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Figure 1
Schematic illustration of the proposed TVDM principle for aligning similar images. Panels (a) and (b) show the target and source images It and Is. (c) It − Is when two images are aligned. It has non-zero background since the gray scales of It and Is are not calibrated. (d) Gradient map of (c). The non-zero background is removed from the gradient operation, so only edges are reserved. (e) It − Is when two images are not aligned. (f) Gradient map of (e). The number of edge points is doubled compared with that in (d).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 29| Part 4| July 2022| Pages 1085-1094
https://doi.org/10.1107/S1600577522005598
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