Summary DescriptionAPI English: Short recording of a typical tracking session. The program tracks the location of the ant within a 40Ã40 pixels square centered around its location in the previous frame. Filtering and thresholding the background color yields a binary representation of this area, with white pixels corresponding to the ant and background speckles. A partition algorithm detects the largest spot, from which the centroid is extracted (red dot). Date 2013 Source Movie S2 from Khuong A, Lecheval V, Fournier R, Blanco S, Weitz S, Bezian J, Gautrais J (2013). "How Do Ants Make Sense of Gravity? A Boltzmann Walker Analysis of Lasius niger Trajectories on Various Inclines". PLOS ONE. DOI:10.1371/journal.pone.0076531. PMID24204636. Author Khuong A, Lecheval V, Fournier R, Blanco S, Weitz S, Bezian J, Gautrais J Permission (Reusing this file) This file is licensed under the Creative CommonsAttribution 2.5 Generic license. You are free: to share â to copy, distribute and transmit the work to remix â to adapt the work Under the following conditions: attribution â You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work). http://creativecommons.org/licenses/by/2.5 CC BY 2.5 Creative Commons Attribution 2.5 truetrue This file was published in a Public Library of Science journal. Their websitestates that the content of all PLOS journals is published under the Creative Commons Attribution 4.0 license (or its previous version depending on the publication date), unless indicated otherwise. Provenance This file was transferred to Wikimedia Commons from PubMed Central by way of the Open Access Media Importer.