Active learning is a machine learning technique that selects the most informative samples for
labeling and uses them as training data. It has been widely explored in multimedia research …

This book is a second edition, updated and expanded to explain the technologies that help
us find information on the web. Search engines and web navigation tools have become …

The emergence of Web 2.0 and the consequent success of social network Web sites such as
Del. icio. us and Flickr introduce us to a new concept called social bookmarking, or tagging …

Landscape scenery is inherently difficult to conceptualize because of its perceptual nature.
Yet landscapes are an extremely important resource for tourism and quality of life so there is …

In this chapter we provide a comprehensive overview of the emerging field of visualising and
browsing image databases. We start with a brief introduction to content-based image …

The plethora of social actions and annotations (tags, comments, ratings) from online media
sharing Websites and collaborative games have induced a paradigm shift in the research on …

Information retrieval systems, especially those accessed over the Internet, are ubiquitous in
our globalizing world. Many are wonderfully easy to use, and it is therefore easy to assume …

In large-scale media-sharing social networks, where millions of users create, share, link and
reuse media content, there are clear challenges in protecting content security and …

Tags have been demonstrated to be effective and efficient for organizing and searching
social image content. However, these human-provided keywords are far from a …

The emergence of large-scale social Web communities has enabled users to share online
vast amounts of multimedia content. An analysis of YouTube reveals a high amount of …