Re: Stacking via WCS results in blank images

Posted by cduston on Jul 06, 2017; 1:52pm
URL: http://astroimagej.170.s1.nabble.com/Stacking-via-WCS-results-in-blank-images-tp708p711.html

Hi Karen,

    Thanks so much for helping.

1) The "remove background and scale" option is not checked.

2) Tried to load them directly into memory, by leaving the "virtual stack" button unchecked. In this case, with "Use only WCS headers..." checked, I get blank images immediately post-alignment. I guess that's expected behavior - the images look exactly like the ones copied into "aligned". There is a 0 at every pixel.

I will send these images to you right now, and if we find a fix I'll add it to this thread.

Thanks!

Chris

On Thu, Jul 6, 2017 at 5:58 AM, karenacollins [via AstroImageJ] <[hidden email]> wrote:

Since AIJ is creating a new directory for the aligned images, I think you opened the images as a "virtual stack". If that is the case, can you try opening the images directly into memory to see if you still have that problem? In this case, the images will be keep in memory and not written to a subdirectory. Let me know if you still see the problem.

One thing to check. Make sure the option "Remove background and scale to common level" is not enabled on the alignment setup panel.

Either way, if you can send me the two sample images directly to karenacollins at outlook dot com, I can try to reproduce the problem on my system. My limitation is that I run Microsoft Windows and don't have access to an Ubuntu machine, but if I can't duplicate under Windows, I can try it on a system with an alternate linux distribution.

Karen

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