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TRUE SPACE TRACKING OF AXISYMMETRIC OBJECT FLIGHT USING DIAMETER MEASUREMENT

  • US 20140301598A1
  • Filed: 06/18/2013
  • Published: 10/09/2014
  • Est. Priority Date: 04/03/2013
  • Status: Active Grant
First Claim
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1. A non-transitory computer readable medium for storing a computer program used by a computing device, the computer program executed by the computing device to generate a three dimensional (3-D) trajectory of an axisymmetric object from two dimensional (2-D) digital image data, the computer readable medium comprising:

  • computer code for receiving a sequence of 2-D digital images from a digital camera associated with the computing device;

    computer code for receiving orientation data which is used to determine or to specify an orientation of a lens of the digital camera in 3-D physical space, said lens configured to receive light used to generate the 2-D digital images;

    computer code for transforming pixel data in each of the 2-D digital images based upon the determined orientation of the lens;

    computer code for identifying a 2-D representation of an axisymmetric object captured in the transformed pixel data associated with each of the 2-D digital images;

    computer code for determining pixel coordinates of the 2-D representation of the axisymmetric object in each of the 2-D digital images;

    computer code for determining a characteristic length of the 2-D representation of the axisymmetric object measured in pixels in each of the 2-D digital images wherein the characteristic length of the 2-D representation varies within the sequence of the 2-D digital images;

    computer code for determining a distance to the identified 2-D representation of the axisymmetric object from the lens based upon the characteristic length in the pixels, said distance measured in units associated with 3-D physical space; and

    computer code for determining 3-D coordinates of the axisymmetric object as a function of time in the 3-D physical space based upon the determined distance and the pixel coordinates of the 2-D representation of the axisymmetric object captured in the transformed pixel data associated with each of the 2-D digital images.

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