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Luminosity mask

Feb 2, 2006 5:50 AM

I have PSE3 for Win Xp.

I also have CS in which I have tried this techique for coping with large differences between the exposure values in an image.

This relies on a Luminosity mask.

Can I get this mask in PSE3, I cannot see how, or simultate the techique?
 
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  • Currently Being Moderated
    Feb 2, 2006 7:24 AM   in reply to athegn
    The book, The Hidden Power of Photoshop Elements 3 has several tools
    that might meet your needs. I believe the author sells them separately.
    Do a web search for "Hidden Power". I think the URL is
    hiddenelements.com, but don't quote me on that.

    -Trish
     
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    Feb 2, 2006 1:37 PM   in reply to athegn
    A luminosity mask is just a grayscale version of the layer itself loaded as a selection. Photoshop has a simple key combination to load the luminosity mask. Elements does not. You can, however, get the luminosity mask in Elements with just a bit more work.

    If your layers palette isn't open, open it so you can see what you're doing. Begin by making the layer whose luminosity mask you want to load active. Let's call this the "base" layer to make the discussion easier to follow.

    Create a levels adjustment layer. Don't make any changes to the levels, just click ok. This will create a levels layer immediately above the "base" layer containing a layer mask. Click on the "base" layer in the layers palette to make it the active layer again and then press ctrl-A to select the entire image and then ctrl-C to copy the image.

    Now press and hold the alt key and click on the small white rectangle in the levels adjustment layer in the palette. The image should turn white as you're now editing the mask. Press ctrl-V to paste the image into the mask (you'll get a grayscale image). Press alt and click on the mask rectangle again to end editing the mask.
    Finally, press and hold the ctrl key and click on the levels adjustment layer (PSE4 will need to click on the mask thumbnail) -- This will load the luminosity mask. Leave the selection active.

    You're done with the adjustment layer, you can delete it if desired. But, if you keep it, you can reload the luminosity mask later if need be. You also have the option of saving the selection. Your choice.

    Since you have Photoshop CS, you can easily create an action for Elements to do this and execute it from the effects palette. You'll need to create the action and a thumbnail image. For instructions see http://www.cavesofice.org/~grant/Challenge/Tools/Create.html When recording the action, you can use the standard key combination to load the luminosity mask and it will work when executing the action in Elements later -- you'll have a one step action.

    The action and thumbnail will need to be placed in an appropriate PSE directory. See http://www.cavesofice.org/~grant/Challenge/Tools/HowtTo.html for a description of how to install Grant's tools. You would do basically the same thing for yours. You don't need a separate directory for each tool, if you have Grant's tools, for example, you can install yours in the same directory.

    Barbara Brundage had a good explanation for how to create your own actions for Elements also but I've misplaced the URL.

    Bob
     
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    Feb 2, 2006 1:41 PM   in reply to athegn
    Here you go, Bob:

    http://digitalmedia.oreilly.com/2005/02/23/PSelement3.html
     
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    Feb 2, 2006 6:02 PM   in reply to Barbara B.
    Thanks Barbara,

    That's an excellent write up! I had that bookmarked on my old computer. I
    transferred my bookmarks to the new computer, but some don't seem to have
    survived the journey.

    Bob
     
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    Feb 4, 2006 6:40 PM   in reply to athegn
    Barbara's actions instructions are very good and complementary to a rather more technical piece I did on the same subject...mine has more in the way of troubleshooting, and hopefully it isn't necessary for most cases. however, if you have tried and are having trouble, it might help:

    Actions Whitepaper

    I hope that helps!
     
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