Mar 28 2026 APP 2.0.0-beta40 will be released in 7 days.
It did take a long time to have the work finished on this and it will have a major performance boost of 30-50% over 2.0.0-beta39 from calibration to integration. We extensively optimized many critical parts of APP. All has been tested to guarantee correct optimizations. Drizzle and image resampling is much faster for instance, those modules have been completely rewritten. Much less memory usage. LNC 2.0 will be released which works much better and faster than LNC in it's current state. And more, all will be added to the release notes in the coming weeks...
Update on the 2.0.0 release & the full manual
We are getting close to the 2.0.0 stable release and the full manual. The manual will soon become available on the website and also in PDF format. Both versions will be identical and once released, will start to follow the APP release cycle and thus will stay up-to-date to the latest APP version.
Once 2.0.0 is released, the price for APP will increase. Owner's license holders will not need to pay an upgrade fee to use 2.0.0, neither do Renter's license holders.
After calibrating bias, dark, and flat frames from last night's first attempt at narrowband imaging using Zwo asi 1600-cooled-mono camera, I get the attached screen short error when trying to register the subs.
ImagesPlus will process the same subs and combine.
I am using the default settings in APP.
Any advice would be greatly appreciated.
Thank you,
Mike Oliver
Hi Mike,
I think you encountered a registration bug here that is solved in the latest version 1.054.
Please download the latest version and let me know if that solves it 😉 :
If it doesn't, could you please show me a screenshot of the console output when the error occurs and as much information as possible from the bottom file list panel, like how many stars were detected for all frames and their FWHM size. That should help in understanding where the problem occurs.
Kind regards,
Mabula
Thank you for the response. Unfortunately, I still have the same problem with these images. It was my first attempt with the camera and it wasn't well-focused, so the issue may be my poor data. I've attached screenshots of the attempt to integrate the Oiii subs. Tried several times with these and some H-alpha subs. Sometimes normalization failed, not registration. Once a stack was produced but the alignment was off.
I have had good success with your excellent program with my dslr images, so it must be this poor data.
Cheers,
Mike Oliver
Hi Mike,
Yes, the screenshots that you provide do clarify why it's not working. Thanks for uploading them 😉
In the last screenshot, you can see that the stars are circles, so that means the images are not in focus (pretty far away from good focus).
The amount of detected stars is very low or 0 and the FWHM values are totally off. APP uses the most general 2D gaussian function to analyse/fit the stars and determine the FWHM values. On a circulair shaped ring of intensities, this will not work I am afraid... It will work robustly and precisely, however, on all kinds of star shapes like
- stars with aberrations (coma, chromatic aberration) and
- sub-optimal guiding giving elongated stars.
So, yes, out of focus images are a problem for APP, but only if they are far away from good focus like this.
Kind regards,
Mabula
Thank you for the explanation. I was focusing using only the luminance filter thinking the other filters would be in focus, and they obviously were not.
Cheers,
Mike
You're welcome Mike 😉
