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    UTILIZING DEPENDENCY BETWEEN WATERMARK VISIBILITY AND LOCATION OF IMAGE SAMPLE IN COLOR SPACE FOR EMBEDDED SIGNAL COLOR DIRECTION
    3.
    发明申请
    UTILIZING DEPENDENCY BETWEEN WATERMARK VISIBILITY AND LOCATION OF IMAGE SAMPLE IN COLOR SPACE FOR EMBEDDED SIGNAL COLOR DIRECTION 有权

    公开(公告)号：US20220012838A1

    公开(公告)日：2022-01-13

    申请号：US17358873

    申请日：2021-06-25

    Applicant: Digimarc Corporation

    Inventor： Alastair M. Reed ,  Kristyn R. Falkenstern

    IPC: G06T1/00

    Abstract: The present disclosure relates generally to signal encoding for printed objects. One implementation selects an embed direction based on a minimal visibility axis of a 1 JND ellipse at a certain color center. One claim recites an apparatus comprising: memory for storing chromatic contrast sensitivity data representing multiple color encoding angles; one or more multi-core processors configured for: using the stored chromatic contrast sensitivity data, generating an ellipse around a first color center; and from the ellipse, determining a signal encode direction, the signal encode direction comprising an angle α representing a negative angle between the ‘a*’ axis in an CIELAB space and a direction of minimum sensitivity of an encoded signal, in which the angle α comprises −9 degrees≥α≥−25 degrees. Other technology described.

    SIGNAL ENCODING FOR DIFFICULT ENVIRONMENTS
    4.
    发明申请
    SIGNAL ENCODING FOR DIFFICULT ENVIRONMENTS 有权

    公开(公告)号：US20210366073A1

    公开(公告)日：2021-11-25

    申请号：US17334206

    申请日：2021-05-28

    Applicant: Digimarc Corporation

    Inventor： Kristyn R. Falkenstern ,  Alastair M. Reed

    IPC: G06T1/00 ,  H04N1/32

    Abstract: This disclosure relates to advanced image signal processing technology including encoded signals and digital watermarking. We disclose methods, systems and apparatus for selecting which ink(s) should be selected to carry an encoded signal for a given machine-vision wavelength for a retail package or other printed design. We also disclose retail product packages and other printed objects, and methods to generate such, including a sparse mark in a first ink and an overprinted ink flood in a second ink. The first ink and the second ink are related through tack and spectral reflectance difference. Of course, other methods, packages, objects, systems and apparatus are described in this disclosure.

    Digital watermarking and data hiding with narrow-band absorption materials
    6.
    发明授权
    Digital watermarking and data hiding with narrow-band absorption materials 有权

    公开(公告)号：US11062418B2

    公开(公告)日：2021-07-13

    申请号：US16422597

    申请日：2019-05-24

    Applicant: Digimarc Corporation

    Inventor： Kristyn R. Falkenstern ,  Alastair M. Reed ,  Vojtech Holub ,  Tony F. Rodriguez

    IPC: G06T1/00 ,  G06K7/12 ,  G06K19/06 ,  G07D7/1205 ,  G07D7/00 ,  B42D25/333

    Abstract: The present disclosure relates to signal processing such as image processing, signal encoding, digital watermarking and data hiding. Technology includes a method comprising: capturing imagery corresponding to a printed object with a red illumination scanner, the red illumination scanner having a wavelength at or around 660 nm, said scanning yielding scan data, wherein the printed object includes a process color printed thereon through an offset or flexo printing press, the process color including a narrow-band absorption material that has a peak absorbance at or around 660 nm, the process color printed in a manner to convey an encoded plural-bit message, the encoded plural-bit message corresponding to a GTIN number; analyzing the imagery with one or more programmed multi-core processors to decode the encoded plural bit message, said analyzing yielding the GTIN number; and providing the GTIN number as an output. Of course other combinations and technology is also provided.

    Signal encoding for inks with low reflectivity
    8.
    发明授权
    Signal encoding for inks with low reflectivity 有权

    公开(公告)号：US10783602B1

    公开(公告)日：2020-09-22

    申请号：US15905631

    申请日：2018-02-26

    Applicant: Digimarc Corporation

    Inventor： Alastair M. Reed ,  Kristyn R. Falkenstern

    IPC: G06T1/00 ,  H04N1/32

    Abstract: This disclosure relates to advanced image signal processing technology including encoded signals and digital watermarking. One claim recites a printed object comprising a machine-readable signal therein, the printed object comprising: a substrate; a first color printed on a substrate, the first color printed on the substrate so as to include holes without the first color, the holes arranged corresponding to the 2-d spatial pattern representing the machine-readable signal; a second color printed in the holes, in which the first color and the second color comprise a spectral reflectance difference at or around 660nm in the range of 8%-60%, in which the second color is printed in the holes with a trap of 1-4 pixels, and in which the machine-readable signal is detectable from image data captured with red-light illumination, the red-light illumination comprising a peak illumination at or around 660nm, in which the trap comprises a spread trap, in which the second color overlaps the first color. The technology may be applied to retail packages and other printed objects, e.g., such as hang tags, labels and receipts.

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