DeepCAPTCHA: an image CAPTCHA based on depth perception.

Hossein Nejati Ngai-Man Cheung Ricardo Sosa Dawn Chin-Ing Koh

Published in: MMSys (2014)

Keyphrases

depth perception
image data
input image
depth cues
image features
single image
image retrieval
single still image
image quality
image classification
post processing
depth estimation
low level
high level
image segmentation
ground truth
keypoints
lighting conditions
stereo vision
object boundaries
depth information
geometric constraints