Palestra: Rede de Sensores sem fio para Monitorar o meio Ambiente.
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Palestra: Content-based indexing and retrieval in large collections of images and videos"
Palestra da Profª. Drª. Valerie Gouet-Brunet, na Série de Seminários 2008 da Pós-Graduação dia 22/08/2008, às 10h, no Auditório do IC - Sala 85 - IC 2.
| What | Palestra |
|---|---|
| When |
22/08/2008 from 10:00 to 12:00 |
| Where | Auditório do IC - Sala 85 - IC 2 |
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This presentation concerns content-based indexing and retrieval in large collections of images and videos, with applications to object recognition for visual surveillance and content-based video copy detection. We will begin with an introduction to the most popular content-based image and video descriptors, with a focus on local descriptors that are particularly suited for object recognition and copy detection applications. Then we will describe two recent and orthogonal approaches to improve this kind of description. The first work proposes to enrich these local features by adding semi-local or global visual contexts, with the aim of reducing some problems inherent to these descriptors. We will show that such a context leads to more robust object recognition and is more suitable to visual video surveillance. The second approach concerns the characterization of the temporal behavior of local descriptors in video sequences. We will demonstrate that tracking local features and indexing their behavior allow a more efficient detection of video copies, while reducing the volume of visual features to compute. The applications we are targeting require efficient access to high-dimensional data known to suffer from the so-called "curse of dimensionality" phenomenon. The presentation will also address this issue.
Concurso Público para Professor Doutor - MS-3
