@article{ctraxextensionsfortrackingindifficult,
  title = {Ctrax extensions for tracking in difficult lighting conditions},
  author = {Ulrich Stern and Chung-Hui Yang},
  year = {2014},
  eprint = {1409.7272},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1409.7272v1},
}