2011

Techreport (elahmad2011robustness)
El Ahmad, A. S.; Yan, J. & Tayara, M.
The Robustness of Google CAPTCHAs
School of Computer Science, Newcastle University, UK, 2011

2010

Inproceedings (zhu2010attacks)
Zhu, B. B.; Yan, J.; Li, Q.; Yang, C.; Liu, J.; Xu, N.; Yi, M. & Cai, K.
Attacks and design of image recognition CAPTCHAs
ACM, 2010, 187-200

2008

Article (4563045)
Jesus, R.; Goncalves, D.; Abrantes, A. & Correia, N.
Playing games as a way to improve automatic image annotation
Computer Vision and Pattern Recognition Workshops, 2008. CVPR Workshops 2008. IEEE Computer Society Conference on, 2008, 1-8

Inproceedings (seneviratne2008image)
Seneviratne, L. & Izquierdo, E.
Simone, F. D.; Nemrava, J. & Bailer, W. (ed.)
Image Annotation Through Gaming
CEUR-WS, 2008

2007

Inproceedings (yan2007efficient)
Yan, R.; Natsev, A. & Campbell, M.
An efficient manual image annotation approach based on tagging and browsing
ACM, 2007, 13-20

2004

Inproceedings (985733)
von Ahn, L. & Dabbish, L.
Labeling images with a computer game
ACM, 2004, 319-326

1992

Book (lynch1992image)
Lynch, K.
The image of the city
MIT Press, 1992