Patent ID: 11898875
Assignee: TOPCON POSITIONING SYSTEMS, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method comprising:
acquiring an image of a target object from a camera, the target object having a defined physical size and a plurality of contrasting markings disposed on an outer surface thereof;
locating, from the image, a plurality of boundaries associated with the plurality of contrasting markings with respect to a horizontal centerline of the target object;
estimating, from the image, a size of the target object in the image based on the plurality of boundaries;
locating edges of the plurality of boundaries between substantially all of the plurality of contrasting markings disposed on the outer surface of the target object; and
determining a distance between the target object and the camera based on the edges between substantially all of the plurality of contrasting markings and the estimated size of the target object in the image, the defined physical size of the target object, and at least one optical property associated with the camera.