Doppler time-of-flight imaging

Wolfgang Heidrich (Inventor), Felix Heide (Inventor), Gordon Wetzstein (Inventor), Matthias Hullin (Inventor)

Research output: Patent


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.
Original languageEnglish (US)
Patent numberWO 2017025885 A1
StatePublished - Feb 16 2017


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