Automated contrast verifications
US8917275B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2010 |
| Grant date | Dec 23, 2014 |
| Priority date | — |
| Expiry date | Oct 29, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A developer tool is used to programmatically calculate the contrast between the text and background in a user interface. A luminosity ratio is automatically calculated by the tool by capturing an image of a user interface, archiving user interface elements that do not contain text, performing optical character recognition on the remaining user interface elements to find pixels on the text part of the user interface element and pixels on the background part of the user interface element, and finally calculating the luminosity ratio. Results including errors, warnings and luminosity ratio for one or more hotspots in the image can be returned. Results can be used to identify user interface elements that comply or fail to comply with visibility guidelines for contrast between user interface text and background.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.