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System and method of estimating 3D facial geometry

  • US 9,836,846 B2
  • Filed: 06/19/2014
  • Issued: 12/05/2017
  • Est. Priority Date: 06/19/2013
  • Status: Expired due to Fees
First Claim
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1. A method of estimating a three-dimensional geometry of an object including:

  • acquiring a first plurality of images of an object;

    estimating a first three-dimensional (3D) geometry of the object based upon at least a subset of the first plurality of images,wherein estimating the first 3D geometry of the object comprises;

    estimating boundary edges of the object in the subset of the first plurality of images;

    detecting features of the object in the subset of the first plurality of images using a correlation filter;

    performing bundle adjustment across the subset of the first plurality of images for geometric consistency; and

    applying a Lambertian appearance constraint on the subset of the first plurality of images;

    acquiring a calibration image of both the object and a calibration rig, wherein the calibration rig has a known size, and the calibration rig and the object are in a predetermined spatial configuration;

    determining a scaling factor of the first 3D geometry based upon the calibration image, the known size of the calibration rig, and the predetermined spatial configuration; and

    scaling the first 3D geometry using the scaling factor.

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