Distortion Estimation Techniques in Solving Visual CAPTCHAs.

Gabriel Moy Nathan Jones Curt Harkless Randall Potter

Published in: CVPR (2) (2004)

Keyphrases

visual features
estimation error
high level
visual information
low level
parameter estimation
estimation accuracy
learning algorithm
search algorithm
visual quality
estimation algorithm
distorted images
distortion correction
image retargeting
image rectification