Method and circuit for detecting disappearance of logo pattern
US8897561B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2012 |
| Grant date | Nov 25, 2014 |
| Priority date | — |
| Expiry date | Feb 23, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V20/635
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Method for detecting disappearance of a pattern is used to detect whether a fixed-still pattern in dynamic displayed images disappears. Method includes analyzing a pattern characteristic parameter which represents the fixed-still pattern from each of images continuously displayed in a time sequence, It is checked whether the pattern characteristic parameter fast decreases from at least greater than a high level to at least less than a low level, as a first state transition. Sum of absolute difference (SAD) values for all of the pixels between a previous image and a current image is calculated. It is checked whether the sum of the SAD values fast increases from at least less than a low level to at least greater than a high level, as a second state transition. When the first state transition and the second state transition occur simultaneously, it is determined that the fixed-still pattern disappears in the display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.