3595 search results - page 1 / 719 » Image Recognition CAPTCHAs |
ISW
2004
Springer
13 years 10 months ago
2004
Springer
CAPTCHAs are tests that distinguish humans from software robots in an online environment [3, 14, 7]. We propose and implement three CAPTCHAs based on naming images, distinguishing ...
HIP
2005
Springer
13 years 10 months ago
2005
Springer
Abstract. Current CAPTCHAs require users to solve objective questions such as text recognition or image recognition. We propose a class of CAPTCHAs based on collaborative filterin...
ACSAC
2010
IEEE
13 years 2 months ago
2010
IEEE
Many financial institutions have deployed CAPTCHAs to protect their services (e.g., e-banking) from automated attacks. In addition to CAPTCHAs for login, CAPTCHAs are also used to...
CVPR
2003
IEEE
14 years 6 months ago
2003
IEEE
In this paper we explore object recognition in clutter. We test our object recognition techniques on Gimpy and EZGimpy, examples of visual CAPTCHAs. A CAPTCHA ("Completely Au...
WWW
2009
ACM
14 years 5 months ago
2009
ACM
We present a new CAPTCHA which is based on identifying an image's upright orientation. This task requires analysis of the often complex contents of an image, a task which hum...