Using visibility cameras to estimate atmospheric light extinction. - Nathan Graves; Shawn D. Newsam (WACV, 2011)

Visibility cameras: where and how to look. - Nathan Graves; Shawn D. Newsam (MAED@ACM Multimedia, 2012)

Camera-based visibility estimation: Incorporating multiple regions and unlabeled observations. - Nathan Graves; Shawn D. Newsam (Ecol. Informatics, 2014)