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USM in CS6 - No effect until image is enlarged?

Aug 7, 2012 3:15 AM

My apologies up-front for this sounding like a real "newbie's" question - and I'm actually not (I won one of the NAPP "Guru Awards" in 2007).

 

One of my online photography students said that she couldn't see any changes in a selective sharpening technique using Unsharp Mask, and it seemed that she had missed a step in the process.

 

But, when I tried it in CS6, using a 16 bit image, I could only see the sharpening affects in the preview window in the USM filter and then in the main image in the UI when the image was enlarged to above 75% or so. If the image is set to view fully in the UI, usually around 26% it looks like the previous version of the image without sharpening changes. I also get the effect of the sharpening increasing as I enlarge the image further and it looks over-sharpened at 300% or more.

 

Can someone advise if this is is to be expected - in particular, do I have to increase the the size of the image in the UI to see any sharpening - or is there a way to see it without enlargement in the UI - perhaps at 8 bit?

 

Thanks for any suggestions.

 

Stephen

575 Views   3 Replies   Latest reply: c.pfaffenbichler, Aug 7, 2012 11:23 PM
 
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  • c.pfaffenbichler
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    1. c.pfaffenbichler,
    Aug 7, 2012 3:45 AM   in reply to Adareimages2
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    Filters and Adjustments are properly judged at View > Actual Pixels.

     

    What settings did you use?

     
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  • Adareimages2
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    2. Adareimages2,
    Aug 7, 2012 12:02 PM   in reply to c.pfaffenbichler
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    Thank you for the reply. Sorry for the delay in getting back to you.

     

    I was using a 2 step sharping processing (employing a layer mask) setting 50% USM and then 120% USM, which I painted in with the layer mask.

     

    But when I could not see a change with the image fully displayed in the UI, I set very high settings to experiment with - up to maximum USM.

     

    Stephen

     
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  • c.pfaffenbichler
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    3. c.pfaffenbichler,
    Aug 7, 2012 11:23 PM   in reply to Adareimages2
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    You don’t mention the Radius and Threshold.

     
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