@conference {cCanton-Ferrer06b, title = {Head Pose Detection based on Fusion of Multiple Viewpoint Information}, booktitle = {CLEAR{\textquoteright}06 Evaluation Campaign and Workshop - Classification of Events, Activities and Relationships}, year = {2006}, pages = {305{\textendash}310}, isbn = {978-3-540-69567-7}, author = {Cristian Canton-Ferrer and Casas, J. and M. Pard{\`a}s} }