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METHODS AND APPARATUS FOR MEASURING 3D DIMENSIONS ON 2D IMAGES

  • US 20100124369A1
  • Filed: 11/20/2008
  • Published: 05/20/2010
  • Est. Priority Date: 11/20/2008
  • Status: Active Grant
First Claim
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1. A method for determining 3D distances on a 2D pixelized image of a part or object using a camera, a 3D CAD model of the object, and a workstation that includes a display, said method comprising:

  • acquiring a real 2D pixelized image of the object, using the camera;

    operating the workstation to create a simulated image of the object using the 3D CAD model and the 2D pixelized image;

    use the workstation to determine a specified cost function comparing the simulated image with the real 2D pixilated image;

    repositioning the simulated image in accordance with interated adjustments of a relative position between the CAD model and the 2D pixilated image to change the simulated image until the specified cost function is below a specified value;

    once below the specified value, using the workstation to generate a 3D distance scale matrix using the repositioned simulated image; and

    using the workstation to measure and display distances between selected pixels on a surface of the real image using 2D distances on the 2D pixelized image of the object and the 3D distance scale matrix.

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