Editorial: Knowledge-based digital media processing

This Special Section presents work on integrative research aimed at low-level analysis, classification and semantic-based structuring of digital media. Most of the work presented in this section has originated in two large international cooperative projects funded by the European Commission under the sixth framework programme of the Information Society Technology: aceMedia and COST292. The mandate and scope of these two projects is very generic, embracing several applications that rely on technology for bridging the gap.