Patent ID: 8331688
Filing Date: 2012-12-11
Classification: G06T

Abstract:
1. A computer-implemented method comprising: retrieving a plurality of first pixels included in a first image that is captured using a first focal length; computing a first image perimeter color difference value for each of the plurality of first pixels, resulting in a plurality of first image perimeter color difference values, wherein, for each of the plurality of first pixels, the computing further comprises: selecting one of the plurality of first image perimeter color difference values that exceeds a perimeter color difference threshold; retrieving a plurality of second pixels included in a second image that is captured using a second focal length, the second focal length different than the first focal length; computing a second image perimeter color difference value for each of the plurality of second pixels, resulting in a plurality of second image perimeter color difference values; selecting one of the second image perimeter color difference values that exceeds the perimeter color difference threshold; determining that an edge is located at the first focal length by detecting that the selected first image perimeter color difference value is greater than the selected second image perimeter color difference value; and generating a model based upon determining that the edge is located at the first focal length.