@inproceedings{ img-difficulty-CVPR-2016,
	author = {Radu Tudor Ionescu and Bogdan Alexe and Marius Leordeanu and Marius Popescu and Dim Papadopoulos and Vittorio Ferrari},
	title = "{How hard can it be? Estimating the difficulty of visual search in an image}",
	booktitle = {Proceedings of CVPR},
	month = {June},
	year = {2016},
	location = {Las Vegas, Nevada, US},
	pages = {2157--2166},
}