Emerging Image Game CAPTCHAs for Resisting Automated and Human-Solver Relay Attacks.

Song Gao Manar Mohamed Nitesh Saxena Chengcui Zhang

Published in: ACSAC (2015)

Keyphrases

image data
input image
single image
image content
image features
image retrieval
high resolution
multiscale
image analysis
image classification
image representation
image regions
template matching
static images
computer games
digital images
geometric distortions
watermarking technique
image pixels
region of interest
cooperative
edge detection
image processing
image collections
pixel values
watermarking algorithm
scale space
low level
visual attributes
blind watermarking