317 research outputs found
Large scale evaluations of multimedia information retrieval: the TRECVid experience
Information Retrieval is a supporting technique which underpins a broad range of content-based applications including retrieval, filtering, summarisation, browsing, classification, clustering, automatic linking, and others. Multimedia information retrieval (MMIR) represents those applications when applied to multimedia information such as image, video, music, etc. In this presentation and extended abstract we are primarily concerned with MMIR as applied to information in digital video format. We begin with a brief overview of large scale evaluations of IR tasks in areas such as text, image and music, just to illustrate that this phenomenon is not just restricted to MMIR on video. The main contribution, however, is a set of pointers and a summarisation of the work done as part of TRECVid, the annual benchmarking exercise for video retrieval tasks
Third International Workshop on Gamification for Information Retrieval (GamifIR'16)
Stronger engagement and greater participation is often crucial
to reach a goal or to solve an issue. Issues like the emerging
employee engagement crisis, insufficient knowledge sharing,
and chronic procrastination. In many cases we need and
search for tools to beat procrastination or to change people’s
habits. Gamification is the approach to learn from often fun,
creative and engaging games. In principle, it is about understanding
games and applying game design elements in a
non-gaming environments. This offers possibilities for wide
area improvements. For example more accurate work, better
retention rates and more cost effective solutions by relating
motivations for participating as more intrinsic than conventional
methods. In the context of Information Retrieval (IR)
it is not hard to imagine that many tasks could benefit from
gamification techniques. Besides several manual annotation
tasks of data sets for IR research, user participation is important
in order to gather implicit or even explicit feedback
to feed the algorithms. Gamification, however, comes with
its own challenges and its adoption in IR is still in its infancy.
Given the enormous response to the first and second
GamifIR workshops that were both co-located with ECIR,
and the broad range of topics discussed, we now organized
the third workshop at SIGIR 2016 to address a range of
emerging challenges and opportunities
The accessibility dimension for structured document retrieval
Structured document retrieval aims at retrieving the document components that best satisfy a query, instead of merely retrieving pre-defined document units. This paper reports on an investigation of a tf-idf-acc approach, where tf and idf are the classical term frequency and inverse document frequency, and acc, a new parameter called accessibility, that captures the structure of documents. The tf-idf-acc approach is defined using a probabilistic relational algebra. To investigate the retrieval quality and estimate the acc values, we developed a method that automatically constructs diverse test collections of structured documents from a standard test collection, with which experiments were carried out. The analysis of the experiments provides estimates of the acc values
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