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.
Hi,
Here is an integrated image of 3 x 20min. (Ha) frames and 3 x 25min. (Ha frames), so a total of 6 frames. I used the Ha Algorithm from Tab 0 and it has darks, bias, bpm and flats applied to it. I can't see any nebulosity. I just see a black bakcground with stars, so no contrast. It was taken from Portland Downtown with a QHY9M and narrowband filter.
Dropbox File (Private or Invalid)
If you have tips for processing single Ha frames, please let me know. My goal is to have a good Ha integrated image, and then integrate my Ha image to a OSC image of the same object, and if you have tips for doing Ha + Color, please let me know too.
Please, let me know what you think and/or if you can see any nebulosity.
Best,
Miquel
Something is wrong with your data file, stretching has no effect on it.
Do you care to post the 6 original fits frames ?
Hi Joao,
I just put everything and one correction, it's 5 sub-frames. 3 subs at 20min and 2 frames at 25min. The above folder should contain now, all the frames, master flat, master dark, master bias and BPM.
Dropbox File (Private or Invalid)
Also, here are some screenshots on how I have SGP configured for my QHY9M. I don't know if an SGP setting could be affecting offset or gain and hence, clipping my black point to the point that it can't be stretched.
https://photos.app.goo.gl/GSzBwDVTWSvKf9N98
I look forward to hear you feedback.
Best,
Miquel
Sorry for the delay, I'll have a look as well, stay tuned. 🙂
edit: upon reading your process, you don't want to select the Ha algorithm in the 0-tab as this is meant for one-shot colour camera's.
Hi Vincent,
No worries. After checking in a couple of other forums. I learned that my offset and gain settings are very likekly the reason for my black point to be clipped. I will re-take these images when I have clear skies with the new settings and hopefully, all good.
Thanks for jumping in to help. Best, Miquel
