Active brightness-based strategy for invalidating pixels in time-of-flight depth-sensing
US10557921B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2017 |
| Grant date | Feb 11, 2020 |
| Priority date | — |
| Expiry date | Jan 5, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/894
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A computer-implemented technique is described herein for invalidating pixels in a time-of-flight depth-sensing device based on active brightness (AB) measurements. In one implementation, the technique involves, for each sensing element of a sensor: generating frequency-specific sensor readings in response to receiving instances of radiation having plural frequencies (e.g., frequencies f1, f2, and f3); generating a set of active brightness measurements (ABf1, ABf2, and ABf3) associated with the respective frequencies; generating a variation measure that reflects an extent of variation within the set of active brightness measurements; and invalidating a pixel associated with the particular sensing element if the variation measure satisfies a prescribed invalidation condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.