2026-10-09 APP 2.0.0-beta48 has been released !
This is mainly a bug fix release for the reported bugs in beta47. In addition it has a significant User Interface performance improvement noticable when you need to process 1000s of images in APP.
2026-10-03 APP 2.0.0-beta47 has been released !
This is a very big release... many code optimizations/rewrites, many parts of APP are much faster and more precise, especially star analysis and registration are much faster ! Big mosaics will go much faster 🙂
And we introduce a new preview filter, which includes the new Adaptive Deep Sky Stretch and a General Levels Stretch, this has been long over due. The old preview filter (the panel on the right side to stretch and preview your data) has not been updated for a couple of years and it is a critical part of any APP session.
Adaptive Deep Sky Stretch or ADSS is a much more intuitive stretch algorithm. It is also color preserving (which is a great new addition in itself ! ) which means that the highlights are no longer bleached, color is maintained from the linear data while stretching. You can simply stretch your data using the sky background level and signal width sliders which work much easier and more intuitive. You no longer need to fiddle with the old complicated sliders with zoom buttons. All the zoom buttons for the sliders are made redundant. And you can enter slider values in the slider value fields yourself. I will make a youtube video in the coming days to explain and fully introduce ADSS. Once the video is ready, it will be highlighted on the forum.
RGB Combine upgrade !. The RGB Combine Tool has been rewritten mostly. The tool is faster and easier to use and most importantly, the Luminance slider to inject a luminance channel or channels into the RGB composite is now working correctly. It no longer bleaches the RGB colors. Combined with the new ADSS preview, you will get much better and easier great composites with great color! I will also explain this in a new youtube video.
Dear astro-friends,
I trust your are all doing well. Please allow me to open this new topic regarding an issue that I have been experiencing and which I am still unable to find a proper answer. I would be grateful if you could help.
When the overall stacking process is over, I have no image. I am using lights, flat, dark flat, and dark. Despite double-clicking, nothing happened. In addition, it's like the histogram at the top right is "empty".
It might be culprits are my calibration frame. I ve tried to integrate only Flat and Dark flat = same issue. Did the same with only Darks = same issue. I am unable to explain what's going on. I didn't change anything in my process.
FYI, by loading only lights in the system = it's work, there is an image.... 🤔 🤔
Can someone share his experience ?
I thank yo in advance for your kind support.
Regards,
Aygen
We're here to help so thanks for the question! Can you also try integrating with just the darks?
Dear Vincent,
Thank you for your kind support. I just tried again only with darks - same results - no image after integration. I am a bit lost to be honest. As for the darks, they are of the same exposure, t-degree, etc. than my lights. What shall I do ?
Oops sorry, I meant without any calibration data, so no darks. 🙂 Or did you test that already, given the last sentence of your original question? If so, then there is an issue with the darks most likely. You can upload some darks and lights to us if you want;
Go to https://upload.astropixelprocessor.com and use upload1 as username and upload1 as password.
Create a directory named “rkas12-darksproblem” and upload in there. Thank you!
Was my first step. Without calibration I do have an image, as mentioned in my first reply.
Since I haven't moved / touched my equipment - I will redo my F, DF, and D. But honestly I don't know what went "sought".
I will keep this thread updated.
If you upload your darks with some lights, I can probably tell what is going on. But if you're not able to, check your offset for instance. The offset shouldn't be very low (or 0, which sometimes happens).
I can upload my files if you want - with pleasure. How shall I do ?
If you scroll up 3 messages, you'll find the information I provided. 😉
@vincent-mod
My bad :). However, when entering the upload1 and upload1, getting an "error"....arff
So you go to the address, it has a login screen and you enter upload1 as both the username and the password. It works here at least so the server is ok.
@vincent-mod
All good - it working.
Just uploaded the files.
Thank you for any help...
Below is the integration lights without calibration... not too bad though.
Exellent, I'll have a look at them today.
Update : just try the integration process once again with freshly new taken dark (same exposure etc. etc.). Integration now shows an image while before it did not 😫 . Also, what could be the reason for the stacked image to be of different color while using dark and not ? In my very example colors are being showed differently before and after using new freshly done dark.
Thanks or your reply.
Sorry, missed your reply. So you solved it with new darks? Yes, that happens sometimes and it's a bit of a mystery as to why. Usually it's just a setting that was missed in the not working ones, without being obvious.
