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something interesting about color noise reduction 2

edb1

Please take a look at the color transition between the red and the dark olive.
The left one has both luminance and color noise reduction at values indicated; the middle one has the same amount color noise reduction only; the right one has no noise reduction. The other adjustments are the same.
The transition is just so unnatural.



http://peri-archer.spymac.com/Share/untitled1.JPG
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Comments

5 comments

Date Votes
  • Justin221
    You're not alone. Here's an untouched 100% crop of an ISO 800 *.CR2 at the default settings...
    http://img444.imageshack.us/img444/6121/iso800xs8.jpg
    Not impressive.
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  • Keith6
    I've turned color noise reduction off completely (set zero as my default) and turned down luminance noise reduction to almost nothing (maybe no more than 10 for iSO 3200 shots).

    The built-in defaults are way too aggressive for high ISO 1D MkIII files (which don't look that bad to begin with).

    There are other noise reduction apps out there that do a much better job. In the worst cases (under exposed ISO 6400) I just develop with no noise reduction and then process in a different app. I got much better results that way than trying to use the built-in v4 noise reduction.
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  • Robert Fairweather
    I see the same problems - but tell me.... how do you change the default settings?
    The default radius of 0.8 is too large, and I want to also reduce the luminance, colour and threshold settings to zero.
    I can do much better with these using other software.
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  • NN8930012
    [quote="Wilddog66" wrote:
    I see the same problems - but tell me.... how do you change the default settings?

    To the right of the SHARPENING tool, you'll see a little down-arrow. Click on that and you'll see the 'Save as defaults' option.
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  • craig12
    be sure and report these using the support case system - i think it is the only way the engineers will actually see them.

    i too have experienced high ISO chaos with the noise reduction... have reverted to 3.7 for any high iso pictures
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