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Figure 1
A diffraction image from data set 1 is shown using dials.image_viewer. The four quads have independent geometry, such that they are not forced to align on a single pixel grid. The upper inset panel shows a zoomed region of the upper left quad where a clear row of diffraction spots is visible. The middle inset panel shows the `threshold' image with default spot-finding settings, which indicates which pixels will be marked as strong during the spot-finding procedure. The lower inset panel shows the same region after spot-finding settings were adjusted for this data set. In this case, this amounted to setting gain=0.833, sigma_strong=1.0 and global_threshold=1 as command-line options for the dials.find_spots program. The detector gain of 3.0 determined by the format class is already applied before the spot-finding operation; hence the spot-finding gain acts as a multiplier for this value.

Journal logoSTRUCTURAL
ISSN: 2059-7983
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