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.   I had this happen once before and thought it was a fluke.  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!