Dublin City University at CLEF 2004: Experiments with the ImageCLEF St Andrew's Collection

For the CLEF 2004 ImageCLEF St Andrew’s Collection task the Dublin City University group carried out three sets of experiments. We carried out standard cross-language information retrieval (CLIR) runs using topic translation using machine translation (MT), combination of this run with image matching results from the VIPER system, and a novel document rescoring approach based on automatic MT evaluation metrics. Our standard CLIR approaches works well in comparison on this task. Encouragingly combination with image matching lists can produce small positive changes in the overall retrieval output. However, rescoring using the MT evaluation metrics in their current form significantly reduces retrieval effectiveness.