TheconferenceonSemanticsAnddigital Media Technologies (SAMT) covers a wide scope of subjects that contribute, from di?erent perspectives, to n- row the large disparity between the low-level descriptors of multimedia content and the richness and subjectivity of semantics in user queries and human int- pretations of content: The Semantic Gap. The second international conference SAMT 2007 took place in Italy, in the beautiful town of Genova, and cont- ued to gather interest and high-quality papers from across Europe and beyond, bringing together forums, projects,institutions and individuals investigatingthe integrationofknowledge,semanticsandlow-levelmultimedia processing,incl- ing new emerging media and application areas. Inresponsetothecallforpapers,55papersweresubmitted.Afterathorough review process, only 16 contributions were accepted as full papers with oral presentation, in addition, 20 contributions were selected as short papers. We would like to thank all the members of the Technical Program Committee, the authors of submitted papers, and the additional reviewers for their e?orts in setting the quality of this volume. The conference program also includes two invited keynote talks from Ste?en Staab and Remco Veltkamp and we are very gratefulto themfortheir insightfulpresentations.This volumeincludes aspecial section with three awarded short papers from the K-Space PhD Workshop that took place in October 2007 in Berlin.