Hi everyone,
I've found many webpages about the same issue, some older some newer, but I can't find a clear and updated method to fix the purple/green fringe in Raw highlights (and perhaps a little general color cast in MLV files from 5D3).
Up to now I tried 4 methods:
1.
Iliah Borg's method for BMPCC footage is based on RawDigger histogram analysis of the DNG file for finding the closest value to the extreme highlights noise and setting that value as white level of the DNG via Exiftool. But I must say that
this 1st method doesn't work with me;
2.
RawTherapee has a
Defringe tool that sounds promising, but again I must say that
this 2st method doesn't work with me;
3.
Nick Driftwood's Resolve node-based method is artful and
it works, but (quoting an
article by Dave Kendricken)
«Some users, however, felt this workaround was too much of a compromise to be considered a viable alternative to an Adobe Camera RAW workflow. (Even though appending nodes in Resolve makes applying 'de-fringing' corrections to many clips very fast, it isn't really ideal).» The article continues with the good news that Resolve 10 auto-magically fixes the fringe, but it's actually not true for me. Said that, I roughly agree with the fact that this 3rd method is rather old (Davinci 9) and it seems not “ideal”, not pretty clean;
4.
ACR method appears to be that "clean" solution: it's simply based on Remove Chromatic Aberration option (Lens Corrections tab) and
it works BUT only in ACR: importing the fixed ACR-DNGs in Resolve, the fringe is still there! as if the ACR corrections are NOT visible in Resolve (even exporting the original DNGs to new ACR-DNGs).
(Right here a little secondary question: ACR-saved-DNGs' size is about half the size of the original Switch-DNGs, why?)
Now, considering that I need to use Switch (for MLV to DNG conversion) which is the cleanest method that fixes the purple/green fringe AND lets me grade in Resolve?Perhaps setting the white level in Switch? (but Exiftool method didn't give any result...)
Should I use IR filters? (Like BMPCC users...)
Thanks in advance for your kind help.
P.S. Just another couple of secondary questions:
1. In Switch mlv_dump, if you
DON'T select the option (07) disable vertical stripes in highlights, means that Switch
DOES fix the vertical stripes, right?
2. Time ago I had installed an old Switch. Today I installed Exiftool. Then I downloaded the updated Switch for overwriting the old one. Only at this point I read that Switch uses Exiftool, so my question is: could this 2 installations (Switch and Exiftool) be in conflict? Should I uninstall Exiftool?
Again, thanks a lot.
