BLE +L*a*b?

[dermot.shane]

the manual points me to looks/none/advanced, and that does reveal L*a*b controls, but unless i select one of the presets the controls will not change anything..  what i really want is to have access to L*a*b without useing a preset

thoughts?

idea's on how to get to L*a*b in BLE?

[Nicolas Hanson]

Welcome Dermot! Maybe @Andy Minuth or @Andreas Brueckl can help you with this one?

[Andy Minuth]

I am not quite sure what you are driving at. But with the 'Colour-Space' operator you can convert the image to 'RLab' which is related to CIE L*a*b*. The channels will be mapped like this:

R -> red-green compononent

G -> luminance component

B -> blue-yellow component

I am using this space sometimes for special treatment. I recommend to convert back to your working space after your RLab operations. 

[dermot.shane]

that's a good idea, will give it a shot today

thanks Andy

[Anthony Raffaele]

I do the same as Andy. I would create a layer and the first operator would be colorspace to rlab and then the last is rlab to working colorspace. Then put your video and film operators in between. This is particularly helpful in trimming illegal or negative values in an aces colorspace.

 

[dermot.shane]

that is excatly what i did, works as expected..

I wanted to test replacating a workflow i use in Resolve, thanks

 

[Thomas Singh]

Hi all! Why do you need access to LAB  for and how do you set it up in DaVinci?

 

[Mark Mulcaster]

On 15/02/2017 at 11:52 AM, Anthony Raffaele said:

I do the same as Andy. I would create a layer and the first operator would be colorspace to rlab and then the last is rlab to working colorspace. Then put your video and film operators in between. This is particularly helpful in trimming illegal or negative values in an aces colorspace.

 

Other than the aforementioned reason, is there any particular reason\benefit for converting to RLAB?

Edited February 17, 2017 by Mark

[Anthony Raffaele]

Obviously you could color in lab color space,  I think it's worth playing around and seeing if you like the feel of the controls. It should feel very different. I personally have tried it and found its use to mainly be in trimming values.

[dermot.shane]

In Resolve is do use L*a*b to grade, i've had enough seat time with client attended sessions to feel comfortable with it, and in Resolve find i can get to a decent base grade quickly withe these tools

I'm not sure the RLAB in Baselight and the L*a*b in Resolve are the same, likely the conversions are not, and the feedback is not quite the same, not better or worse, just seems to be not the same

but i'll need to test properly, or wait for v5 and Basegrade that seemingly takes some cues from L*a*b's non-linear responce that mimic's the way the eye sees colors

 

Edited February 17, 2017 by dermot.shane
spelling errors

[Thomas Singh]

What does the R or CIE stand for?

[Jussi Rovanperä]

CIE is the organization that is behind most of the "modern" color science. Rlab is just baselight's slightly modified version of CIE Lab colorspace.

[Fady melek]

Andy Minuth

 

I can not find LAB color space on my list in baselight 5 , any info ? 

[Andy Minuth]

On 20/01/2018 at 8:58 PM, Fady melek said:

Andy Minuth

 

I can not find LAB color space on my list in baselight 5 , any info ? 

I guess we helped You via support. 

[Fady melek]

Yes it got it thanks Andy

[Mark Mulcaster]

Apologies to be the necroposter and restart this topic but this video gives you an idea of what you can do in LAB.

One thing that ive always wondered and not been able to do is split out the colour channels like he does in Resolve. It was something i was able to do in Mistika but i cant seem to do it on good ole BL.

 

 

[Bob Chorley]

You can use the Colour Matrix operator - add it between a pair of Colour Space operators so your stack looks like this:

[Colour Space (Convert to RLab)]

[Colour Matrix]

[Colour Space (Convert to Working Colour Space)]

Now you can adjust the mix of channels using the Red, Green and Blue output sliders - remember that the RLab channels map as follows:

L - green sliders

a - red sliders

b - blue sliders

You can of course add other operators between the Colour Space convert operators too.

[Alexander Ligai]

On 1/23/2018 at 4:45 PM, Andy Minuth said:

I guess we helped You via support. 

Hello, I have «Baselight for AVID 4.4» and can't find LAB or Rlab in «Colour Space»((((

[Mark Mulcaster]

I think that may have been mentioned else where (infact  i may have asked that too at on point)

but if you hold down shift and the you can' find it in the expanded list then  you'll need to contact Baselight support to request it.