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. Â Before I release it, I will make sure that everything is working properly and then I will release it.
Hi Folks,
I'm having a problem with background values computed by APP for a multi session runs. Â When I run a set of images from the same night as a single session, the background values computed by APP show smooth trends. Â However, if I attempt a multi-session run with two flats (one for each session), the same set images now has wildly varying background values ... even for consecutive frames which have very little actual background brightness difference.
The erratic background values only seem to occur for a multi-session run with separate flats. Â Below are some are screenshots illustrating the problem. Â Happy to provide data files if useful. Â Thanks for talking a look!
-Bret
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Single Session w/ all images from same night ... seems OK:
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Single Session w/ images from two nights (added the first four files) ... seems OK:
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Multi-Session w/ images from two nights and different flats for each night (darks and bias are the same) ... note the large variation in the background values such as frame #13 vs. #12 and #14 as well as the abrupt change after frame #18:
This might have something to do with the fact APP isn't separating the results per session in the graph, Mabula wants to change that to make it more consistent.
Hi Vincent,
Thanks for getting back to me.   It's more than just a graphing issue ... it affects the final integration results.   If you compare the data tables in screenshots, you can see how background values computed by APP in the multisession pic are very different than the single sessions above even for consecutive images in the same session / same flat.  The incorrect normalization is also visible when comparing  images that are calibrated (very little difference) vs. normalized (very different).
Currently, I'm unable to use the multisession combine feature of APP because of this ... I'm only able to combine multiple nights as a single session / same flat for all images. Â I had this happen once before and thought it was a fluke. Â Please let me know if there is something I should try or if I can upload my data for you to take a closer look.
Thanks!
-Bret
Interesting, I'll forward this to Mabula to see what he thinks about it. Thanks for sharing the potential issue!
