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Distortion Estimation Techniques in Solving Visual CAPTCHAs
Washington, D.C., USA June 27-July 02
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/CVPR.2004.842004 IEEE Computer Society Conference ...
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Gabriel Moy, Nathan Jones, Curt Harkless, Randall Potter, "Distortion Estimation Techniques in Solving Visual CAPTCHAs," Computer Vision and Pattern Recognition, IEEE Computer Society Conference on, vol. 2, pp. 23-28, 2004 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'04) - Volume 2, 2004.
 
 
BibTex
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@article{ 10.1109/CVPR.2004.84,
author = {Gabriel Moy and Nathan Jones and Curt Harkless and Randall Potter},
title = {Distortion Estimation Techniques in Solving Visual CAPTCHAs},
journal ={Computer Vision and Pattern Recognition, IEEE Computer Society Conference on},
volume = {2},
year = {2004},
issn = {1063-6919},
pages = {23-28},
doi = {http://doi.ieeecomputersociety.org/10.1109/CVPR.2004.84},
publisher = {IEEE Computer Society},
address = {Los Alamitos, CA, USA},
}
 
 
RefWorks Procite/RefMan/Endnote
x 
 
TY - CONF
JO - Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
TI - Distortion Estimation Techniques in Solving Visual CAPTCHAs
SN - 1063-6919
SP23
EP28
A1 - Gabriel Moy,
A1 - Nathan Jones,
A1 - Curt Harkless,
A1 - Randall Potter,
PY - 2004
KW - null
VL - 2
JA - Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
ER -
 
Gabriel Moy, Areté Associates
Nathan Jones, Areté Associates
Curt Harkless, Areté Associates
Randall Potter, Areté Associates
This paper describes two distortion estimation techniques for object recognition that solve EZ-Gimpy and Gimpy-r, two of the visual CAPTCHAs ("Completely Automated Public Turing test to tell Computers and Humans Apart") with high degrees of success. A CAPTCHA is a program that generates and grades tests that most humans can pass but current computer programs cannot pass.We have developed a correlation algorithm that correctly identifies the word in an EZ-Gimpy challenge image 99% of the time and a direct distortion estimation algorithm that correctly identifies the four letters in a Gimpy-r challenge image 78% of the time.
Citation:
Gabriel Moy, Nathan Jones, Curt Harkless, Randall Potter, "Distortion Estimation Techniques in Solving Visual CAPTCHAs," cvpr, vol. 2, pp.23-28, 2004 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'04) - Volume 2, 2004
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