ABSTRACT
The present day is characterized by the ability to directly access a huge volume of any kind of information, especially through the Internet. Furthermore, an expansion of the online multimedia sharing communities and social network services, which enable users to interact with each other, as well as to upload, create and share multimedia content, such as images, videos and audio, has been observed in the last few years. This has led to an enormous increase in the volume of the on-line available multimedia data. The effective handling of information at such scales requires the development of special algorithms.
