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High resolution dot pattern

  • US 10,225,544 B2
  • Filed: 11/17/2016
  • Issued: 03/05/2019
  • Est. Priority Date: 11/19/2015
  • Status: Active Grant
First Claim
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1. A three dimensional (3D) sensing system, comprising:

  • a light source for projecting a dot pattern with structured light illumination onto an object, the dot pattern comprising a plurality of dots distributed on a grid such that neighboring dots within a certain sub-window size are a unique sub-pattern of dots, wherein the neighboring dots within the certain sub-window size are arranged in a staggered grid format relative to one axis of grid and the dots are located on the grid with subpixel accuracy based on a difference of Gaussian (DOG) algorithm plus bicubic interpolation; and

    an image sensor for capturing an image of the object;

    wherein the system is configured to identify a location of the dots in the captured image and determine dimensions and/or a shape of the object.

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