Camera for directly generating a gradient image
US7038185B1 · kind B1 · utility
50Cited by
2References
65Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2004 |
| Grant date | May 2, 2006 |
| Priority date | — |
| Expiry date | Dec 1, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A camera includes a set of sensing elements. Each sensing element is arranged at an image plane in an energy field to measure a magnitude and sign of a local gradient of the energy field. Each sensing element includes at least two energy intensity sensors. Each energy sensor measures a local intensity of the energy field. Logarithms of the intensities are subtracted from each other to obtain the magnitude and sign of the gradients. A Poisson equation is solved using the gradients to obtain an output image of the energy field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.