Event-based vision sensor using on/off event and grayscale detection ramps
US11825229B2 · kind B2 · utility
2Cited by
1References
16Claims
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Key dates
| Filing date | May 8, 2020 |
| Grant date | Nov 21, 2023 |
| Priority date | — |
| Expiry date | Dec 5, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/79
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A dynamic vision sensor such as an event based vision sensor employs analog to digital converters (ADC), such as ramp ADCs, that analog to digital converts the signals from photoreceptors. Only previous light values need to be stored in the pixels. This is accomplished by generating three ramps. In addition, log compression can be implemented by increasing the count linearly while increasing the reference voltage exponentially, or increasing the count logarithmically while increasing the reference voltage linearly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.