- IEEE senior member (since 2011) and ACM senior member (since 2012).
- Editorial board member of Multimedia System Journal (2011-present).
- Editorial board member of SIGMM Records (2010-present).
- 2012: Program area co-chairs of ACM Multimedia'12, ICPR'12; Local co-chair of SIG KDD'12; PC members of CVPR'12, ICME'12, SIGIR'12, ECCV-VECTaR'12, ACM MM-GeoTagging'12.
- 2011: Co-editor of Neurocomputing Special Issue on Image Feature Detection and Description; Co-editor of special issue on Data Mining on Social Networks and Social Web at Journal of Computer Science and Technology; Program co-chairs of ISM'11 industry track, SIGIR'11 workshop on Social Web Search & Mining; Program track co-chair of ICME'11; PC members of ACM Multimedia'11, ICCV'11, ICCV-VECTaR'11, CVPR-HICV'11, SIGIR'11, ICMR'11, IJCAI'11.
- 2010: Program co-chair of MMM'10; PC members of ACM Multimedia'10, WWW'10, SIGIR'10, SIGKDD'10, WSDM'10; Panel co-organizer of VCIP'10 on Data everywhere: challenges and opportunities of unlimited data for multimedia content understanding.
- 2009: Program co-chair of International Workshop on Video Event Categorization, Tagging and Retrieval (VECTaR); Co-organizer of ICASSP'09 Special Session on
The data deluge: the challenges and opportunities of unlimited data in signal processing; PC members of ACM Multimedia'09, WWW'09, SIGIR'09; Panel co-organizer of ACM Multimedia'09 on Multimedia Content Analysis: Model-based Approaches vs. Data-driven Approaches.
- 2008: PC members of ACM Multimedia'08, WWW'08, SIGIR'08, CIVR'08, ICME'08; Publicity Chair of CIVR'08; Co-editor of Special Issue on Emerging Techniques for Multimedia Content Sharing, Search and Understanding at Journal of Visual Communication and Image Representation (JVCI).
- 2007: PC members of ACM Multimedia'07 (short paper) , SIGIR'07, ICME'07, MIRP'07, MMM'07, PCM'07, IJCAI-MIR'07, SIGMOD-CVDB'07.
- 2006: PC members of ACMMM-CARPE'06, MIPR'06, PCM'06, AIRS'06, MMM'06, SIGIR'06 (poster and demo).
- 2005: PC members of ACMMM-CARPE'05, MIPR'05, PCM'05, AIRS'05, PRIS'05.
- 2004: PC member of ICME'04, Session chair of ACCV'04.