Difference from raw image and image in npy
I am working with some EDF (European Data Format) images, and I have the following problem: if I load the files in a npy array, and I compare a certain array element with the corresponding raw file, I get that
- The files look the same BUT
- The difference is not 0. Plotting
Image_from_stack - Ram_image, I get a striped value distribution (see image). Does anyone have a suggestion on what could be the cause for this, and how to fix it?
To make things more interesting, the difference changes from image to image, but it always shows a striped pattern.
I am working in python.
A note for future readers: the problem explained above was related to a scientific programming script running on a high performance computing machine. The script was using a substantial amount of memory (up to 100 GB).
My guess is that the striped pattern effect presented above is related to such anomalous memory requirements. After rebooting the machine I couldn't replicate the problem.
So in case you see something similar, check the memory usage. If it's very high, give reboot a chance!
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