Photographic copy prevention of a screen image
US9672373B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2016 |
| Grant date | Jun 6, 2017 |
| Priority date | — |
| Expiry date | Mar 16, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for preventing photographic capture of a displayed image on an electronically controlled screen using a photographic capture device is provided. The method includes intercepting an image for display; generating a plurality of subset frames based on the intercepted image; dividing the intercepted image into a plurality of subsections; generating a pseudo random number on each of the subsections within the plurality of subsections using a pseudo random number generator; mapping, on each of the subset frames within the plurality of subset frames, a group of subsections within the plurality of subsections that share a common generated pseudo random number; determining a frame rate value for displaying the plurality of subset frames, which enables human visualization of the plurality of subset frames as a single perceived frame; and displaying each subset frame consecutively on the electronically controlled screen based on the determined frame rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.