公开(公告)号：US11002856B2

公开(公告)日：2021-05-11

申请号：US15739854

申请日：2016-08-05

Applicant: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY ,  UNIVERSITY OF BRITISH COLUMBIA ,  STANFORD UNIVERSITY ,  BONN UNIVERSITY

Inventor： Wolfgang Heidrich ,  Felix Heide ,  Gordon Wetzstein ,  Matthias Hullin

IPC: G01S17/89 ,  G01S17/58 ,  G01S17/34 ,  G01S7/4911

Abstract: Systems and methods for imaging object velocity are provided. In an embodiment, at least one Time-of-Flight camera is used to capture a signal representative of an object in motion over an exposure time. Illumination and modulation frequency of the captured motion are coded within the exposure time. A change of illumination frequency is mapped to measured pixel intensities of the captured motion within the exposure time, and information about a Doppler shift in the illumination frequency is extracted to obtain a measurement of instantaneous per pixel velocity of the object in motion. The radial velocity information of the object in motion can be simultaneously captured for each pixel captured within the exposure time. In one or more aspects, the illumination frequency can be coded orthogonal to the modulation frequency of the captured motion. The change of illumination frequency can correspond to radial object velocity.

公开(公告)号：US20190154834A1

公开(公告)日：2019-05-23

申请号：US15739854

申请日：2016-08-05

Applicant: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY ,  UNIVERSITY OF BRITISH COLUMBIA ,  STANFORD UNIVERSITY ,  BONN UNIVERSITY

Inventor： Wolfgang HEIDRICH ,  Felix HEIDE ,  Gordon WETZSTEIN ,  Matthias HULLIN

IPC: G01S17/89 ,  G01S17/58 ,  G01S7/491

Abstract: Systems and methods for imaging object velocity are provided. In an embodiment, at least one Time-of-Flight camera is used to capture a signal representative of an object in motion over an exposure time. Illumination and modulation frequency of the captured motion are coded within the exposure time. A change of illumination frequency is mapped to measured pixel intensities of the captured motion within the exposure time, and information about a Doppler shift in the illumination frequency is extracted to obtain a measurement of instantaneous per pixel velocity of the object in motion. The radial velocity information of the object in motion can be simultaneously captured for each pixel captured within the exposure time. In one or more aspects, the illumination frequency can be coded orthogonal to the modulation frequency of the captured motion. The change of illumination frequency can correspond to radial object velocity.