On Fri, Jul 22, 2011 at 2:50 PM, Patrick Horgan <phorg...@yahoo.com> wrote:
> In your camera it's able to do a black shot to get the average noise of
> your sensors.  That gives it a HUGE advantage.  It can just subtract
> that from the image.  Some of the sensor wells are always more noisy
> than others.  You can do the same if you know a bit about graphics, take
> a few shots with your lens cap on in raw mode, get them on to your
> computer, make a noise mask with averaged values from each pixel, then
> subtract that from all your raw images.  Surely there's someone's
> software that can do that already given the black images.  Anyone?

Black frame noise reduction only applies to long exposures for
removing hot pixels. It does nothing beneficial to reduce high-ISO

Frank Gore
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