PixInsight Forum (historical)
PixInsight => General => Off-topic => Topic started by: ramv on 2012 January 22 09:31:53
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Hi,
Another newbie question here: I am combining two linear images of the Orion Belt/Sword area with HDR composition and I started getting this error.
"Incompatible Image Geometry".
Both images are at the same focal length and are very nearly the same size. I have attached a screen shot.
Thanks,
--Ram
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They need to have exactly the same size. Use one of the available crop tools.
Thinking about it: They should have the same size after a StarAlignment.
Georg
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Georg, did you mean same size (as in same dimensions) or same scale(focal length)? I thought the latter was true but wasn't sure about the former.
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Same number of pixels in X and Y. You can see these numbers when you inspect the status bar at the bottom of the PI windows
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it is possible that this is related to a bug in PI. do you have any windows shaded (just the title bars showing?)
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Hi pfile,
I believe I was able to see the windows. (see my attached file from my earlier post). Is there a bug related to HDR composition or registration? Where can I read more about it?
I worked around this issue by re-registering the shorter of the HDR exposures against the reference frame and redoing this. It appears to have worked now.
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Hi Ramv,
Reregistering was my first solution too. But I think there is a cleaner method -- at least it works for me.
Say you have two images (1 and 2) that are the short exposures integration and long exposures integration.
For me, both are registered (star aligned) using the same reference. Both are taken with the same scope, focal length and camera. And other limitations may also apply.
a) Start a dynamic crop on image 1. Create the size of the crop (image 1) you desire, but do not execute it yet.
b) Drag the blue triangle from the original dynamic crop window onto your PI workdesk. This creates another instance with the same size parameters.
c) Execute the crop on the image 1. Then close the original dynamic crop operation.
d) Bring image 2 to the front. Open the cloned dynamic crop operator and execute. This should result in the same crop size for image 2 as image 1.
You should be able to do individual linear operations (Background neutralization, DBE, etc.) to either of the two images after that and then successfully execute the HDR Composition operator.
Good luck.
Mark
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Hi pfile,
I believe I was able to see the windows. (see my attached file from my earlier post). Is there a bug related to HDR composition or registration? Where can I read more about it?
I worked around this issue by re-registering the shorter of the HDR exposures against the reference frame and redoing this. It appears to have worked now.
no there's no bug in HDRcomposition or StarAlignment. there seems to be some odd issues with Pixinsight not knowing the geometry of a window that's been shaded.