Linear Fit Clipping

Questions and answers about processing in StarTools and how to accomplish certain tasks.
Post Reply
Scottk
Posts: 5
Joined: Thu Aug 26, 2021 7:18 pm

Linear Fit Clipping

Post by Scottk »

I noticed in the unofficial manual that average or winsorized stacking is recommended. Is linear fit clipping (from PI or Siril) not recommended?
Scott K
User avatar
admin
Site Admin
Posts: 2866
Joined: Thu Dec 02, 2010 10:51 pm
Location: Melbourne
Contact:

Re: Linear Fit Clipping

Post by admin »

Scottk wrote: Mon Sep 13, 2021 6:26 pm I noticed in the unofficial manual that average or winsorized stacking is recommended. Is linear fit clipping (from PI or Siril) not recommended?
Thank you for your question. Linear fit clipping appears to be just another outlier rejection algorithm, and its use should be perfectly fine (provided there are enough frames available to do its job properly - according to the PI documentation, that is 25 frames of or more).

To avoid confusion for anyone seeing this in the future or searching for "linear fit", this is has nothing to do with the "LinearFit" procedure that is part of initial color calibration in PI (e.g. color channel normalization). This procedure should definitely be avoided!

I hope this helps,
Ivo Jager
StarTools creator and astronomy enthusiast
Scottk
Posts: 5
Joined: Thu Aug 26, 2021 7:18 pm

Re: Linear Fit Clipping

Post by Scottk »

It does. Thank you Ivo! :thumbsup:
Scott K
Post Reply