[leinad (Dan)]

Originally Posted by rcheshire

Possibly, pixel rejection during calibration? This might be helpful. Not sure?

http://pixinsight.com/tutorials/master-frames/en.html

AFAIK, that method is only useful for removing unwanted pixels; ie cosmic ray hits, star trails, etc.. though 3 lights and dark/bias calibration are required for a good sigma reject run. It wont help with dust motes.

You can always tidy them up in processing with a heal tool or clone stamp tool in photoshop.