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154
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CCS
2010
ACM
15 years 4 months ago
2010
ACM
We systematically study the design of image recognition CAPTCHAs (IRCs) in this paper. We first review and examine all IRCs schemes known to us and evaluate each scheme against th...
125
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ICCV
2007
IEEE
16 years 5 months ago
2007
IEEE
121
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ICCV
2001
IEEE
16 years 5 months ago
2001
IEEE
ICCV
2001
IEEE
16 years 5 months ago
2001
IEEE
