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08 Apr 2018
INDI development team is happy to announce the release of INDI Library v1.7.0. This new exciting release builds on the maturity of INDI Library and comes with many new supported devices and fixes for existing drivers.
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TOPIC: Mirrored Fits : Fits header missing order information ?

Mirrored Fits : Fits header missing order information ? 2 months 8 hours ago #25477

  • Gilles
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Hi
I'm starting to use Siril as image stacker :
free-astro.org/index.php?title=Siril
I noticed that when i open images taken with KStars, they are inverted against Kstars fits viewer.
Siril's developper told me that it' because fits header doesn't contain information about how to read them...
(no indication of lines order)
What do you think ?

Gilles.

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Mirrored Fits : Fits header missing order information ? 2 months 7 hours ago #25480

  • jpaana
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Yes, this is a problem with FITS as there doesn't seem to be a standard keyword to indicate which way the image should be, which is why PixInsight for example has configurable orientation. Looking at the source it seems Siril unconditionally flips the image, which is also the default with PixInsight as it seems to be more common. INDI just dumps the data to file and most cameras have origo at top-left so the image ends up flipped in these programs.
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Mirrored Fits : Fits header missing order information ? 1 month 4 weeks ago #25613

Could it be possible to add a keyword, even non-standard, to write the type of data ?
bottom-top, ... or others ?
I believe that some softwares use this kind of keywords.
In this case I would add something in Siril.

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