Paper published in the Proceedings of the 2010 Symposium on Eye Tracking Research & Applications (ETRA 2010)
Location: Austin, TX, USA
Date: Mar. 2010
DOI Bookmark: 10.1145/1743666.1743670
Dan Witzner Hansen, IT University of Copenhagen
Javier San Agustin, IT University of Copenhagen
Arantxa Villanueva, IT University Copenhagen
Homography normalization is presented as a novel gaze estimation method for uncalibrated setups. The method applies when head movements are present but without any requirements to camera calibration or geometric calibration. The method is geometrically and empirically demonstrated to be robust to head pose changes and despite being less constrained than cross-ratio methods, it consistently performs favorably by several degrees on both simulated data and data from physical setups. The physical setups include the use of off-the-shelf web cameras with infrared light (night vision) and standard cameras with and without infrared light. The benefits of homography normalization and uncalibrated setups in general are also demonstrated through obtaining gaze estimates (in the visible spectrum) using only the screen reflections on the cornea.