Systems and methods for mitigating image sensor pixel value clipping
US9287316B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 27, 2013 |
| Grant date | Mar 15, 2016 |
| Priority date | — |
| Expiry date | Jan 2, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/8063
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An imaging system may include image sensor pixels, converter circuitry, denoising circuitry, dark current subtraction circuitry, and storage and processing circuitry. The image sensor pixels may generate analog image signals and the converter circuitry may convert the analog image signals into digital pixel values. The denoising circuitry may generate denoised pixel values based on the digital pixel values. The dark current subtraction circuitry may subtract a dark current value from the denoised pixel values. The image sensor pixels and converter circuitry may generate pixel values in multiple color channels. The image sensor pixels may include clear color filter elements for generating clear pixel values. The storage and processing circuitry may determine different black pedestal values for each color channel and may add the black pedestal values to the pixel values from the corresponding color channel to mitigate pixel value clipping in a final image generated by the imaging system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.