Methods for motion correction for high-dynamic-range imaging systems
US8810663B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2011 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | Sep 5, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/741
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Electronic devices may include image sensors and processing circuitry. Image sensors may be used to capture multiple exposure images. Processing circuitry may be used to combine multiple exposure images into high-dynamic-range images. A motion correction method is provided that detects motion between multiple exposure images without using a frame buffer. A noise model is used to separate noise from motion for more accurate motion detection. A dilation operator may be used to enlarge a motion mask generated by the motion detector. Motion-corrected images may be generated from the multiple exposure images using a soft switch based on the motion strength. Motion-corrected multiple exposure images may be combined to generate a motion-corrected HDR image. A smoothing filter may be applied to the motion region of the motion-corrected HDR image. A blooming correction may be used to eliminate color artifacts in the motion-corrected HDR image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.