Author Topic: Image geometry  (Read 193 times)

Offline JGMoreau

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Image geometry
« on: 2017 May 18 13:35:18 »
Hi, Curious situation here. Cannot open with blink, a fresh batch of new images, PI says wrong image geometry, although
taken with usual camera (QHY10)
Those of last night opened without problem.
Any idea ?

Jean Guy Moreau
Quebec, Canada

Offline Niall Saunders

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Re: Image geometry
« Reply #1 on: 2017 May 18 14:11:08 »
Bonjour Jean Guy,

Looking at your attached screen shot, the first images (prior to the warning message) seem to have a very large pixel count (X and Y dimensions) compared to that of the 'warning' image.

As a QHY10 user myself, I always see the 3896 x 2612 dimensions in my FITS images. I don't know how, or why, you are seeing images with pixel dimensions of 4656 x 3520. These far larger images represent a 'standard' QHY10 image with a border of 380 pixels on the left/right sides, and 454 pixels on the top/bottom sides. I have no idea how a QHY10 camera vould provide images with these dimensions.

Were the first group of images taken with the QHY10?

Have you tried to 'Blink' all of the images excluding the initial group?

What software are you using to capture images, and is it possible that any settings might have changed since those you acwuired the previous evening?

Are you, in fact, trying to blink images from the previous night with the new batch of images acquired yjereafter?

Perhaps you need to open the first group (or, at least one of the first group) of images alongside the image that is 'failing' (but yet is the 'correct' size for a QHY10 imager.

I am convinced that this is not a PixInsight issue - the reason for the actual failure (i.e. the differing image szes) is clearly indicated in the Console Output.

Hope this helps.
Cheers,
Niall Saunders
Clinterty Observatories
Aberdeen, UK

Altair Astro GSO 10" f/8 Ritchey Chrétien CF OTA on EQ8 mount with homebrew 3D Balance and Pier
Moonfish ED80 APO & Celestron Omni XLT 120
QHY10 CCD & QHY5L-II Colour
9mm TS-OAG and Meade DSI-IIC

Offline JGMoreau

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Re: Image geometry
« Reply #2 on: 2017 May 18 21:08:19 »
Hello Niall, thanks for coming back.
I finally sorted it out. I use 2 cameras simultaneously with Nebulosity 4, the QHY10 and a QHY163C
and some images were saved in the wrong files, probably operator mistakes, as I had to stop/restart because of passing clouds.
Cheers,

JG Moreau
Québec

Offline Niall Saunders

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Re: Image geometry
« Reply #3 on: 2017 May 18 22:36:32 »
Hi Jean-Guy,

Well, I had certainly hoped that was going to be the case  ;)

But, no problem, I also know what it is like to stare at a problem that has no obvious solution (that I could see) but which was so easy to spot from another's viewpoint.

I look forward to seeing some of your QHY10 images.
Cheers,
Niall Saunders
Clinterty Observatories
Aberdeen, UK

Altair Astro GSO 10" f/8 Ritchey Chrétien CF OTA on EQ8 mount with homebrew 3D Balance and Pier
Moonfish ED80 APO & Celestron Omni XLT 120
QHY10 CCD & QHY5L-II Colour
9mm TS-OAG and Meade DSI-IIC