Thread: Bias frames..?
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Old 13-08-2008, 06:06 PM
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Peter Ward
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Quote:
Originally Posted by strongmanmike View Post
I have a question regarding Bias frames

Other than to remove any sytematic interference present in a frame what else are they used for exactly and how much difference do they really make to a final image?
Noise??? did I say noise? Aaaaarg ...oh no, it's ok, I said interference, phew.....

MIke
Not sure about FLI cam's Mike, but the pedestal set by...oh say..SBIG... takes the bias pattern into account, hence it is subtracted along with the dark signal during dark frame calibration.

I have used bias calibration with Apogee cameras and found absolutely no differences in bias-dark-flat vs dark-flat calibrated images.
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