Hand-held device and method for authenticating a marking
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United States of America Patent
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Feb 13, 2018
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app pub date -
Oct 10, 2014
filing date -
Oct 11, 2013
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Abstract
A hand-held device for authenticating a marking on an object, said marking exhibiting a viewing-angle dependent light reflection spectrum. The device includes an imager for receiving light from said object and generating image data that include spectrum information, a marking detector for detecting marking image data associated with said marking in said image data, a parameter evaluator for determining a value of a predetermined spectrum parameter based on spectrum information of at least a part of said marking image data, an angle estimator for determining a value of a viewing angle between said imager and said marking associated with a determined value of said spectrum parameter, and an authenticator arranged for making an authentication decision based on at least two spectrum parameter values and their associated viewing angle values.
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