Motion enabled multi-frame challenge-response test
US8893034B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 27, 2010 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Jan 27, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2133
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for generating a multi-frame image rendering of a challenge-response test on a display is presented. The method begins by identifying a pattern with graphical elements, and a display region for rendering an entry object of the multi-frame image of the challenge-response test. Then a foreground sampling window having a non-patterned area defined by the entry object is defined. The foreground sampling window captures graphical elements of the pattern along a first path. In addition, a background sampling window that captures graphical elements of the pattern along a second path is defined. The foreground sampling window is overlaid on the background sampling window at the display region of the display, such that the entry object of the challenge-response test is discernable from the pattern during a period of time when multiple frames are rendered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.