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Artificial Flats

Mark Earhard
edited March 7 in PixInsight
Hey there all-

Does anyone have a procedure for creating an artificial flat?  I had to create one years ago when a fellow student at the community college I was attending for fun accused me of changing the focus and ruining his images because his flats no longer worked.  There were a lot of things wrong with that accusation but instead of telling him to get stuffed I did a ton of research and figured out how to make an "Artificial flat".  Basically it was taking his masters and removing all data but the background, and then doing a lot of touch up work and then processing his data.  It worked like a champ, I fixed his data and got "collaboration credit" on the images, but I've lost the information on how to create one, and I know I have bad or non existent flats for some of the terabytes of unprocessed data from the last 20 years that I have.  I was one of those AP folks that focused solely on acquiring data, not on processing it, and as a result I have years of backlog and I'm just now getting into processing because my mount died.  :D

Is there a process described in Adam's videos that illustrates how to create one of these types of "artificial" flats?

Thanks!

(For the record, the reason his flats failed was not because of the focus change, it was minimal, but with the fact that the school's optics were so dirty that the dirt on the objective changed position during the night and none of his flats would work because of that)

Comments

  • BlockHeadBlockHead
    There is a variation I do cover- you can create night sky flats. You can do this manually or if you have enough data- you can combine it all and reject stars and everything giving you a real sky flat.


    This isn't a synthetic flat... but you might be interested in this.

    -the Blockhead
  • Mark Earhard
    Ah sadly I have not purchased that product.  Thanks for the response though.  I'll hit google and see if I can't find the old procedure, or try and find my class project where I'm pretty sure I documented it.
  • BlockHeadBlockHead
    I have changed the permissions to be Fundamentals.
    -the Blockhead
  • Mark Earhard
    Thank you!
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