Author Topic: Backyard_EOS & PixInsight preprocessing script "CFA format"  (Read 2364 times)

Offline bjaffa

  • Newcomer
  • Posts: 19
I use Backyard_EOS (Canon DLSR) to capture my RAW (*.cr2) for processing in PixInsight using the preprocessing script.
I get the following Warning when I generate a master dark frame or using a master dark generated from my darks:

[2016-09-11 23:51:51] ** Warning: The file format reports no CFA pattern for the master dark frame, but it is being forced as per process instance parameters.

Does anyone know how to make PixInsight recognize Darks generated from Backyard_EOS or let PixInsight know that these are CFA patterns? Or should I disregard this warning?


Also later on in the preprocessing of FLATS, I see this warning
:
[2016-09-11 23:52:50] Writing output file: C:/Users/Pictures/M33_P4_byd_eos_lib_09092016/INTE_15/calibrated/flat/M31_1J_FLAT_Tv1-30s_100iso_+25c_02934stdev_20160908-03h48m14s250ms_c.xisf
[2016-09-11 23:52:50] Dark scaling factors:
[2016-09-11 23:52:50] k0 = 0.004
[2016-09-11 23:52:50] ** Warning: No correlation between the master dark and target frames (channel 0).
[2016-09-11 23:52:50] Writing image: w=5202 h=3465 n=1 Gray Float32
[2016-09-11 23:52:50] 24 FITS keyword(s) embedded.


It appears that the master dark is not used due to the earlier issue "not recognizing CFA format in my Backyard_EOS darks.

Thank you for any guidance and help.

Brent


Offline Juan Conejero

  • PTeam Member
  • PixInsight Jedi Grand Master
  • ********
  • Posts: 7111
    • http://pixinsight.com/
Re: Backyard_EOS & PixInsight preprocessing script "CFA format"
« Reply #1 on: 2016 September 17 07:27:43 »
Quote
Does anyone know how to make PixInsight recognize Darks generated from Backyard_EOS or let PixInsight know that these are CFA patterns? Or should I disregard this warning?

The FITS standard does not provide any way to recognize CFA patterns. Just ignore the warning.

Quote
It appears that the master dark is not used due to the earlier issue "not recognizing CFA format in my Backyard_EOS darks.

Not at all, since you have forced CFA with the "CFA pattern detection" parameter. The no correlation warning means just what it says: there is no benefit (from a noise evaluation perspective) in subtracting the master dark frame from the frames being calibrated.
Juan Conejero
PixInsight Development Team
http://pixinsight.com/

Offline bjaffa

  • Newcomer
  • Posts: 19
Re: Backyard_EOS & PixInsight preprocessing script "CFA format"
« Reply #2 on: 2016 September 18 08:27:30 »
Thank you so much for the clarification