STEM image acquisition typically requires significantly more time compared to fixed-beam TEM imaging. Due to inherent system instabilities, such as sample drift, the resulting images may exhibit noticeable distortions. For example, round particles may appear slightly elliptical or rectangular lattice cells may exhibit monoclinic distortion. Fortunately, these distortions can be corrected post-acquisition.
To address STEM distortions, a solution involves capturing two STEM images of the same area with perpendicular scanning directions. The plugin offers various levels of undistorted image reconstruction. The basic version assumes linear drift during both acquisitions, while the advanced version tackles non-linear instabilities, essential for high-resolution STEM images.
last updated 31.12.2021, version 1.82
If you download STEMCOR, it is strongly recommended to download also the STEM correction learning examples: