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Astrofriend

Random noise from calibration: Dark vs Dithering

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Hallo!

I have written earlier about using dithering technic instead of traditional dark and bias calibration. I have updated my tutorial with a calculation of the noise from Dark/Bias vs Dithering calibration:

http://astrofriend.eu/astronomy/tutorials/tutorial-dithering/tutorial-dithering.html#part06

Of course it's simplified but still show you what to expect, it depend very much on the camera and your site's darkness.

This is a way to reduce the static pattern (column defects, hot pixel etc) in image.

I hope you find it interesting!

/Lars

Edited by Astrofriend
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