Digital BW, The Print

I little bit off topic, but it sure would be like removing a pebble from my 
shoe if I could find this answer. I can load the image's luminousity by 
Ctrl(PC) or Command(Mac) clicking on the composite channel. I also used to   be able 
to   load the image's Luminousity with the keyboard shortcuts of: Ctrl/Alt/~ 
(PC) or Command/Option/~ (Mac). These shortcuts don't seem to work anymore on 
Phortoshop CS2. I have Photoshop CS on a PC machine and the shortcut: 
Ctrl/Alt/~ works fine. I just can't get it to work on CS2 on either PC or Mac. Does 
anybody know the keyboard shorcut to load the image's Luminousity in Photoshop 
CS2?
Steve 


[Non-text portions of this message have been removed]

I will reveal my ignorance and ask just what 'Luminosity' is in
Photoshop?
 Regards
  Ginny

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, sburger104@... wrote:
>
> I little bit off topic, but it sure would be like removing a pebble
from my 
> shoe if I could find this answer. I can load the image's luminousity by 
> Ctrl(PC) or Command(Mac) clicking on the composite channel. I also
used to   be able 
> to   load the image's Luminousity with the keyboard shortcuts of:
Ctrl/Alt/~ 
> (PC) or Command/Option/~ (Mac). These shortcuts don't seem to work
anymore on 
> Phortoshop CS2. I have Photoshop CS on a PC machine and the shortcut: 
> Ctrl/Alt/~ works fine. I just can't get it to work on CS2 on either
PC or Mac. Does 
> anybody know the keyboard shorcut to load the image's Luminousity in
Photoshop 

> CS2?
> Steve 
> 
> 
> [Non-text portions of this message have been removed]
>

Ginny,

Luminance is the tonal value only (or brightness range of the image) 
without the color component.  So, for example, in Photoshop, you could 
duplicate a layer, set that upper layer to a luminance blending mode, 
then play with curves on that layer.  This would change the brightness 
and contrast without affecting the color.  

This is pretty much the same as working on the L* channel in Lab color 
space, where L* defines the tonality of the image, and the a* and b* 
channels contain the color.

Lou

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "ginnylady33" 
<ginnylady33@...> wrote:

>
> 
>   I will reveal my ignorance and ask just what 'Luminosity' is in
> Photoshop?
>  Regards
>   Ginny