Preview stretch bug...
 
Share:
Notifications
Clear all

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.

 

Preview stretch bug?

2 Posts
2 Users
0 Reactions
1,361 Views
(@readyjetty)
Neutron Star
Joined: 4 years ago
Posts: 79
Topic starter  

I noticed that if I integrate a job with lots of field rotation (using Alt/Az) and the final stack has some blank/black areas, if I export to PixInsight to do one task (like BlurXterminator or dynamic crop) and export as FITS, the preview stretch is all funky and way over exposed.

 

 here is an example:

image

 

 Believe me, this data is just fine, it's an image of a galaxy cluster and displays well in PI.   PI will also sometimes do similar things from images if there is too much black area outside of the integrated subs.   I expect this has to do with the preview stretch algorithm being trigger by so much 100% black when the image has a fairly bright background.   

Perhaps you need the algorithm to detect that some of the image is 100% black background and not include this in your stretch parameters...  not sure, just guessing here.



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

I assume you're stretching in PixInsight while saving to a fits file? What happens if you switch stretching off in app? It may also be interesting to see what happens if you crop out the black parts, because that may indeed also cause issues.



   
ReplyQuote
Share: