UPDATE FROM MABULA
I have had a very rough 2 months unfortunately health wise. I was struck 3x in a row with bacterial infections. The second infection occurred after a routine hospital checkup and I became very sick. I had to rest and take a lot of antibiotics. Once I was recovering and restarting work 1 month ago, I again became sick. The infection was not yet gone, so even more antibiotics and rest was needed. Needless to say, it took a lot of my energy and I needed a lot of rest.
Finally, the infection is really gone and my energy is coming back step-by-step now and I have started work again. I am terribly sorry to have kept you waiting for support. I will address all outstanding questions and e-mails step-by step and will be on the forum daily from today.
APP 2.0.0-beta47 will come soon as well, a lot of work was already completed before I became very ill, so the release is also nearly ready for you. Beta47 will be much faster actually. Many workflows will be more than 2x faster, mosaics can even be 10x faster than before because registration really received a major boost... all compared to beta46. Before I release it, I will make sure that everything is working properly and then I will release it.
Hi,
my question is: which is the best de-Bayering algorithm for astrometry and/or photometry when using the images from a one-shot color camera with a large FOV (short focal length) of several degrees?
Did somebody here already use the „Adaptive Airy Disc“ (AAD) algorithm for that purpose? Or would another de-bayer algorithm give better results?
Probably I have to explain here, what the reason for this question is: currently I am doing an experiment using a one-shot CMOS color camera (with Sony IMX571 chip, APS-C format, back-illuminated) with 3.76 micron pixels on the 135mm Samyang Lens. This gives about 6“/pixel (without binning). I want to find out which astrometric/photometric precision can be obtained with this equipment.
My first experience is that residuals (against ATLAS2 catalog) over this large FOV are in the range of 0.5 to 2.5 arcsec. All over! The photometric precision was a bit below 0.1 mag when restricting comp stars to 15 arcmin neighborhood. So far not too bad with such equipment (and without the de-bayer algorithm of APP).
Does anyone here have some experience with de-bayering and could give advice how best practice is for the mentioned purposes (and the above equipment)?
Best regards,
Hipoh
Hi,
my question is: which is the best de-Bayering algorithm for astrometry and/or photometry when using the images from a one-shot color camera with a large FOV (short focal length) of several degrees?
Did somebody here already use the „Adaptive Airy Disc“ (AAD) algorithm for that purpose? Or would another de-bayer algorithm give better results?
Probably I have to explain here, what the reason for this question is: currently I am doing an experiment using a one-shot CMOS color camera (with Sony IMX571 chip, APS-C format, back-illuminated) with 3.76 micron pixels on the 135mm Samyang Lens. This gives about 6“/pixel (without binning). I want to find out which astrometric/photometric precision can be obtained with this equipment.
My first experience is that residuals (against ATLAS2 catalog) over this large FOV are in the range of 0.5 to 2.5 arcsec. All over! The photometric precision was a bit below 0.1 mag when restricting comp stars to 15 arcmin neighborhood. So far not too bad with such equipment (and without the de-bayer algorithm of APP).
Does anyone here have some experience with de-bayering and could give advice how best practice is for the mentioned purposes (and the above equipment)?
Best regards,
Hipoh
Hi @hipoh,
Thank you very much for your interesting question.
I would suggest to you that you do try Adaptive Airy Disc, it should work well. But for best precision, do not demosaic/debayer at all, but rather use Bayer/X-Trans Drizzle, you can set this in 6) Integrate at the bottom 😉
Use Bayer/X-Trans drizzle and set the drizzle droplets to 2 pixels. That should give similar results as demosaicing/debayering in terms of resolution. If you set the droplets lower, you will gain resolution, but will also have more noise.
Let me know if this helps 😉
Mabula
Thanks for your valuable suggestions! I will try both and will report here about the results.
CS! hipoh
