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In this paper, two different approaches for designing image based CAPTCHAs are introduced. The first one _ which is called Tagging image CAPTCHA _ is based on ...
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Jul 11, 2012 · In this paper, first we introduce a new tagging image CAPTCHA using geometric transformations as a more complex method. Indeed, we consider a ...
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a new semantic image CAPTCHA using geometric transformations
www.semanticscholar.org › paper › SEI...
This paper presents an advanced CAPTCHA technique that essentially relies on employing the human recognition ability, which is not available in automated bots ...
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The first one-which is called Tagging image CAPTCHA-is based on pre-tagged images, using geometric transformations to increase security, and the second approach ...
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Recent years have seen a rapid growth of visual data produced by social media, large-scale surveillance cameras, biometrics sensors, and mass media content ...
![PDF] SEIMCHA: a new semantic image CAPTCHA using geometric ...](https://www.google.com/imgres?imgurl=https://ai2-s2-public.s3.amazonaws.com/figures/2017-08-08/632cc5fee944fffb6a51c2fa68f7f74bf4898d32/7-Table1-1.png&imgrefurl=https://www.semanticscholar.org/paper/SEIMCHA%253A-a-new-semantic-image-CAPTCHA-using-Mehrnejad-Bafghi/40c95ec497ca2c36a7354f4bc2a1882886b0b6e9&h=432&w=606&tbnid=ss2l2BGg67nsDM&q=SIMCHA:+a+new+semantic+image+CAPTCHA+using+geometric+transformations.&tbnh=97&tbnw=136&usg=AI4_-kTFF3vfrrKtfrE8b6jt_bkL7i00lg&vet=1&docid=FrLWXw56hIxLGM&itg=1&sa=X&ved=2ahUKEwi1zP3gwrGKAxVTlIkEHR8UMHgQ9QF6BAgLEAo)
![PDF] SEIMCHA: a new semantic image CAPTCHA using geometric ...](https://www.google.com/imgres?imgurl=https://ai2-s2-public.s3.amazonaws.com/figures/2017-08-08/632cc5fee944fffb6a51c2fa68f7f74bf4898d32/2-Figure1-1.png&imgrefurl=https://www.semanticscholar.org/paper/SEIMCHA%253A-a-new-semantic-image-CAPTCHA-using-Mehrnejad-Bafghi/40c95ec497ca2c36a7354f4bc2a1882886b0b6e9&h=484&w=566&tbnid=5XjLGfJLDxnSMM&q=SIMCHA:+a+new+semantic+image+CAPTCHA+using+geometric+transformations.&tbnh=115&tbnw=134&usg=AI4_-kSme1h2FWegYPuyrRfWFBLgFk5Afw&vet=1&docid=FrLWXw56hIxLGM&itg=1&sa=X&ved=2ahUKEwi1zP3gwrGKAxVTlIkEHR8UMHgQ9QF6BAgLEAw)
Dec 9, 2011 · We propose SEMAGE, a novel image-based CAPTCHA sys- tem, which has a two-factor model requiring the user to recognize the image and identify ...
Missing: SIMCHA: geometric transformations.
To facilitate images under the nonlinear geometric transformation T and its inverse transformation T(-1), we have developed numerical algorithms.
Missing: SIMCHA: semantic CAPTCHA
Apr 26, 2016 · There are plenty of posts on the web about using Mathematica to beat captchas via OCR and wavelet transforms, here is an example.
Missing: SIMCHA: semantic geometric
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