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Position-information specifying method, position-information specifying device, and position-information specifying program

  • US 10,706,580 B2
  • Filed: 12/06/2016
  • Issued: 07/07/2020
  • Est. Priority Date: 12/09/2015
  • Status: Active Grant
First Claim
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1. A position-information specifying method comprising:

  • a step for obtaining an object image photographed by a first photographing means mounted in a movable body having a predetermined distortion characteristic, a predetermined distortion being caused on the object image due to the predetermined distortion characteristic;

    a step for obtaining a first scale plate image corresponding to an image obtained when a first scale plate, which has a first scale and is arranged so as to be opposed to a second photographing means having the predetermined distortion characteristic at a first distance, is photographed by the second photographing means;

    a step for overlapping the first scale plate image and the object image with each other;

    a step for measuring an image-size of a first reference object, which is appeared on the object image and has a first predetermined size, by using the first scale of the first scale plate image; and

    a step for calculating a first target distance between the first photographing means and the first reference object, based on the image-size of the first reference object, the first predetermined size, and the first distance.

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