CAPTCHaStar! A Novel CAPTCHA Based on Interactive Shape Discovery.

Mauro Conti Claudio Guarisco Riccardo Spolaor

Published in: ACNS (2016)

Keyphrases

shape features
shape descriptors
arbitrarily shaped
virtual reality
computer graphics
database
shape model
vector field
shape change
perceptual grouping
arbitrary shape
pattern discovery
knowledge discovery
learning environment
multiscale
three dimensional
data mining
databases