Generating Secure Images for CAPTCHAs through Noise Addition.

David Lorenzi Pratik Chattopadhyay Emre Uzun Jaideep Vaidya Shamik Sural Vijayalakshmi Atluri

Published in: SACMAT (2015)

Keyphrases

image classification
image features
image noise
image data
three dimensional
image analysis
image registration
image database
noise level
frequency domain
noise sensitivity
image degradation
high contrast
degraded images
gaussian noise
image structure
image collections
test images
ground truth
image retrieval
object recognition
multiscale