Evaluating existing audio CAPTCHAs and an interface optimized for non-visual use.

Jeffrey P. Bigham Anna Cavender

Published in: CHI (2009)

Keyphrases

visual information
visual data
cross modal
visual features
user friendly
color coded
visual feedback
low level
user interface
visual query language
visual cues
audio visual
multi modal
hidden markov models
e learning
neural network
signal processing
multimedia
semantic context
data sets
real time