Quote:
Originally Posted by Cimitar
Hi Col,
Not sure if this will meet your need, however wanted to post just in case. A program I use specifically for removing banding in images is called "Fitswork". It's free and you can view/download it here - http://www.fitswork.de/software/softw_en.php. I have no affiliation with the software, I'm just a happy end-user.
Fitswork is very good. It also does other astro processing things, however all I do is run the program, open my image (usually the final stacked image, prior to processing) and run the following menu command: Processing, Background Flatten, Lines to Equal Values. I then typically use an Absolute Median Level of 50.0 (although you can alter it to achieve the desired effect).
I've attached a sample of how it helped me remove banding from a 15min exposure on my DSLR (note - ignore the star trailing, I was purely testing the noise/banding issues that might crop up when using such a long exposure). I also ran your noise panel through Fitswork and have attached the end result. It looks like it could be making a positive difference.
On a final note, if you have banding issues in your individual frames, could you be multiplying the issue as you mosaic the whole thing together?
Cheers, Evan |
Thanks for that Evan, I'll have to give it a look over. It appears like it does the same routine as the CanonBanding routine in PixInsight. A quick test suggested to me that it should never be done on edited data
I have started reprocessing every frame making that my first step. Couple of hours in it appears to be making a difference although now that I am nearing the end (20 more to go, do that tomorrow) it looks like it has thrown my whole colour balance off and damaged some other aspects so I think I'll have to start over again anyway :/