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Simulating an infrared emitter array in a video monitoring camera to construct a lookup table for depth determination

  • US 10,008,003 B2
  • Filed: 04/30/2017
  • Issued: 06/26/2018
  • Est. Priority Date: 06/12/2015
  • Status: Active Grant
First Claim
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1. A method of generating a lookup table for use in estimating spatial depth in a visual scene, comprising:

  • at an electronic system having one or more processors, and memory storing one or more programs configured for execution by the one or more processors;

    identifying a plurality of subsets of illuminators of a camera system that has a plurality of image sensors and a plurality of illuminators, wherein the plurality of image sensors are associated with a plurality of pixels;

    for each pixel, and for each of a plurality of depths from the pixel;

    simulating a virtual surface at the depth;

    for each subset of the plurality of subsets of illuminators,simulating illumination of the virtual surface from the subset; and

    determining an expected light intensity at the pixel from light reflected from the virtual surface due to the simulated illumination; and

    forming intensity information from the expected light intensity determined for the pixel for each of the depths and each of the subsets; and

    constructing a lookup table comprising the intensity information, wherein the lookup table associates the intensity information for each pixel with the respective depths and the respective subsets.

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