There is an error in the first sentence of the Evaluation Metrics subsection of the Experiments section. The correct sentence is: As accuracy measures, we adopt the metrics proposed in  and extended in : we consider a group as correctly estimated if at least ⌈(T ⋅ ∣G∣)⌉ of their members are found by the grouping method and correctly detected by the tracker, and if no more than (1−T) ⋅ ∣G∣ false subjects (of the detected tracks) are identified, where ∣G∣ is the cardinality of the labelled group G, and T Є [0,1] is an arbitrary threshold, called tolerance threshold.
Citation: Setti F, Russell C, Bassetti C, Cristani M (2015) Correction: F-Formation Detection: Individuating Free-Standing Conversational Groups in Images. PLoS ONE 10(9): e0139160. https://doi.org/10.1371/journal.pone.0139160
Published: September 22, 2015
Copyright: © 2015 Setti et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited