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Target marking for secure logo validation process

  • US 9,626,559 B2
  • Filed: 07/02/2014
  • Issued: 04/18/2017
  • Est. Priority Date: 07/02/2013
  • Status: Active Grant
First Claim
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1. A method comprising:

  • acquiring via a vehicle wheel alignment system an image of a wheel alignment target,wherein the wheel alignment target is mounted in association with a wheel of a vehicle, and includes a validation logo and a plurality of target reference points having known relative positions, the validation logo being used for recognition by the vehicle wheel alignment system and determination of authenticity of the validation logo by the vehicle wheel alignment system, and the plurality of target reference points being used to perform wheel alignment on the basis of observation of the plurality of target reference points having the known relative positions;

    determining, on the basis of the positions of the target reference points in the acquired image of the wheel alignment target, a projective transformation relating the image of the wheel alignment target to a known orientation;

    performing the determined projective transformation to facilitate comparison of the image of the wheel alignment target and the reference validation logo;

    identifying the validation logo within the image of the wheel alignment target based on the performed projective transformation;

    comparing the identified validation logo with a reference validation logo;

    computing a similarity metric based on a result of a comparison between the identified validation logo and the reference validation logo;

    based on the computed similarity metric, enabling or disabling the vehicle wheel alignment system; and

    upon enabling the wheel alignment system, computing at least one measurement of the vehicle based on an image of the wheel alignment target including the validation logo acquired via a same image sensor of the vehicle wheel alignment system used to acquire the image used to identify the validation logo.

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