Kumar Chellapilla, Kevin Larson, Patrice Y. Simard, Mary Czerwinski. Computers beat Humans at Single Character Recognition in Reading based Human Interaction Proofs (HIPs). In CEAS 2005 - Second Conference on Email and Anti-Spam, July 21-22, 2005, Stanford University, California, USA. 2005. [doi]
@inproceedings{ChellapillaLSC05:0, title = {Computers beat Humans at Single Character Recognition in Reading based Human Interaction Proofs (HIPs)}, author = {Kumar Chellapilla and Kevin Larson and Patrice Y. Simard and Mary Czerwinski}, year = {2005}, url = {http://www.ceas.cc/papers-2005/160.pdf}, tags = {rule-based, human-computer interaction}, researchr = {https://researchr.org/publication/ChellapillaLSC05%3A0}, cites = {0}, citedby = {0}, booktitle = {CEAS 2005 - Second Conference on Email and Anti-Spam, July 21-22, 2005, Stanford University, California, USA}, }