Computer Vision/Computer Graphics Collaboration Techniques : 4th International Conference

This volume collects the papers accepted for presentation atMIRAGE 2009. TheMIRAGE conference is continuing to receive international recognition, with this years presentations coming from 25 countries despite the large wor- wide ?nancial crisis. This time Asia submitted far fewer papers than previously and fewer than Europe. France provedto be the most active scienti?cally with a total of 16 submitted papers. Germany came second (10 submitted papers) and China third (8 papers). We received a total of 83 submissions and accepted 41 as oral presentations, over the three-day event. All papers were reviewed by three to four members of theProgramCommittee.The?nalselectionwasmadebytheConferenceChairs. At this point, we wish to thank the Program Committee and additional referees for their timely and high-quality reviews. We also thank the invited speakers Luc Van Gool, Frank Multon and Raquel Urtasun for kindly accepting to present very interesting talks. mirage 2009 was organizedbyinria Rocquencourt and took place atinria, Rocquencourt, close to Versailles. We believe that the conference proved to be a stimulating experience for all. March 2009 A. Gagalowicz W. Philips Organization Mirage 2009 was organized byinria and Ghent University.