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Colour Noise slider default setting

Catto
Hi folks, apologies if this has been covered before but a search didn't get me anywhere -

The colour noise slider in 3.7 defaults to full on for 1DMkII files, it seems - or perhaps it's driven by ISO speed in the image; in any case I'd like it to default to halfway, ie. 15 instead of 30.

Anywhere I can set this, or define the 'camera default' for a 1DMkII file? I can't find it in the Preferences menu - apart from 'use pre-3.7 Standard Colour Noise Suppression', which greys out the slider.

Thanks,
R
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Comments

11 comments

Date Votes
  • Mitch1
    This is something I asked about on Michael Tapes' forum, but unfortunately the response was that there is currently no way to set the color noise default level.

    Also it seems camera-specific, not ISO sensitive. In the Pro version of 3.7 there is now an undocumented \"camera default\" button below the color noise slider; for my 10D this default seems to be 15. (I'd like to set it lower by half again, to 7 or 8.)

    Hopefully PO will add the default setting functionality in the next release.
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  • hvr_oosterzele
    It depends on the ISO setting. That's easy to check.
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  • Mitch1
    [quote="hvr_oosterzele" wrote:
    It depends on the ISO setting. That's easy to check.



    Mine defaults to 15 whether my images are ISO 100, 800, or in between ...


    [ EDIT: I stand corrected. Don't know what I was doing previously, but the settings do indeed adjust for ISO. On a 10D, ISO 100 gets 15, ISO 400 22, ISO 800 30! All of these are unnecessarily high, in my opinion.]
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  • Mike Bailey
    For me, the default is 22 on a 20D at IS0 400. This is way too high and way too much detail gets lost, for instance shooting a bird will easily plasticize the feathers at this setting unless for every image I move it back to zero.

    There really needs to be a way to set this globally as doing it for every individual image is very unproductive/time-consuming.

    Mike
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  • NN160077UL11
    I agree there should be a configurable default option similar to noise suppression in preferences.
    What you can do as a workaround as a first step in your workflow is to set color noise suppresion to zero, select all images with ctrl-a and then use the apply-to-all function and select only the noise parameters.
    It's not a perfect solution but it's an easy way to set it to zero for all images in a collection so you don't have to do it per image.
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  • Mike Bailey
    Thanks for the tip... that's quicker, but like you say, an option in a settings dialog like for the other noise reduction settings would be best so that default settings can be changed globally, then tweaked by local or individual image settings one at a time.

    It still looks as if the quality of noise reduction in general is getting worse from version to version. Carefully looking at RAW images converted with the \"same\" settings in version 3.7 and 3.6 show that there's slightly more detail with version 3.6. And 3.6 was worse than 3.52, which in turn was worse by far than version 1.31 as for losing detail when noise reduction settings are applied.

    Mike
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  • Anonymous
    In the Preferences, checking the
    Use Pre 3.7 Standard Color Noise Suppression

    will give a default setting to all images. Developers have informed us that new algorithms were established for version 3.7 that reduces color noise significantly.

    In general, the lower the ISO the less color noise and unnecessary to reduce color noise. The Camera Default button sets suppression based on camera make/model and ISO setting.

    MikeBailey, I think the 'plastic' bird feathers would be a result of too much Sharpening rather than color noise suppression. Sharpening makes pixel edges more defined and color noise keeps correct color in the correct pixel, i.e. magenta in an all black fabric, color noise suppression put them to black.

    Good suggestions above, and if you have not already, please use the Help > Technical Feedback... to let developers know what your needs wants and desires.

    Sincerely,
    k c
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  • Mike Bailey
    Keith,

    What I'm referring to isn't a result of sharpening, at least any that I applied, as this reference is to output created with shaprening output not enabled. Perhaps plastic is too inflammatory a word since I'm basically (in the end) seeing less detail. Granted this is a very small loss, but going back through versions, in almost every version, a little more detail gets lost, possibly as greater effort is made to deal with noise.

    This has been exacerbated by the color noise suppression, either set at pre 3.7 standard color noise suppression, at 0 in the focus window or at the default of 22.

    Mike
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  • Jorge1211
    The loss of detail is not caused buy color noise suppression it is caused by overly aggressive luminance noise suppression. But I do agree. The cameras are being noise profiled with less and less finesse. The number one selling point for CO at one time was how much more detail there was and how much less noise than other converters. It was what made me a customer in the first place.
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  • Jorge1211
    I hope they don't go in the direction of RSE. Images processed with RSE look in print like they were hit by sand paper.
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  • Mike Bailey
    Between c1 SE v3.6 and c1 Pro v3.7, there has been a slight color output change, too, using Magne's V2 profiles for the 20D. I hadn't noticed this at first since I was more concerned about detail and noise settings, but today it was quite apparent. Using the same file and the same settings between the two versions, the color is different enough to notice. Trying the generic 20D profiles that came with both versions also verify this, but at any rate it does affect the accuracy of Magne's excellent profiles unfortunately.

    Mike
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