@article{jones_achieving_2009,
	title = {Achieving {Eye} {Contact} in a {One}-to-{Many} 3D {Video} {Teleconferencing} {System}},
	volume = {28},
	url = {http://ict.usc.edu/pubs/Achieving%20Eye%20Contact%20in%20a%20One-to-Many%203D%20Video%20Teleconferencing%20System.pdf},
	abstract = {We present a set of algorithms and an associated display system capable of producing correctly rendered eye contact between a three-dimensionally transmitted remote participant and a group of observers in a 3D teleconferencing system. The participant's face is scanned in 3D at 30Hz and transmitted in real time to an autostereo- scopic horizontal-parallax 3D display, displaying him or her over more than a 180â—¦ field of view observable to multiple observers. To render the geometry with correct perspective, we create a fast vertex shader based on a 6D lookup table for projecting 3D scene vertices to a range of subject angles, heights, and distances. We generalize the projection mathematics to arbitrarily shaped display surfaces, which allows us to employ a curved concave display surface to focus the high speed imagery to individual observers. To achieve two-way eye contact, we capture 2D video from a cross-polarized camera reflected to the position of the virtual participant's eyes, and display this 2D video feed on a large screen in front of the real par- ticipant, replicating the viewpoint of their virtual self. To achieve correct vertical perspective, we further leverage this image to track the position of each audience member's eyes, allowing the 3D dis- play to render correct vertical perspective for each of the viewers around the device. The result is a one-to-many 3D teleconferenc- ing system able to reproduce the effects of gaze, attention, and eye contact generally missing in traditional teleconferencing systems.},
	number = {3},
	journal = {ACM Transactions on Graphics (TOG) - Proceedings of ACM SIGGRAPH 2009},
	author = {Jones, Andrew and Lang, Magnus and Fyffe, Graham and Yu, Xueming and Busch, Jay and McDowall, Ian and Bolas, Mark and Debevec, Paul},
	month = aug,
	year = {2009},
	keywords = {Graphics, MxR}
}