*********************************************************** Advances in Multimedia Journal, Hindawi Special issue on “Multimedia Semantics Analysis via Crowdsourcing Geocontext” http://www.hindawi.com/journals/am/si/mscg/ Submission deadline: October 1, 2011 Publication Date April 1, 2012 *********************************************************** Overview In recent years, knowledge implicitly shared by crowds on the web has been extensively discovered to facilitate a wide variety of multimedia applications, such as multimedia information retrieval, recommendation, tagging, and object detection and recognition. As social networking websites (e.g., Facebook, Myspace) and photo/video sharing websites (e.g., Flickr, YouTube) are widely flourishing, researchers conduct social media analysis with rich contextual information such as image/video tags, user's tagging behaviors, multidisciplinary correlation, and viewer ratings. However, among much contextual information, relatively fewer studies have paid attention to seamlessly consider geographical information into social media analysis. By considering absolute/relative geographical locations of objects or users from regions with culture difference, semantics conveyed in multimedia may be more accurately explored or more appropriately presented. The so-called geocontext generally includes information conveying geographical information, such as geo-tag, map, Google street-view data, GPS information, user's locations (in terms of GPS information, IP address, or the country/region/community a person comes from), and the relative position to a specific object. Utilizing such information in multimedia semantic analysis may benefit location-based multimedia services, object detection/recognition, location-aware augmented reality, media description/presentation with cultural/region difference, or many other exciting researches. In addition, as geocontext is actively or passively shared by users, ethical and privacy issues also arise in related studies. Topics This special issue seeks high quality and original research and review articles targeting multimedia semantic analysis based on geocontext shared on the web or collected from crowds. Manuscripts are solicited to address a wide range of social media analysis with geocontext. Potential topics include, but are not limited to: * Geo-aware social media tagging and annotation * Geo-aware multimedia information retrieval * Geo-aware object detection and recognition * Geo-aware multimedia visualization * Location-based multimedia services * Learning media semantics from geocontext * User behavior analysis and cultural/region difference * Knowledge discovery for web community * User interaction for geo-aware multimedia retrieval * Large geocontext corpora * Privacy and security in geocontext Submission Procedures and Guidelines Before submission authors should carefully read over the journal's Author Guidelines, which are located at http://www.hindawi.com/journals/am/guidelines/. Prospective authors should submit an electronic copy of their complete manuscript through the journal Manuscript Tracking System at http://mts.hindawi.com/ according to the following timetable: Important Dates Manuscript Due October 1, 2011 First Round of Reviews January 1, 2012 Publication Date April 1, 2012 Guest Editors Wei-Ta Chu, National Chung Cheng University, Taiwan (wtchu@cs.ccu.edu.tw) Wen-Huang Cheng, Academia Sinica, Taiwan (whcheng@citi.sinica.edu.tw) Gamhewage Chaminda De Silva, The University of Tokyo, Japan (chamds@hal.t.u-tokyo.ac.jp) Dhiraj Joshi, Kodak Research Labs, USA (dhiraj.joshi@kodak.com)