| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8038550 | Ultramicroscopy | 2012 | 20 Pages |
Abstract
⺠Unbiased and precise defocus and astigmatism estimation with related uncertainties. ⺠The background in the PSD is suppressed by adaptive filtering. ⺠Robust template matching in polar representation detects also very low astigmatism. ⺠Outlier rejection of detected rings based on equidistance of CTF zeros in q2-space. ⺠Thon ring averaging (with Cs influence) can enhance the SNR of the rings in 1D PSD.
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Authors
MiloÅ¡ VuloviÄ, Erik Franken, Raimond B.G. Ravelli, Lucas J. van Vliet, Bernd Rieger,