Distortion estimation techniques in solving visual CAPTCHAs

Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition

Volumn 2, Issue , 2004, Pages

  Moy, Gabriel ^a   Jones, Nathan ^a   Harkless, Curt ^a   Potter, Randall ^a  

^a ARETÉ ASSOCIATES   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

DISTORTION ESTIMATION; HANDWRITING RECOGNITION; MAXIMUM LIKELIHOOD; MINIPATCHES;

ALGORITHMS; APPROXIMATION THEORY; COMPUTER PROGRAMMING; COMPUTER VISION; DATABASE SYSTEMS; MATRIX ALGEBRA; PARAMETER ESTIMATION; PROBLEM SOLVING;

OBJECT RECOGNITION;

EID: 5044232104     PISSN: 10636919     EISSN: None     Source Type: Conference Proceeding    
DOI: None     Document Type: Conference Paper

References (7)

1. L. von Ahn, M. Blum, N. J. Hopper, and I. Langford. The CAPTCHA Web Page: http://www.captcha.net.2000.
2. L. von Ahn, M. Blum, N. J. Hopper, and J. Langford. CAPTCHA: Using Hard AI Problems for Security. Advances in Cryptology: Eurocrypt 2003, May 2003.
3. S. Madhvanath and V. Govindaraju. The role of holistic paradigms in handwritten word recognition. IEEE Transactions on Pattern Analysis and Machine Intelligence, 23(2):149-164, February 2001.
4. G. Mon and J. Malik. Recognizing objects in adversarial clutter - breaking a visual captcha. Proceedings of the Conference on Computer Vision and Pattern Recognition, vol. 1, Madison, USA, pp. 134-141, June 2003.
5. R. Plamondon and S. N. Srihari. On-line and off-line handwriting recognition: A comprehensive survey. IEEE, Transactions on Pattern Analysis and Machine Intelligence, 22(1):63-84, January 2000.
6. F.W.M. Stentiford and R.G. Mortimer. Some New Heuristics for Thinning Binary Handprinted Characters for OCR. IEEE Transactions on Systems, Man, and Cybernetics, 13(1):81-84, January/February 1983.
7. A. Thayananthan, B. Stenger, P. H. S. Torr, and R. Cipolla. Shape Context and Chamfer Matching in Cluttered Scenes. Proceedings of the Conference on Computer Vision and Pattern Recognition, vol. 1, Madison, USA, pp. 127-133, June 2003.