Invention Grant
- Patent Title: Method for corrected depth measurement with a time-of-flight camera using amplitude-modulated continuous light
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Application No.: US17311225Application Date: 2019-12-03
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Publication No.: US11263765B2Publication Date: 2022-03-01
- Inventor: Bruno Mirbach , Harald Clos , Martin Boguslawski , Thomas Solignac
- Applicant: IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.
- Applicant Address: LU Echternach
- Assignee: IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.
- Current Assignee: IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.
- Current Assignee Address: LU Echternach
- Agency: Reising Ethington P.C.
- Priority: LU101024 20181204,LU101120 20190212
- International Application: PCT/EP2019/083538 WO 20191203
- International Announcement: WO2020/115068 WO 20200611
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G06T7/521 ; G06T7/80 ; G01S17/894 ; G01S7/491

Abstract:
A method for corrected depth measurement with a time-of-flight camera using amplitude-modulated continuous light. In order to enable an accurate and efficient depth measurement with a time-of-flight camera, the method includes, for each of a plurality of pixels of a sensor array of the camera: acquiring with the camera a raw depth value rm for the pixel; and automatically calculating a ground truth value rt according to: rt=g(rm−cm)+ct, to correct a systematic depth error of the raw depth value rm, wherein cm is a pixel-dependent first offset, g is a pixel-independent first function and ct is a pixel-independent second offset.
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