Bug #2202
closedK2 DD corrected frame alignment fails with certain gain references
100%
Description
I am filing this bug due to the problems that I have had aligning my K2 frames in the dataset 12dec22a.
the main problem that I have experienced is that, when using different gain-normalization images for correcting the raw frame stack, the program dosefgpu_driftcorr gives drastically different results, often times failing, as judged by the shifts and summed image. While I was collecting data, I was testing out different methods of gain corrections, then creating a raw-frame stack, then testing Yifan's program outside of Appion, and looking at the Log files & summed images. In particular, I was interested to see that the alignment parameters are consistent (i.e. they decrease / increase, but they do not jump all over the place). The gain corrections that were tested during that data collection were (all differences for the bright only, and I think I am listing them correctly, although it might be worth looking into the database to double check):
2000 ms * 10 frames -- collected at the start of the session on 12/22, hardware gain corrections were done beforehand, but given what you have said, I wouldn't assume that they had any effect
250 ms * 10 frames -- collected morning of 12/23
5000 ms * 10 frames -- collected 12/23, ~1 PM, hardware gain corrections were redone, and I believe I unchecked / rechecked the box to reupload them (although I'm not sure that this was done correctly and that re-uploading actually occurred)
5000 ms * 10 frames -- collected 12/23, ~3:30 PM
All this is to say that, the main thing that I would like to determine is whether or not I can reuse a specific set of gain references in order to make my aligned frame stack, then test the frame alignment. For example, one thing that would be great is to reuse the gain references from 12dec05a (collected under otherwise identical conditions) in order to align 12dec22a.
Anchi, if you would like to test this for yourself to see what I am referring to, you can go into the directory /ami/data00/appion/12dec22a/ddstack/testanchi (should be read/writable by all), create a single corrected frame stack using a specific set of gain references, then align using dosefgpu_driftcorr.
Let me know if you need any more information, and I'll be happy to provide whatever I can.
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