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.
At the moment (unless I am missing something!) when you want to crop you need to draw the box around the cropping area. That doesn't allow fine adjustment and can also make very fine cropping almost impossible.Â
I'd like to see that the box size can be changed on each line independently and that you can also use this on a zoomed in version. That way if you want to crop as little as possible you can be very precise and accurate with your cropping tool.
Hi Sara,
Currently there are 2 ways to make crops:
- drawing crops
- providing offsets for all borders, the number you enter are pixels. With positive values, you crop, with negative values you uncrop.
Making the crops while being zoomed in or making fine adjustments using values that are shown would be something for my RFC list. I'll write it down.
In cases where I needed very fine cropping, I usally cropped a previously cropped image. So I would use it iteratively.
Mabula
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cropping does not seem to work for me
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@ancalime Gideon, a little more info would be appreciated. What version of APP are you using? How are you trying to crop images?
Version 1.082 and I am trying to crop in tab nr 9. Draw box, press crop image, save image, and see that image has not changed (stacking artifacts are still there)
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@ancalime The cropped and saved file has a slightly different name than the original. Do the sizes of the two files differ? A very obvious question but I have to ask it: is the file saved in the directory where you expect it to be saved or perhaps in a different one? Please check the working directory and make sure it is there.Â
It is.... I seemingly have to click on the picture itself down below in the list. I thought that went automagically. It works. Thanks for the pointer! I also figured out the debayering process. Files show as GBRG, whilst camera is RGGB. Selecting RGGB in Tab 0 and force CFA did the trick. No idea why the fits indicate GBRG. Lekker prutsen, dan kom je er wel 😉 Thanks Wouter
