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Figure 5
Example of a dot-grid calibration image and distortion correction. (a) The dot pattern image used for registration and distortion correction is shown before post-processing. The grid was placed on the 150:40 mm fiber taper. The dots are 1 mm in diameter, with 2 mm center separation. The area in the red box is shown in an exploded view on the right, demonstrating the spatial distortion, as the dots deviate from a linear arrangement. (b) A difference image from the first and second cameras compares the images before correction, displaying the difference in magnification, translation, and rotation. (c) The image from camera 1 is shown after post-processing, displaying the restoration of a linear arrangement of the dots after the spatial transformation. (d) The difference image between camera 1 and camera 2 is shown after post-processing, showing no difference in alignment or scaling.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 28| Part 4| July 2021| Pages 1216-1228
https://doi.org/10.1107/S1600577521003775
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