@article{turner2016keypoint,
  title={Keypoint Density-based Region Proposal for Fine-Grained Object Detection and Classification using Regions with Convolutional Neural Network Features},
  author={Turner, JT and Gupta, Kalyan and Morris, Brendan and Aha, David W},
  journal={arXiv preprint arXiv:1603.00502},
  year={2016}
}