING NOISE SIZE until streaks are gone. Finally, Set GRAIN SIZE to remove normal noise
Clear skies,
Jochen