Digital Darkfield Analysis of Lattice Fringe Images with ImageJ
نویسندگان
چکیده
منابع مشابه
Digital Darkfield Analysis of Lattice Fringe Images with ImageJ
Digital-darkfield analysis involves the spatial mapping of selected frequencies across a digitized image, much as analog (e.g. electron-optical) darkfield-imaging allows one to locate crystals responsible for a given diffraction spot. This analysis involves a type of image decomposition which, like wavelets, is intermediate between direct and reciprocal (spatial-frequency) space [1]. Digital-da...
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In this thesis I present the progress I made in understanding, improving and applying a digital method for lattice fringe spacing measurements in HRTEM images. The method uses filtering in Fourier space to form complex valued dark field images. These images are bright where the image contains the selected periodicity and dark otherwise. The amplitude and phase information in these dark field im...
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Individual diffraction patterns only provide 2nd-moment (e.g. atom-atom correlation) data on specimens, while HRTEM and z-contrast images provide information on higher order correlations as well. Variable coherence-width microscopy [1], and high-tilt lattice-parameter determination [2], involve ways to quantitatively characterize higher order (e.g. pair-pair) correlation by examining data from ...
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ژورنال
عنوان ژورنال: Microscopy and Microanalysis
سال: 2014
ISSN: 1431-9276,1435-8115
DOI: 10.1017/s1431927614005844