Image sensor, calculation method, and electronic device for autofocus
US10212332B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 2015 |
| Grant date | Feb 19, 2019 |
| Priority date | — |
| Expiry date | Jun 26, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/77
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure relates to an image sensor, calculation method, and electronic device that increase flexibility of the arrangement of light-shielded pixels and detect the phase difference with high precision. According to an aspect of the present disclosure, an image sensor includes: a pixel unit in which light-shielded pixels are arranged among normal pixels; a setting unit (texture determination unit) configured to determine texture around the light-shielded pixel as a pixel of interest present in a region of interest, and set a weighting coefficient on the basis of the texture; a calculation unit (correlation calculation unit) configured to calculate a correlation value between a pixel value of the light-shielded pixel and a pixel value of the normal pixel around the light-shielded pixel; and a generation unit (phase difference calculation unit) configured to generate a degree-of-correlation histogram. The present disclosure is applicable to an imaging apparatus with focal plane phase detection AF.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.