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An Image-Based CAPTCHA Scheme Exploiting Human Appearance Characteristics.
Sajida Kalsoom
Sheikh Ziauddin
Abdul Rehman Abbasi
Published in:
KSII Trans. Internet Inf. Syst. (2012)
Keyphrases
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human subjects
computer vision
appearance model
real time
computational models
human interaction
detection scheme
spatial structure
appearance modeling
appearance cues
social networks
bounding box
recognition scheme
human body parts