3595 search results - page 3 / 719 » Image Recognition CAPTCHAs |
CVPR
2004
IEEE
14 years 6 months ago
2004
IEEE
Abstract-- This paper describes two distortion estimation techniques for object recognition that solve EZ-Gimpy and Gimpy-r, two of the visual CAPTCHAs ("Completely Automated ...
ICMCS
2006
IEEE
13 years 10 months ago
2006
IEEE
In this paper, a CAPTCHA is presented based on the masking characteristics of the Human Visual System (HVS). Knowing that noise can be masked by high activity regions and showing ...
NIPS
2008
13 years 6 months ago
2008
CAPTCHAs are computer-generated tests that humans can pass but current computer systems cannot. CAPTCHAs provide a method for automatically distinguishing a human from a computer ...
SP
2010
IEEE
13 years 8 months ago
2010
IEEE
—Captchas are designed to be easy for humans but hard for machines. However, most recent research has focused only on making them hard for machines. In this paper, we present wha...
CORR
2011
Springer
12 years 8 months ago
2011
Springer
- Vulnerabilities related to weak passwords are a pressing global economic and security issue. We report a novel, simple, and effective approach to address the weak password probl...