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Surveying method

  • US 9,109,890 B2
  • Filed: 05/10/2011
  • Issued: 08/18/2015
  • Est. Priority Date: 05/10/2010
  • Status: Active Grant
First Claim
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1. A surveying method for measuring an object, wherein the object belongs to a group of known types of objects, and determining an object representing point corresponding to the type of the object, by a surveying instrument configured to measure distances and angles, and comprising a processor and a camera, the method comprising:

  • determining with the processor a series of points at the object by measuring distances and angles to the points in a defined angle area;

    analyzing with the processor the spatial distribution of the points and, based thereon, identifying the type of the object and assigning relevant points lying on the object to a first group of points;

    capturing an image of the object with the camera;

    extracting a contour of the object from the image with the processor by use of an image processing method;

    fitting with the processor at least one space curve to the object on the basis of the first group of points and the extracted contour; and

    determining with the processor the coordinates of the object representing point from the fitted space curve,wherein the series of points is split into at least a first group of relevant points presumably laying on the object and a second group of points by distances analysis and/or software algorithms executed by the processor, and at least one fitted line is calculated, which corresponds to the first group of points.

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