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ACR 6.7 RC1  Sharpening artifacts when capture sharpening 5DM3

Apr 4, 2012 12:43 PM

I seem to be getting sharpening artifacts with ACR 6.7 RC1 at relatively low levels of sharpening with Canon 5DM3 files using the "Details" tab.  For instance even at ISO 200, I see these at levels like 40 -6-25-0.  If I up the masking it does get a little better, but I've never seen this before while using a 40D.  I sharpen at 100% view, but even at 50% this is noticeable.  I'm using CS5 on a Dell Studio desktop running Windows 7 Home Premium.   This is consistent across dozens of images, all of which are properly exposed.  (No exposure/brightening/contrast or clarity,  etc. applied)


Anyone else seeing this?

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    Apr 4, 2012 12:50 PM   in reply to misterrick

    Hard to comment without an image, easy enough to post a 100% crop so we can see your artifacts.


    I'm running 6.7, have not seen any sharpening problems on GH2 or S100 raw files.


    Richard Southworth

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    Apr 4, 2012 7:44 PM   in reply to RASouthworth

    There were “screen door” artifacts with someone else’s 5D.3 images, so it is specific to that newly supported camera.




    It would be nice to see an actual RAW file, via DropBox or YouSendIt.

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    Apr 4, 2012 11:21 PM   in reply to ssprengel

    I rarely use sharpening above 15, even with compact camera ... don't like digital look (and artifacts) on the photo ...

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    Apr 6, 2012 11:09 AM   in reply to Vit Novak

    The so-called "screen door effect" was caused by noise becoming distorted when applying a warp (e.g., lens profile correction).  In that earlier example, a very high sharpening setting with no masking and no noise reduction was applied to a moderate ISO image.



    I suggest applying Luminance noise reduction and using more Masking when applying sharpening. This avoids the pattern entirely.

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