Quote:
Originally Posted by Peter.M
Yes noise reduction is the benefit, the software exploits the fact that signal is not random and noise is. As a simple example think of one pixel that is bright in a picture, if this due to signal then it would be in any subsequent frames and the average of those pixels would be a bright pixel. Think now that the bright pixel was due to noise, it may not be in subsequent frames (because it is random) so a bright pixel will be averaged with other sub frames that are dim, this will result in the pixel looking dimmer. And the more subframes you take that dont contain the bright pixel the dimmer it would look.
Obviously this is very simplistic but it should give you an idea of whats going on.
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Right so noise is the key. But are you saying that the stacking software will do nothing significant if anything at all (with exception of noise removal) with the image data (nebula etc) as far as improving it in these similar images?
Quote:
Originally Posted by MrB
Damn, there is a great website that shows examples of the results of stacking with mouse-over images, but buggered if I can remember it!
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That would be interesting to see Simon.