ACM multimedia conference & co-located workshops : MM'12 ; AVMA'12, CBMAS-EH'12, CEA'12, CrowdMM'12, GeoMM'12, IMMPD'12, MAED'12, MIRUM'12, PATCH'12, SAM'12, UXeLATE'12, proceedings, Nara, Japan, Oct.29-Nov.2, 2012 (ACM - Association for Computing Machinery, 2012)