June 24 2026 APP 2.0.0-beta46 has been released !
Improved internal memory configuration (lower ! memory usage), fixed beta45 startup issue, fixed Set Save Directory & 2-panel mosaics.
May 27 2026 APP 2.0.0-beta45 has been released !
Fully Multi-Threaded LNC, many improvements for the registration engine, platform upgrade, and further tuning of internal memory consumption and memory release back to OS.
Apr 14 2026: Google Pay, Apple Pay & WeChat Pay added as payment options
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.
How is the blue channel composed when using Ha-OIII Color.
The algorithm Ha-OIII Color and the Airy Disc are almost identical if you compare the end result.
I am asking since I wish to use the data in the blue channel, then composing in the RGB Combine tool.
Extracting Ha, OIII and then redoing the stack for Ha-OIII Color just to get the blue channel is cumbersome.
Â
/Stefan
How is the blue channel composed when using Ha-OIII Color.
The algorithm Ha-OIII Color and the Airy Disc are almost identical if you compare the end result.
Both the blue and green channel contain OIII data. The exact amount depends on the filter used and the sensitivity of the green and blue pixels to the passband of the filter. The difference between the two is that choosing Ha-OIII Color makes APP split the Ha and OIII channels (by combining the G and B channels into OIII), process the data and then split up again. This will result in slightly lower noise when compared to Airy Disc.
I am asking since I wish to use the data in the blue channel, then composing in the RGB Combine tool.
Extracting Ha, OIII and then redoing the stack for Ha-OIII Color just to get the blue channel is cumbersome.
This is the only way to separate Ha and OIII in APP. In a future version it will be possible to split Ha and OIII in one go. You can extract the G and B channels and combine them into a single OIII mono image yourself in external image processing software if you prefer.
HTH, Wouter
Ok,Â
Thanks!
Â
/Stefan
