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IRISA at MediaEval 2015: Search and Anchoring in Video Archives Task

Abstract

This paper presents our approach and results in the Search and Anchoring in Video Archives task at MediaEval, 2015. The Search part aims at returning a ranked list of video segments that are relevant to a textual user query. The Anchoring part focuses on identifying video segments that would encourage further exploration within the archive. A two step approach is implemented for both sub-tasks. The first step is common to both. This step consists in generating a list of potential anchor segments and response-query segments relying on a hierarchical topical structuring technique; In the second step, for each query, the best 20 segments are selected according to content based comparisons, while for the anchor detection sub-task, the segments are ranked based on a cohesion measure. The use of the hierarchical topical structure helps to propose segments of variable length at different levels of details with precise jump-in points for them. More, the algorithm deriving the structure relies on the burstiness phenomenon in word occurrences which gives an advantage over the classical bag-of-words model.
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Dates and versions

hal-01196176 , version 1 (09-09-2015)

Identifiers

  • HAL Id : hal-01196176 , version 1

Cite

Anca-Roxana Simon, Guillaume Gravier, Pascale Sébillot. IRISA at MediaEval 2015: Search and Anchoring in Video Archives Task. Working Notes Proceedings of the MediaEval Workshop, 2015, Wurzen, Germany. ⟨hal-01196176⟩
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