Indirect reflection suppression in depth imaging
US9729860B2 · kind B2 · utility
72Cited by
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20Claims
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Key dates
| Filing date | May 24, 2013 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Jan 14, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/2226
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A depth-sensing method for a time-of-flight depth camera includes irradiating a subject with pulsed light of spatially alternating bright and dark features, and receiving the pulsed light reflected back from the subject onto an array of pixels. At each pixel of the array, a signal is presented that depends on distance from the depth camera to the subject locus imaged onto that pixel. In this method, the subject is mapped based on the signal from pixels that image subject loci directly irradiated by the bright features, while omitting or weighting negatively the signal from pixels that image subject loci under the dark features.
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