Quote:
Originally Posted by SteveJP
Hi Rick, Thanks for the tip about the "unlinked" stretch. I hadn't used that before. I tried it on a recent M45 after DBE and didn't see much difference, but maybe the colour cal was ok anyway. I do generally try BackgroundNeutralization after DBE, but often the difference is almost imperceptable - I guess that's not a bad thing. I do use the PhotometricColorCalibration and it is really impressive - seems like cheating however :-)
|
Hi Steve,
Unlinked STF stretch will do a decent job of matching channels even the the background is out of whack but once you've neutralized the background with either DBE or BGN it won't make as much of a difference (and BGN won't make much difference after DBE because removing the gradients does effectively neutralize the background as well.)
I don't consider PCC cheating
The correct ratio between colours isn't fixed and depends on atmospheric conditions, light pollution, etc. so it's best to calculate separately for each data set.
Cheers,
Rick.