A Survey on 3D Visual Tracking of Multicopters (vol 16, pg 707, 2019)

The article A Survey on 3D Visual Tracking of Multicopters, written by Qiang Fu, Xiang-Yang Chen, Wei He, was originally published Online First without Open Access. After publication online first, the author decided to opt for Open Choice and to make the article an Open Access publication. Therefore, the copyright of the article has been changed to © The Author(s) 2019 and the article is forthwith distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, duplication, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.