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System and method for automatically registering an image to a three-dimensional point set

  • US 9,269,145 B2
  • Filed: 10/22/2013
  • Issued: 02/23/2016
  • Est. Priority Date: 10/23/2012
  • Status: Active Grant
First Claim
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1. A system for producing a synthetic image from three-dimensional data set that includes a plurality of three-dimensional data points, the system comprising processing circuitry arranged to:

  • assign to each three-dimensional data point an intensity that is proportional to a dot product of a sun vector angle and a surface local unit normal vector at the three-dimensional data point;

    cast shadows and modify the assigned intensity values via an atmospheric scattering model;

    perform a correlation process at a grid of points between projected surface shaded relief and electro-optical images to generate a grid of correlated point locations;

    compare correlation quality metrics for each correlated point location in the grid to specified thresholds; and

    retain the correlated point locations in the grid that exceed the specified thresholds.

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