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,
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I've been trying to process some images I've taken with one shot color camera. If I run them trough APP without forcing debayer the integration looks alright in the end. It's just black and white. When I do force debayer however the integration image comes out black. Each of the image in the series still looks okay before integration. One thing to point out that the histogram in this black integration image is just one thin spike. I will attach some pictures to show what I mean. This is probably something very silly I'm doing wrong here.
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One image before integration as sample:
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This is what the integration looks like:
@morrenmaa What camera do you use and what CFA matrix does it have? Are you sure you select that in tab 0 when forcing debayer? Also, can you post an example of the result of the integration without forcing debayer?
@wvreeven It's the T68 from iTelescope. According to their website the camera is ZWO ASI071 Pro Color. I've searched internet on which pattern I should use on that camera and I've seen answers pointing to both RGGB and GBRG. I get same result with both options.
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I did do one more observation. When I force debayer, after I normalize I get unable to normalize or something similar on the SNR & noise tab for each light frame. I am not seeing that when I am not forcing debayer.
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Here's unedited integrated image without force debayer.
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@morrenmaa I have no experience with iTelescope and have asked Vincent and Mabula to chime in.
Thanks Wouter!
So, could you check the FITS header to see if you see the RGB pattern mentioned in there? And maybe also try stacking without any calibration files, just to see if there is an issue there.
Hi @morrenmaa,
I think there will be an issue with the calibration data that causes this problem. What kind of frames are you using?
Is it lights and calibration frames? Or lights with pre-created masters?
Like Vincent indicates, what happens if you don't use calibration data, will you get a stack with color and information?
Mabula
@mabula-admin and @Vincent-Moderator Thanks a lot. That was the issue. I'm getting data with color when leaving the calibration data out. I'm using the pre-created masters from iTelescope. Looks like I need to download the raw calibration data or the pre-calibrated images. I think I'm going to go for the raw calibration data and see what happens.
Nice and thanks! Do also mention this to iTelescope as they need to know if the calibration data is correct or not.
