Peter Faymonville, Kai Wang, John Miller, Serge J. Belongie. CAPTCHA-based image labeling on the Soylent Grid. In Paul N. Bennett, Raman Chandrasekar, Max Chickering, Panagiotis G. Ipeirotis, Edith Law, Anton Mityagin, Foster J. Provost, Luis von Ahn, editors, Proceedings of the ACM SIGKDD Workshop on Human Computation, Paris, France, June 28, 2009. pages 46-49, ACM, 2009. [doi]
Abstract is missing.