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US 2010/0077210 A1Published application
Captcha image generation
AssigneeYahoo! Inc.
InventorsAndrei Broder, Shanmugasundaram Ravikumar
Life of this patent
Estimating the term…
Abstract
Methods and systems are described for generating captchas and enlarging a core of available captchas that are hard for an automated or robotic user to crack.
Claims16
A computer implemented method for generating a completely automated public turing test to tell computers and humans apart, comprising:
- creating a first image of an alphanumeric string;
- creating a randomly generated mask;
- and
- creating a second image of the alphanumeric string by superimposing the randomly generated mask on top of the first image.
1 more element
A computer system for generating test images to tell computers and humans apart, the computer system configured to:
- create a first image of an alphanumeric string;
- create a randomly generated mask;
- and
- create an additional image of the alphanumeric string by superimposing the randomly generated mask on top of the first image.
1 more element
Dependencies are inferred from the claim text.