TRECVID 2004 Experiments in Dublin City University

In a move away from previous years' participation in TRECVid ((1) (2) (3)), this year our team focused on the instance search task (INS). We improved our system from last year by applying large vocabulary quantization, soft assignment of visual words, spatial verications and query expansion. Overall, four automatic runs have been submitted for evaluation. In this paper, we present rst our system, then we discuss the results and ndings of our experiments.

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