Download Multilingual Information Access Evaluation II. Multimedia by Carol Peters (auth.), Carol Peters, Barbara Caputo, Julio PDF

By Carol Peters (auth.), Carol Peters, Barbara Caputo, Julio Gonzalo, Gareth J. F. Jones, Jayashree Kalpathy-Cramer, Henning Müller, Theodora Tsikrika (eds.)

The 10th crusade of the go Language assessment discussion board (CLEF) for eu languages used to be held from January to September 2009. there have been 8 major eval- tion tracks in CLEF 2009 plus a pilot activity. the purpose, as traditional, used to be to check the perfo- ance of a variety of multilingual info entry (MLIA) structures or method parts. This yr, approximately a hundred and fifty teams, mostly yet not just from academia, reg- tered to take part within the crusade. many of the teams have been from Europe yet there has been additionally an outstanding contingent from North the US and Asia. the consequences have been awarded at a two-and-a-half day workshop held in Corfu, Greece, September 30 to October 2, 2009, along with the ecu convention on electronic Libraries. The workshop, attended by way of a hundred and sixty researchers and method builders, supplied the chance for all of the teams that had participated within the overview crusade to occasion, examine ways and trade ideas.

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Extra resources for Multilingual Information Access Evaluation II. Multimedia Experiments: 10th Workshop of the Cross-Language Evaluation Forum, CLEF 2009, Corfu, Greece, September 30 - October 2, 2009, Revised Selected Papers

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76 vs. 79). 02 vs. 65). This can be explained again because the image collection was designed to force the multilingual searches. 93 vs. 26). Lastly, in general, users in failed sessions seems to have performed more interactions in the monolingual environment. As the last columns of the table show, the usage of relevance feedback was very low in both categories, being higher in monolingual in iCLEF08 and multilingual in iCLEF09. In general, but still with little differences, successful users tended to use relevance feedback more frequently.

Table 1. Ambiguity vs. 5 Fig. 1. 2, from a total of 4011. 3). 3). This fact does not depend exclusively on the ambiguity. Logically, an unambiguous query doesn’t always mean that the user correctly finds an image, or an ambiguous query imply that the user doesn’t find the image. 5% are not located. The reasons why an image is not located could be diverse: for example, cases where the user does not know the language of the image or the correct translation, or cases where the user does not use the words in the image caption.

We chose Flickr, a large-scale, web-based image database based on a large social network of WWW users sharing over two billion images, with the potential for offering both challenging and realistic multilingual search tasks for interactive experiments. Over the last years, iCLEF participants have typically designed one or more cross-language search interfaces for tasks such as document retrieval, question answering or text-based image retrieval. Experiments were hypothesis-driven, and interfaces were studied and compared using controlled user populations under laboratory conditions.

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