%0 Journal Article %T On cross-correlations, averages and noise in electron microscopy %A Michael Radermacher %A Teresa Ruiz %J Archive of "Acta Crystallographica. Section F, Structural Biology Communications". %D 2019 %R 10.1107/S2053230X18014036 %K image processing %K signal-to-noise ratio %K cross-correlation %K multireference alignment %K 3D reference-based projection alignment %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6317458/