Method for flicker detection and associated circuit
US9686505B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2014 |
| Grant date | Jun 20, 2017 |
| Priority date | — |
| Expiry date | Jul 31, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for flicker detection based on a plurality of images and associated circuit is provided. The method includes providing an integrated flicker signal for each image, including accumulating pixel data of a number of pixels along each row; performing a motion compensation including: comparing two integrated flicker signals of two images, and accordingly providing a flicker signal difference; performing a flicker feature extraction including: applying a frequency analysis on the flicker signal difference, and accordingly providing a normalized flicker feature value; and performing a flicker determination, including: calculating a likelihood according to the normalized flicker feature value, and, according to the likelihood, determining whether a flicker-free hypothesis should be rejected in favor of a flicker-suffered hypothesis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.