Invention Grant
- Patent Title: Depth mapping using fringe interferometry
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Application No.: US15849783Application Date: 2017-12-21
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Publication No.: US10855973B1Publication Date: 2020-12-01
- Inventor: Michael Hall , Qing Chao
- Applicant: Facebook Technologies, LLC
- Applicant Address: US CA Menlo Park
- Assignee: Facebook Technologies, LLC
- Current Assignee: Facebook Technologies, LLC
- Current Assignee Address: US CA Menlo Park
- Agency: Fenwick & West LLP
- Main IPC: H04N13/271
- IPC: H04N13/271 ; H04N13/246 ; H04N13/254 ; H04N13/344 ; H04N13/366

Abstract:
A depth camera assembly (DCA) determines distances between the DCA and objects in a local area within a field of view of the DCA. The DCA projects a series of sinusoidal patterns into the local area DCA and captures images of the sinusoidal patterns via a sensor. The DCA determines a distance between the DCA and locations in the local area based on a phase shift each of the sinusoidal patterns captured by each pixel of the sensor. Initially, a calibration offset is determined for each pixel of the sensor by emitting the sinusoidal patterns onto a target at a predetermined distance from the DCA and using phase shifts for a pixel and the predetermined distance to determine the pixel's calibration offset.
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