Image processing apparatus, image processing method, and image capturing apparatus
US8421880B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2011 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Nov 17, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/745
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus includes: a difference calculation unit that calculates a difference value of a feature amount of image data of a predetermined region between a present frame and a past frame; a first counting unit that counts number of times when an absolute value of the difference value exceeds a threshold during a predetermined period of time; a second counting unit that counts number of times when the difference value of the image data have different plus-minus signs between a present frame and a past frame during a predetermined period of time; and an identification unit that identifies a light source frequency by comparing the output of the second counting unit with a predetermined value when the output of the first counting unit exceeds a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.