Scannerless range imaging system having high dynamic range
US6707054B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 21, 2002 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | Mar 21, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2209/045
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A scannerless range imaging system includes an illumination system for illuminating a scene with modulated illumination of a predetermined modulation frequency, and an image intensifier receiving reflected modulated illumination and including a modulating stage for modulating the reflected modulated illumination from the scene with the predetermined modulation frequency. An image responsive element includes an array of individual pixels for capturing images output by the image intensifier, whereby the modulation of the reflected modulated illumination incorporates a phase delay corresponding to the distance of objects in the scene from the range imaging system. A transmittance filter, including a plurality of filter elements having a spatially varying pattern of transmittance, are arranged in a one-to-one mapping with respect to the pixels forming the image responsive element. The spatially varying pattern of transmittance provides a plurality of separate exposures which are subsequently combined to form an output image with an expanded dynamic range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.