view article
Figure 9
(a) Class averages randomly extracted from the total of 3000. High-contrast class averages are associated with good views of the worm haemoglobin, whereas low-contrast class averages are associated with atypical false-positive particle detections. (b) The histogram of standard deviations of 3000 class averages (205 764 particles) reveals a bimodal distribution in which virtually all remaining false positives land in low-contrast class averages.

IUCrJ
Volume 4| Part 5| September 2017| Pages 678-694
ISSN: 2052-2525
https://doi.org/10.1107/S2052252517010922