Author Topic: Image integration  (Read 171 times)

Offline Geoff

  • PixInsight Padawan
  • ****
  • Posts: 902
    • View Profile
Image integration
« on: 2019 October 01 22:50:11 »
This looks like a bug rather than a feature.  If I select "No Rejection" when integrating, ImageIntegration still generates low rejection window.  The latest release has not changed this behaviour.  It would not matter if the low rejection window were empty, but it does show some rejected(?) data.
Don't panic! (Douglas Adams)
Astrobin page at http://www.astrobin.com/users/Geoff/
Webpage (under construction) http://geoffsastro.smugmug.com/

Offline Juan Conejero

  • PTeam Member
  • PixInsight Jedi Grand Master
  • ********
  • Posts: 7089
    • View Profile
    • http://pixinsight.com/
Re: Image integration
« Reply #1 on: 2019 October 02 05:34:13 »
Hi Geoff,

This is normal behavior, not a bug. The selected pixel rejection algorithm has nothing to do with the state of the clip low range and clip high range parameters. In other words, ImageIntegration implements two different types of pixel rejection: statistical rejection (sigma clipping, linear fit clipping, etc) and range rejection. The former uses adaptive methods (with the sole exception of min/max clipping) based on robust statistical analysis, while the latter performs an unconditional rejection of all pixels outside a prescribed range.

If you want to perform no pixel rejection at all, you have to select no rejection for the rejection algorithm parameter and disable the clip low range and clip high range parameters.
Juan Conejero
PixInsight Development Team
http://pixinsight.com/