Device and method for processing a histogram of arrival times in an optical sensor
US10796191B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 26, 2018 |
| Grant date | Oct 6, 2020 |
| Priority date | — |
| Expiry date | Jan 25, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30242
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An example device has optical emitters for emitting incident radiation within a field of view and optical detectors for receiving reflected radiation. Based on the incident radiation and the reflected radiation, a histogram indicative of a number of photon events that are detected by the optical detectors over time bins is generated. The time bins is indicative of time differences between emission of the incident radiation and reception of the reflected radiation. The device further includes; a processor programmed to iteratively process the histogram by executing an expectation-maximization algorithm to detect a presence of objects located in the field of view of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.