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luminosity selection shortcut dosent work..

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  #1  
Old 06-25-2006, 03:46 PM
annacarina annacarina is offline
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luminosity selection shortcut dosent work..

hi - jsut want to ask if anyone could tell me what im doing wrong when trying to activate my luminosity selection with my keyboard short cut and nothing happens. The shortcut on pc should be .:ctrl+alt~but no marching ants appears. is there another way to get around it. thanks in advance
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Old 06-25-2006, 06:51 PM
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mistermonday mistermonday is offline
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Annacarina, check to see which layers are active and be sure that you actually have piixels whose values are above the midpoint of the lightness range for that color space. For example, if your RGB image is completely filled with Gray whose value is 120, and you try to select the luminosity, nothing will be selected because the command will only slect pixels which are greater than 128. For LAB the value of the mid point in the L channel is 50.
Regards, Murray
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Old 06-25-2006, 08:02 PM
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Swampy Swampy is offline
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I could tell you how to fix it for a Mac, but not for a PC.

For the Mac there is a known conflict with the System Preferences for the Apple Keyboard shortcuts and changing the Apple default key combination fixes the problem in PS.

I don't know if Win/XP has a place to check the default system keyboard shortcuts. ?
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Old 06-25-2006, 09:50 PM
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DannyRaphael DannyRaphael is offline
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Quote:
Originally Posted by annacarina
hi - jsut want to ask if anyone could tell me what im doing wrong when trying to activate my luminosity selection with my keyboard short cut and nothing happens. The shortcut on pc should be .:ctrl+alt~but no marching ants appears. is there another way to get around it. thanks in advance
re: No marching ants
You're not using a laptop by chance, are you?

In any event, try this...
* Open Channels palette
* Ctrl + click on the RGB composite channel...

That ought to do the functional equivalent.
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  #5  
Old 06-25-2006, 10:28 PM
Xaran Xaran is offline
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If you are using a UK keyboard the key strokes are CTRL- ALT and the key next to the number 1.

Christine
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  #6  
Old 06-26-2006, 02:09 AM
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Krisse Krisse is offline
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Smile

I got it to work by using Shift+opt+Cmd+`. I use to select the highlights like that and I'm not sure is that the same luminosity selection what you mean.
Also clicking Channels RGB image with Cmd key gives the same selection.
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  #7  
Old 06-26-2006, 04:21 AM
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Flora Flora is offline
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Hi,

Annacarina,

welcome to RP!

Since you pressed the ~ key, I'am assuming you are working on a US Keyboard ... You could try to go to the Channels and Ctrl+Click on the top one, the composite RGB ..

Krisse,

you are obviously working on a Mac so it was just a matter of 'translating' the keyboard commands from a PC to a Mac ... as you successfully did!

Christine,

I work with an Italian Keyboard and Ctrl+Alt+1, for me, selects the luminosity of the red channel only!!!

If you want to be sure to select the overall luminosity, you could try the alternative way I suggested to Annacarina.
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Old 06-26-2006, 04:24 AM
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Flora Flora is offline
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OOOOppppsss... I hadn't seen that Danny had already said that!!!
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  #9  
Old 06-26-2006, 05:52 AM
annacarina annacarina is offline
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hi and thanks for all the answers - have to check them out now - and no- didnt know that there was so many different keyboards. I have a danish one i suppose with a æ and a å and ø - heeeey aint that something . thanks very much
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  #10  
Old 06-26-2006, 05:54 AM
annacarina annacarina is offline
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and yes i do use a labtop.
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