DaVinci Resolve Forum
Resolve 11 odd LUM qualifier behavior
Resolve 11 odd LUM qualifier behavior
by Michael Wolf on Aug 22, 2014 at 1:57:11 am

Was trying to qualify just the keyboard in this shot...



Tried just manually adjusting the LUM only qualifier to include the bottom 10% of luminance, but I found I had to crank 'Low' all the way up to 50% to begin to get a matte...



Then, curious, I tried to qualify the brights and found I have to crank 'High' down to 75% to start to get a matte...




So now, to put a little science on it, I loaded up a RAMP. Sure enough, the darks don't start to be included in the matte until 'Low' get above 50%, and the brights don't start to be included in the matte until 'High' gets below 75%...



Anyone have any explanation of this behavior?

Michael Wolf
www.mikewolfpost.com


Re: solve 11 odd LUM qualifier behavior
by Toby Tomkins on Aug 22, 2014 at 7:12:01 am

This is indeed terrible. The saturation scale isn't great either.

It would also be nice to be able to set ranges or have a log preset for these ranges.


Re: Resolve 11 odd LUM qualifier behavior
by Juan Salvo on Aug 22, 2014 at 11:25:30 pm

Resolve operates in 32bit float. That means you can have data below black and above white. This is handy for say recovering information lost in highlights or shadows, the qualifiers respond in correspondence with the data resolve is able to differentiate.

http://JuanSalvo.com
http://theColourSpace.com


Re: Resolve 11 odd LUM qualifier behavior
by Michael Wolf on Aug 22, 2014 at 11:35:17 pm

Got it. Would be nice to have an option to have the levels in the qualifiers track more closely with the levels in the actual picture.

Michael Wolf
www.mikewolfpost.com


Re: Resolve 11 odd LUM qualifier behavior
by Sascha Haber on Aug 25, 2014 at 9:40:44 pm

I totally agree

A slice of color...

Resolve 10.1.4 - Smoke 2015
Colorist / VFX / Aerial footage nerd
http://vimeo.com/saschahaber


Re: Resolve 11 odd LUM qualifier behavior
by Michael Wolf on Aug 26, 2014 at 7:10:11 am

It does, however, say '0' at the bottom and '100' at the top, so I expected that to translate to 0% and 100% level as seen on a scope.

Michael Wolf
www.mikewolfpost.com





© CreativeCOW.net