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selective color noise reduction

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Viewing 9 posts - 1 through 9 (of 9 total)
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  • #1226
    soosh
    Participant

    Hey there.

    One of the things I’ve noticed about my camera is that when I get the exposure a little wrong and try to correct in RAW processing, I get a lot of color noise. This image for instance,

    has a lot more to me magenta/pink/reddish noise than I would like in the sky and the ice, but I can’t figure out the most effective way to get rid of it. Anybody want to take a stab at it or share what they would do? When I try to select the color and then desaturate it, it looks all wonky, and adjustment layers are something that I’m still trying to figure out.

    Thanks!

    #15004
    Elsinore
    Keymaster

    Noise ninja or neatimage? I think one or both of them have free trials and/or free low end version. One of them comes with Bibble and it’s pretty effective (can’t remember which one it is, but i’ve heard good things about both, so there’s that). A lot of the noise reduction stuff can be tailored to the color noise you’re getting.

    #15005
    soosh
    Participant

    I’ll check those out. The built-in reduction in Canon’s DPP and what I can find in PS CS2 are worthless, at least as far as I’ve been able to utilize them.

    #15006
    sleeping
    Participant

    Here’s what NeatImage does with it (the default settings, no tweaking from me at all) I use it quite a bit for high-iso shots

    #15007
    Flavivirus
    Participant

    Noise Ninja, original resolution (resizing downward would give the appearance of more detail, but any noise removal is hard on detail)

    The other strategy I use is to place a noise-reduced image on top of an original, and gradient mask to the area that I see are the worst spots. This keeps detail where its needed, and noise is removed from where it isn’t.

    [url]http:/www.flavivirus.net/fark/noise.jpg[/url]

    #15008
    Flavivirus
    Participant

    dunno why it didn’t like that. i guess you have to copy and paste it? odd.

    #15009
    soosh
    Participant

    dunno why it didn’t like that. i guess you have to copy and paste it? odd.

    I think you need a .htaccess file in the fark directory. I can’t even go there directly.

    #15010
    soosh
    Participant

    Here’s what NeatImage does with it (the default settings, no tweaking from me at all) I use it quite a bit for high-iso shots

    Damn. That’s dramatic. I last tried NeatImage about five years ago and it was nowhere near that good. Thanks!

    #15011
    sleeping
    Participant

    Damn. That’s dramatic. I last tried NeatImage about five years ago and it was nowhere near that good. Thanks!

    It doesn’t work so well for everything, especially if there’s a lot of fine detail you don’t want to lose, but I’ve found it pretty useful.

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