@conference {, title = {Face likelihood functions for visual tracking in intelligent spaces}, booktitle = {IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics SocietyIECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society}, year = {2013}, month = {11/2013}, pages = {7825 - 7830}, publisher = {IEEE}, organization = {IEEE}, address = {Vienna, Austria}, doi = {10.1109/IECON.2013.6700440}, attachments = {https://geintra-uah.org/en/system/files/2013-iecon-franksanabria-facelikelihoodfunctions.pdf}, author = {Frank Sanabria-Macias and Enrique Mara{\~n}{\'o}n-Reyes and Soto-Vega, Pedro and Marta Marron and Javier Macias-Guarasa and Daniel Pizarro} }