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US 11,898,875 B2Granted
Method and apparatus for single camera optical measurements
AssigneeTopcon Positioning Systems, Inc.
InventorLeonid Valerianovich Edelman
Life of this patent
Estimating the term…
Abstract
An optical measurement system and method that utilizes a single camera in combination with a specially configured target object which significantly improves optical measuring accuracy with respect to the measurement of distance, height difference and position.
Claims18
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.
3 more elements
An apparatus comprising:
- a processor;
- and
- a non-transitory memory to store computer program instructions, the computer program instructions when executed by the processor cause the processor to perform operations 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.
6 more elements
A non-transitory computer readable medium storing computer program instructions which, when executed on a processor, cause the processor to perform operations 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.
3 more elements
Dependencies are inferred from the claim text.