axes fix for loading JPG with no exif_tags

ThorstenBASF commented 3 weeks ago

Description of the change

A few sentences and/or a bulleted list to describe and motivate the change:

JPG files with no exif_tags had no axes or dimensions when loaded.
instead of returning empty axes, axes are returned with an scale of 1 pixel/pixel.
with fix this images can be handled with hs/axes commands as usual. (s.calibrate e.g.)

Progress of the PR

[ ] Change implemented (can be split into several points),
[ ] update docstring (if appropriate),
[ ] update user guide (if appropriate),
[x] add a changelog entry in the upcoming_changes folder (see upcoming_changes/README.rst),
[ ] Check formatting of the changelog entry (and eventual user guide changes) in the docs/readthedocs.org:rosettasciio build of this PR (link in github checks)
[ ] add tests,
[x] ready for review.
[x] add testfile

Minimal example of the bug fix or the new feature

import hyperspy.api as hs
tfile = "./rsciio/tests/data/image/jpg_no_exif_tags.jpg"
s = hs.load(tfile)
s.calibrate(x0=0, y0=0, x1=0, y1=1, new_length=0.2, units="nm", interactive=False)

codecov[bot] commented 3 weeks ago

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 86.52%. Comparing base (de98a8e) to head (2b38d85). Report is 4 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #283 +/- ## ========================================== + Coverage 86.33% 86.52% +0.18% ========================================== Files 83 83 Lines 10674 10676 +2 Branches 2332 2332 ========================================== + Hits 9215 9237 +22 + Misses 940 922 -18 + Partials 519 517 -2 ```

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ericpre commented 2 weeks ago

pre-commit.ci autofix

hyperspy / rosettasciio