Multi-camera image stitching calibration system

  • US 10,284,818 B2
  • Filed: 07/31/2017
  • Issued: 05/07/2019
  • Est. Priority Date: 10/05/2012
  • Status: Active Grant
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First Claim
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1. A method of calibrating cameras of a multi-camera vision system for a vehicle moving along a vehicle assembly line, said method comprising:

  • providing a plurality of targets at a vehicle assembly line at a vehicle assembly plant;

    equipping a vehicle that is being conveyed along the vehicle assembly line with a plurality of cameras that includes (i) a front camera disposed at a front portion of the vehicle and viewing at least forward of the vehicle, (ii) a driver-side camera disposed at a driver side of the vehicle and viewing at least sideward of the vehicle, (iii) a passenger-side camera disposed at a passenger side of the vehicle and viewing at least sideward of the vehicle, and (iv) a rear camera disposed at a rear of the vehicle and viewing at least rearward of the vehicle;

    moving the vehicle along the vehicle assembly line;

    wherein providing a plurality of targets at the vehicle assembly line comprises providing a plurality of calibrating targets;

    wherein, when the vehicle is moved along the vehicle assembly line so as to be at the provided calibrating targets, at least some targets of the calibrating targets are encompassed by respective fields of view of the front camera, the driver-side camera, the passenger-side camera and the rear camera;

    capturing image data with the cameras as the vehicle moves along the vehicle assembly line;

    determining, via processing of captured image data and as the vehicle moves along the vehicle assembly line, presence of at least one target of the plurality of targets in the field of view of at least one of the cameras; and

    responsive to determination of presence of at least one target in the field of view of at least one of the cameras, calibrating the cameras via processing captured image data and determining presence of the calibrating targets in the respective fields of view of the front camera, the driver-side camera, the passenger-side camera, and the rear camera as the vehicle moves along the vehicle assembly line.

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