Time based offset correction for imaging systems
US9930324B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2015 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | May 3, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/661
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for offset correction in an imaging system comprising acquiring image data representative of at least a portion of a frame of pixel intensity values from the detector array at two times with a shutter closed. The method includes determining an offset value function for individual pixels based on the image data acquired with the shutter closed. The method includes acquiring subsequent scene image data with the shutter open, and adjusting the scene image data relative to the flat field as predicted by the offset value function at the time the scene image data was acquired to correct for offset drift of the imaging system. In some embodiments, the imaging array is an infrared Focal Plane Array (IR FPA) in a thermal imaging camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.