Correct name of L in HSL color model

I encountered HLS = Hue, Lightness, Saturation the first time here:

(1) J.Encarnacao, W.Strasser (diacritical characters simplified*): Computer Graphics, Oldenbourg 1986

(2) Foley, van Dam et al: Computer Graphics, Addison-Wesley 1990..1993

(1) contains an early reference to Wyszecki:

G.Wyszecki: Farbsysteme. Musterschmidt, Göttingen, 1960.

(1) and (2) mention Smith:

A.R.Smith: Color Gamut Transform Pairs, Computer Graphics., 12, 3, Aug.1978

It's safe to say, that L means Lightness. Luminance is a physically measurable quantity.

Lightness is used in HLS in the same sense as in CIELab.

Luminosity is a somewhat vague Photoshop nomenclature.

Using HSL instead of HLS is merely misspelling, quite common though.

[*diacritical characters: ordinary characters with tilde and accents etc.)

Best regards --Gernot Hoffmann

G.Hoffmann wrote:

 

…J.Encarnacao, W.Strasser (diacritical characters simplified*)…

J. Encarnação …   ;-)

HSL color model?  Never heard of it.  Nevertheless, I interpret HSL as Hue - Saturation - Lightness.  Obviously, the "L" can stand for different things depending on the context it is used in ( as you've displayed already in your post ).

And, good luck with checking with any Adobe engineers.

Thanks, station_two, for the completion.

In fact I have already a list of key codes ALT+number for Sonderzeichen

(diacritical characters) here on p.3:

http://docs-hoffmann.de/sp-pron-30032011.pdf

But until today ALT+0227 for ã was missing...

Best regards --Gernot Hoffmann

Mac user here.  No need for Alt+numbers nonsense. 

Very glad to see you here again.

jdanek wrote:

 

And, good luck with checking with any Adobe engineers.

Especially in this particular forum!