RT Conference Proceedings
T1 VITALAS at TRECVID-2009
A1 Diou, Christos
A1 Stephanopoulos, George
A1 Dimitriou, Nikos
A1 Panagiotopoulos, Panagiotis
A1 Papachristou, Christos
A1 Delopoulos, Anastasios
A1 Rode, Henning
A1 Tsikrika, Theodora
A1 de Vries, Arjen P.
A1 Schneider, Daniel
A1 Schwenninger, Jochen
A1 Viaud, Marie Luce
A1 Saulnier, Agnès
A1 Altendorf, Peter
A1 Schröter, Birgit
A1 Elser, Matthias
A1 Rego, Angel
A1 Rodriguez, Alex
A1 Martínez, Cristina
A1 Etxaniz, Iñaki
A1 Dupont, Gérard
A1 Grilhères, Bruno
A1 Martin, Nicolas
A1 Boujemaa, Nozha
A1 Joly, Alexis
A1 Enficiaud, Raffi
A1 Verroust, Anne
A1 Selmi, Souheil
A1 Khadhraoui, Mondher
AB This paper describes the participation of VITALAS in the TRECVID-2009 evaluation where we submitted runs for the High-Level Feature Extraction (HLFE) and Interactive Search tasks. For the HLFE task, we focus on the evaluation of low-level feature sets and fusion methods. The runs employ multiple low-level features based on all available modalities (visual, audio and text) and the results show that use of such features improves the retrieval effectiveness significantly. We also use a concept score fusion approach that achieves good results with reduced low-level feature vector dimensionality. Furthermore, a weighting scheme is introduced for cluster assignment in the "bag-of-words" approach. Our runs achieved good performance compared to a baseline run and the submissions of other TRECVID-2009 participants. For the Interactive Search task, we focus on the evaluation of the integrated VITALAS system in order to gain insights into the use and effectiveness of the system's search function-alities on (the combination of) multiple modalities and study the behavior of two user groups: professional archivists and non-professional users. Our analysis indicates that both user groups submit about the same total number of queries and use the search functionalities in a similar way, but professional users save twice as many shots and examine shots deeper in the ranked retrieved list.The agreement between the TRECVID assessors and our users was quite low. In terms of the effectiveness of the different search modalities, similarity searches retrieve on average twice as many relevant shots as keyword searches, fused searches three times as many, while concept searches retrieve even up to five times as many relevant shots, indicating the benefits of the use of robust concept detectors in multimodal video retrieval.
YR 2009
FD 2009
LK https://hdl.handle.net/11556/4664
UL https://hdl.handle.net/11556/4664
LA eng
NO Diou , C , Stephanopoulos , G , Dimitriou , N , Panagiotopoulos , P , Papachristou , C , Delopoulos , A , Rode , H , Tsikrika , T , de Vries , A P , Schneider , D , Schwenninger , J , Viaud , M L , Saulnier , A , Altendorf , P , Schröter , B , Elser , M , Rego , A , Rodriguez , A , Martínez , C , Etxaniz , I , Dupont , G , Grilhères , B , Martin , N , Boujemaa , N , Joly , A , Enficiaud , R , Verroust , A , Selmi , S & Khadhraoui , M 2009 , ' VITALAS at TRECVID-2009 ' , Paper presented at TREC Video Retrieval Evaluation, TRECVID 2009 , Gaithersburg, MD , United States , 16/11/09 - 17/11/09 .
NO conference
DS TECNALIA Publications
RD 28 sept 2024