is there any expierence on using hdrgen & falsecolor on nightviews?
The luminance amplitudes of the interesting scene are very low < 1cd/m². And the few sources are very small. I´m running into noise issues, where my proposed metrics are not working: L_min/L_max < threshold, L_min/L_avg < threshold, gradients < thresholds, - not very clear yet.
Camera settings on Nikon D5200 (mirror reflex camera, 18-55 mm, 1:3,5-5,6):
ISO 100, Aperture-priority-automatic-mode, autobracketing
hdrgen64bit -o testimg.hdr - r cam.rsp DSC-?.jpg
falsecolor -i testimg.hdr -e -s a -log 2 -l cdm2 > test-false.hdr
Is there any hidden trick to eliminate noise at low luminance levels OR is my approach nonsense at all? - Our common work on Daylight is not aiming at night-artificial light-scenes. Sorry for abusing our fantastic tools.
Bumping up the ISO is one approach, clear. Changing camera another one?
Thank you and best regards