Pixinsight v1.8.5 using OSC ZWO ASI1600 Unable to acquire CFA pattern

[bjaffa]

Using Pixinsight 1.8.5 & the batchpreprocessing script  with images acquired with a ZWO ASI1600 camera I get the following error on all images (It did work in version 1.8.4, do I need to set up the fits header?):

Loading target file:
E:/Astro/imageproc/M31_8_31_2017_M/INTE_M/calibrated/light/M31_M3_120sec_1x1__frame11_a_c.xisf
Loading image: w=4656 h=3520 n=1 Gray Float32

*** Error:
*** Error: Unable to acquire CFA pattern information: Unavailable or invalid image properties.

* Applying error policy: Continue on error.

then it eventually will fail with the following error message:
* Applying error policy: Continue on error.
*** Error: No image could be demosaiced.

************************************************************
* End demosaicing of light frames


I worked until I upgraded with Pixinsight 1.8.5  today.  I am not sure if I need to setup
some parameters for the FITS header that ZWO ASI1600 sensors outputs.

Thanks for any guidance

[bvalente]

the 1600 is a mono camera, there is no color filter array (CFA). that is only for one shot color cameras like the ASI071

just turn off CFA


B

[bjaffa]

Sorry I did not specify the camera fully. It is a ZWO ASI1600MC-COOL . Is a OSC and the CFA option has to be specified.
I did find out the Debryer option if it is changed from 'AUTO' to 'RGGB' seems to work. I don't believe I did this
with version 1.8.4.

[Howdy]

You may have run into the same problem I asked about last night (and to which I have not yet received any reply).

I'm assuming the images captured by the ZWO were in a format other than .xisf, and were converted to .xisf as part of the batchpreprocessing script.  My current hypothesis is that batch script does NOT embed image properties (including the CFA pattern) when it saves to .xisf.

If so, it seems to me the solution is to get the batch script to embed the properties while saving to .xisf.  However, I'm just not smart enough, or have the skills, to solve that problem (assuming that is the issue.)

[bvalente]

Ah, i see now.

well, the 071MC i own has the RGGB bayer, so it would make sense if it were the same on the 1600MC

B

[bjaffa]

Thanks all for your help. I found that you must specify a Bayer matrix (although I am
not sure which is the correct matrix) and that the earlier 'Auto' setting does not work
with the newer version