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,
Would it be possible to add a Canon Banding Reduction option ?
Thanks,
Bob
Do you see it remaining an issue in a stack? I think it should already be a signal in the bias or darks, might be mistaken.. Dithering will also reduce this.
Hi Vincent,
Yes, the banding is visible in the stack (see attached (extremely stretched) photos).
You are right to say it should be gone with darks.
However, since I use dithering and Bad Pixel Map, I found that I can process my photos with only Biases and Flats (as per option 1 in sticky post "Data calibration principles/rules") and achieve nearly the same result as with darks once the remaining banding is removed from the stack.
For this I use the process integrated in other processing softwares but it would be nice to have this function directly into APP.
edit: Maybe the banding reduction would be even more effective if applied on each sub, during calibration ?
Yes that would work better, but it’s not going to improve the data dramatically I think. It will reduce it of course, but I think you still get a better result in this case by using darks as well. That will be the actual data and not “guessed” by an algorithm.
In fact, it seems that this problem cannot be entirely solved with darks as the banding is not constant from one image to another.
There was a Yahoo group on this subject but those groups are now dead.
I did a test adding darks and here is the result.
Even though the problem has diminished, we can see that there are still bands.
I requested this feature because it is present in other programs and I thought it was a classic.
Unfortunately, this problem only affects Canon cameras (old ones ?) and only a few of them, I may be the only one who needs this feature.
