Image flip CAPTCHA.

M. Tariq Banday Nisar A. Shah

Published in: ISC Int. J. Inf. Secur. (2009)

Keyphrases

image data
single image
image analysis
input image
image features
image matching
multiscale
segmentation method
image classification
image regions
high resolution
edge detection
image collections
image content
image retrieval
image noise
pixel values
template matching
grey level
image representation
spatial information
image segmentation
feature points
low level
similarity measure
keypoints
vector field
natural images
aerial images
image sequences