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Apr 14 2026: Google Pay, Apple Pay & WeChat Pay added as payment options

Apr 12 2026 APP 2.0.0-beta41 has been released !

It has a major performance boost of 30-50% over 2.0.0-beta39 from calibration to integration, for mosaics even faster! We extensively optimized many critical parts of APP. All has been tested to guarantee correct optimizations. Drizzle and image resampling is much faster for instance, those modules have been completely rewritten. Much less memory usage. LNC 2.0 has been released which works much better and faster. Improved Outlier Rejection with LN 2.0 rejection. macOS CMD+A works now in file chooser ! And more...

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.

 

Luminance file

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(@andybooth)
Red Giant
Joined: 4 years ago
Posts: 67
Topic starter  

OK, bit brain dead today,

what is the best way to get a luminance file from an RGB file?

input rgb combine, balance, then move colour sliders to 0% and save?

or am I overcomplicating things .

thx



   
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(@Anonymous 174)
Joined: 9 years ago
Posts: 5702
 

I'm not 100% sure (I asked Mabula on this one as well), but if you have a RGB sensor, I would probably split the channels for all data (tab 2 all the way down). This gives you mono data of each channel, then you load these in and assign them all to Luminance and integrate. I think that gives a pseudo-luminance result already, you can combine this with the integrated RGB data.



   
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(@mabula-admin)
Universe Admin
Joined: 9 years ago
Posts: 5146
 

Hi Andy @andybooth,

Luminance from an RGB file can be made using any arbitrary formula for the luminance from an RGB image like this one:

Original RGB

For example a common formula for luminance is that the luminance is based on 20% R, 70% G and 10% B:

With the RGB Combine tool, set all R,G,B sliders for the input channels to 100 and set the L slider for the input channels in such a way that you get that formula:

Luminance formula

Now, this result is a 3-channel image, if you split it, each channel is the same and can be used as a luminance for the image 😉

I have added to our issue list to make this easier 😉

Mabula



   
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(@andybooth)
Red Giant
Joined: 4 years ago
Posts: 67
Topic starter  

@mabula-admin 

Thank you sir!



   
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