Method for authenticating a magnetically induced mark with a portable device

    公开(公告)号:US11823003B2

    公开(公告)日:2023-11-21

    申请号:US17434704

    申请日:2020-02-10

    Abstract: The invention relates to a method of authenticating a magnetically induced mark applied on a substrate including magnetically oriented partially reflective platelet-shaped magnetic or magnetizable pigment particles, with a portable device equipped with a light source operable to deliver visible light, an imager, a processor and a memory, the method comprising calculating, with the processor, a corresponding average intensity I of the light reflected by the partially reflective platelet-shaped magnetic or magnetizable pigment particles and collected by the imager at corresponding viewing angle θ, storing the calculated average intensities of the reflected light and corresponding viewing angles to obtain a reflected light intensity curve I(θ), comparing the stored reflected light intensity curve I(θ) with a stored reference reflected light intensity curve Iref(θ) for said magnetically induced mark, and determining whether the magnetically induced mark is genuine based on a result of the comparison.

    Mark authentication from light spectra

    公开(公告)号:US11138400B2

    公开(公告)日:2021-10-05

    申请号:US15024602

    申请日:2014-09-23

    Abstract: Authenticating a mark having a marker that emits light under illumination, involving an obtaining of a light spectrum from the mark, the light spectrum having values, each value indicating a light intensity of the light emitted from the mark for a corresponding wavelength, an applying of a set of rules onto the values of the light spectrum to obtain a first result indicating whether the mark is authentic or not, an applying of statistical processing onto the values of the light spectrum to obtain a second result indicating whether the mark is authentic or not, and a generating of an output result indicating whether the mark is authentic or not from the first result and the second result.

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