TagCaptcha: Annotating images with CAPTCHAs

Bibtex entry :

@inproceedings { morrison2009:hcomp,
    author = { Morrison, Donn and Marchand-Maillet, St\'ephane and Bruno, Eric },
    title = { TagCaptcha: Annotating images with CAPTCHAs },
    booktitle = { Proceedings of the Human Computation Workshop (HCOMP2009) - co-located with ACM-KDD 2009 },
    year = { 2009 },
    address = { Paris, FR },
    month = { June 28th },
    url = { http://viper.unige.ch/documents/pdf/morrison2009-hcomp.pdf },
}
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Keywords: machine learning, information geometry, data mining, Big Data, affective information retrieval (recherche d'information), information visualisation, content-based image and video retrieval (CBIR, CBR, CBVR, CBMR, CBMIR), information mining, classification, multimedia and multimodal information management, semantic web, knowledge base (RDF, OWL, XML, metadata, auto-annotation, description), multimodal information fusion