TagCaptcha: annotating images with CAPTCHAs.

Donn Morrison Stéphane Marchand-Maillet Eric Bruno

Published in: KDD Workshop on Human Computation (2009)

Keyphrases

image data
image database
image retrieval
image analysis
ground truth
three dimensional
input image
image classification
image features
object recognition
satellite images
image understanding
image regions
image matching
test images
image set
aerial images
automatic annotation
content based retrieval
image processing algorithms
image registration
image annotation
computer graphics
pixel values
multiple images
edge detection
feature extraction
computer programs
image processing