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Title: Smart align -- A new tool for robust non-rigid registration of scanning microscope data

Journal Article · · Advanced Structural and Chemical Imaging
ORCiD logo [1];  [1];  [2];  [3];  [4];  [5];  [1];  [1]
  1. Univ. of Oxford, Oxford (United Kingdom)
  2. Univ. of Oxford, Oxford (United Kingdom); Daresbury Lab., Warrington (United Kingdom)
  3. Yale Univ., New Haven, CT (United States)
  4. Univ. of Antwerp, Antwerp (Belgium)
  5. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Many microscopic investigations of materials may benefit from the recording of multiple successive images. This can include techniques common to several types of microscopy such as frame averaging to improve signal-to-noise ratios (SNR) or time series to study dynamic processes or more specific applications. In the scanning transmission electron microscope, this might include focal series for optical sectioning or aberration measurement, beam damage studies or camera-length series to study the effects of strain; whilst in the scanning tunnelling microscope, this might include bias voltage series to probe local electronic structure. Whatever the application, such investigations must begin with the careful alignment of these data stacks, an operation that is not always trivial. In addition, the presence of low-frequency scanning distortions can introduce intra-image shifts to the data. Here, we describe an improved automated method of performing non-rigid registration customised for the challenges unique to scanned microscope data specifically addressing the issues of low-SNR data, images containing a large proportion of crystalline material and/or local features of interest such as dislocations or edges. Careful attention has been paid to artefact testing of the non-rigid registration method used, and the importance of this registration for the quantitative interpretation of feature intensities and positions is evaluated.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1214821
Journal Information:
Advanced Structural and Chemical Imaging, Vol. 1, Issue 1; ISSN 2198-0926
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

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