wrong calibration reported for Gatan Digital Micrograph dm4 file

[ialxn]

TEM images recorded with a Gatan OneView camera can contain less pixels than present in the camera. In my case the image stored in the dm4-file is 4095 x 4094 pixels (w x h) instead of 4096 x 4096 pixels of the camera.
The calibration values (size of pixels) reported in ImageJ are:

Image -> Properties reports (after changing units from micron to nm)

Pixel width : 0.0507018
Pixel height : 0.507141

These values should be equal and independent of the size of the (non-square) image. The same bug (same values reported) is also present in the Gatan reader of openNCEM. More details are reported in ercius/openNCEM#71.

[melissalinkert]

Thanks @ialxn. Would you be able to share an example file that demonstrates this problem so that we can test any potential fix? If so, please upload to https://zenodo.org/communities/bio-formats/.

[melissalinkert]

Thanks for uploading https://zenodo.org/records/17176730, @ialxn.