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Depth image acquisition apparatus and method of acquiring depth information

  • US 10,205,933 B2
  • Filed: 02/13/2015
  • Issued: 02/12/2019
  • Est. Priority Date: 08/29/2014
  • Status: Active Grant
First Claim
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1. A method of obtaining depth information, the method comprising:

  • sequentially projecting, to a subject, N different beams of light emitted from a light source for a time period comprising an exposure time and an idle time, subsequent to the exposure time, for each of the N different beams of light, where N is a natural number that is equal to or greater than 3;

    modulating, using a light modulation signal, beams of reflected light that are obtained by reflection of the N different beams of light from the subject;

    obtaining N phase images corresponding to the N different beams of light by capturing the modulated beams of reflected light with each scan line using a rolling shutter method during the exposure time; and

    obtaining depth information of the subject by using the obtained N phase images,wherein the idle time comprises a period of time equivalent to a readout time for all scan lines using the rolling shutter method.

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