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Precise calibration procedure for sensor-based view point control system

  • US 5,796,386 A
  • Filed: 06/19/1996
  • Issued: 08/18/1998
  • Est. Priority Date: 01/23/1995
  • Status: Expired due to Fees
First Claim
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1. In a system for processing and displaying graphics data representing at least one three-dimensional object according to a view point, wherein said view point is controlled according to position and orientation of a view point reference with respect to a source determined by a view point reference coordinate sensing system, said view point reference coordinate sensing system comprising said source and a sensor having a fixed position and orientation with respect to said view point reference, a method of determining said fixed position and orientation of said sensor with respect to said view point reference comprising the steps of:

  • storing a first position and orientation of said sensor with respect to a coordinate system of said source;

    rotating said sensor from said first position and orientation around a first rotational axis such that said sensor has a second position and orientation with respect to said coordinate system of said source, and storing said second position and orientation of said sensor with respect to said coordinate system of said source;

    storing a third position and orientation of said sensor with respect to said coordinate system of said source;

    rotating said sensor from said third position and orientation around a second rotational axis substantially orthogonal to said first axis such that said sensor has a fourth position and orientation with respect to said coordinate system of said source, and storing said fourth position and orientation of said sensor with respect to said coordinate system of said source; and

    determining said fixed position and orientation of said sensor with respect to said view point reference according to the stored first, second, third and fourth positions and orientations of said sensor with respect to said coordinate system of said source,wherein said first rotational axis passes through a pivot point having a known position relative to the position of said view point reference.

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