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| p.1 #2 · proper way to process files for web viewing |
I'd expect noise to be minimal by the time the image has been dumbed down to web resolutions. That dumbing down sacrifices far more detail than any reasonable noise reduction will do.
Most people would recommend that the output file be set for sRGB colour space as if that will work perfectly for everyone, but you cannot count on it. Viewers still need profiled monitors to show colours most accurately, and of course they need to be using colour managed software such as Firefox or Safari - not Internet Explorer.
To help those users of Firefox and Safari you should include the sRGB colour space profile in your image files. Likewise, you might even have an Adobe RGB version for viewers who have wide gamut monitors but they are in a minority.