Imaging system with multiple sensors for producing high-dynamic-range images
US8803990B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 2011 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | Feb 19, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/41
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electronic device may have an array of image sensors that capture image data using different exposure times. Processing circuitry may be used to combine image data with a first exposure time and image data with a second exposure time to create a high-dynamic-range image. The image sensors may use electronic rolling shutter and global shutter image capture schemes. Using the electronic rolling shutter scheme, the reset signals for each sensor may be staggered and the read signals for each sensor may be aligned to allow synchronized readout from the image sensors. When using the global shutter scheme, image capture operations associated with a shorter exposure time may be centered in time within image capture operation associated with a longer exposure time to minimize motion artifacts. Multiple image sensors may also be used to capture short-exposure-time data that is spaced evenly in time within the longer exposure time data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.