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Parametric EOTF - New Examples

 
Author Steve

INF
Male
#1 | Posted: 17 May 2021 09:07 | Edited by: Steve 
A new Parametric EOTF page has been added to the website:

https://www.lightillusion.com/parametric_eotf.html

The example shown provides a small Near Black Lift to a standard Rec709 EOTF.
This would be useful for displays that clip near black.

The new example has been added to the example Parametric Gamma Download, in addition to the more exaggerated Roll-Off example.

Steve
Steve Shaw
Mob Boss at Light Illusion

Author dergeeeht
ZRO
#2 | Posted: 19 May 2021 12:01 
Hi Steve

Thanks for the article. Can you explain what the difference is between ig and og?

Author Light Illusion


Male
#3 | Posted: 19 May 2021 12:18 | Edited by: Light Illusion 
The <ig> and <og> values are input and output values, based on the EOTF in use.
They are defined as the <point> info.
So, for an EOTF of 1.0, <ig>=<og>.
For any different EOTF value, <og> will be the <ig> value, after passing through the defined EOFT.

A Parametric EOFT Calculation modal has been added to the Parametric EOTF page.

Steve

Author dergeeeht
ZRO
#4 | Posted: 19 May 2021 14:38 
Great, thanks Steve. Especially the Parametric EOTF Calculation modal is super helpful, I was already sifting through the net to find the right information on how to compute the appropriate <og> value.

Author Steve

INF
Male
#5 | Posted: 20 May 2021 12:07 | Edited by: Steve 
Yet another new example colour space has been added to the example Parametric Gamma Download.
This example is a pure 2.4 EOTF, but using an underlying Gamma of 1.0, with 33 Parametric Points defined.

Note: as Parametric EOTF values are simply a change to the underlying <gamma> value, if <gamma> is set to 1.0 each Parametric <point> value will be connected linearly.

Steve
Steve Shaw
Mob Boss at Light Illusion

Tips and Tricks Light Illusion Forums / Tips and Tricks /
 Parametric EOTF - New Examples

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