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Koen Deschacht

dblp:53/1444 · DBLP profile ↗
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7ranked-venue papers
4as first author
0since 2021 · last 2013
—ORCID · none

Domains — the database's venue-derived domains; a paper can count in several

Artificial intelligence and machine learning · 4 · 3 first-authorGraphics, computer vision, multimedia, augmented reality and games · 3Databases, data management, data science and information retrieval · 1 · 1 first-author

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Databases, data mining, and information retrieval
1 paper
Information retrieval · 100%
Artificial intelligence
2 papers
Information extraction and text analysis · 77% Learning paradigms · 23%

Topics — the 4 heaviest of 4, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Natural language and speech › Information extraction and text analysis
semantic role labeling
0.112009
Semi-supervised Semantic Role Labeling Using the Latent Words Language Model · EMNLP 2009
Information retrieval › multimedia analysis and retrieval › image annotation
automatic image annotation
0.112007
Text Analysis for Automatic Image Annotation · ACL 2007
Information retrieval › multimedia analysis and retrieval
image annotation
0.112007
Text Analysis for Automatic Image Annotation · ACL 2007
Machine learning › Learning paradigms
semi-supervised learning
0.012009
Semi-supervised Semantic Role Labeling Using the Latent Words Language Model · EMNLP 2009

Methods — techniques the papers use, named apart from their topics

latent words language model · 0.1
YearPublicationVenuePosition
2013 Naming persons in video: Using the weak supervision of textual stories
Phi The Pham, Koen Deschacht, Tinne Tuytelaars, Marie-Francine Moens
J. Vis. Commun. Image Represent.2
2012 The latent words language model
Koen Deschacht, Jan De Belder, Marie-Francine Moens
Comput. Speech Lang.1
2010 Automatic annotation of unique locations from video and text
abstract
Given a video and associated text, we propose an automatic annotation scheme in which we employ a latent topic model to generate topic distributions from weighted text and then modify these distributions based on visual similarity. We apply this scheme to location annotation of a television series for which transcripts are available. The topic distributions allow us to avoid explicit classification, which is useful in cases where the exact number of locations is unknown. Moreover, many locations are unique to a single episode, making it impossible to obtain representative training data for a supervised approach. Our method first segments the episode into scenes by fusing cues from both images and text. We then assign location-oriented weights to the text and generate topic distributions for each scene using Latent Dirichlet Allocation. Finally, we update the topic distributions using the distributions of visually similar scenes. We formulate our visual similarity between scenes as an Earth Mover's Distance problem. We quantitatively validate our multi-modal approach to segmentation and qualitatively evaluate the resulting location annotations. Our results demonstrate that we are able to generate accurate annotations, even for locations only seen in a single episode. © 2010. The copyright of this document resides with its authors.
Chris Engels, Koen Deschacht, Jan Hendrik Becker, Tinne Tuytelaars, Marie-Francine Moens, Luc Van Gool
BMVC2
2010 News story segmentation in multiple modalities
Gert-Jan Poulisse, Marie-Francine Moens, Tomas Dekens, Koen Deschacht
Multim. Tools Appl.4
2009 Semi-supervised Semantic Role Labeling Using the Latent Words Language Model
Koen Deschacht, Marie-Francine Moens
EMNLP1
2008 Finding the Best Picture: Cross-Media Retrieval of Content
Koen Deschacht, Marie-Francine Moens
ECIR1
2007 Text Analysis for Automatic Image Annotation
Koen Deschacht, Marie-Francine Moens
ACL1