Relion now uses rlnOriginX(Y)Angstrom instead of rlnOriginX(Y)

[j-c-c]

Newer versions of Relion use Angstrom values for image offsets instead of pixels (see docs). The Relion metadata name has also been changed to rlnOriginX(Y)Angstrom. This causes an error if a user saves an ImageSource in ASPIRE and attempts to open the starfile in Relion, as the name rlnOriginX(Y) is not recognized.

[garrettwrong]

I'm sort of suprised they don't admit the old attributes or allow opening an older format file. I would think this would be a pain for them (unable to open their own files from a prior save...?).

Before getting too far, for a quick fix, it would be good to check that this isn't resolved my saving with a format/version attribute (that we are presumably missing).

I say that because while the right thing to do is to move toward >=3.1 attributes, a complication there is this will require pixel size in the base ImageSource class (or manually at save, annoying for devs), and in a way that doesn't clash with things that input/operate with ImageSource (filters etc). This issue probably will require more code reading/planning than it seems superficially.

[garrettwrong]

We have pixel size thread through our classes now. @j-c-c , maybe consider picking this up again.