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Image Noise: Examples and Characteristics
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images which are underexposed will have more visible noise-- even if
you brighten them up to a more natural level afterwards. On
the other hand, overexposed images will have less noise and can
actually be advantageous, assuming that you can darken them later
and that no region has become solid white where there should be
texture -
The blue and green channels will usually have the
highest and lowest noise, respectively,
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