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    IMAGE-BASED POSE DETERMINATION
    31.
    发明申请
    IMAGE-BASED POSE DETERMINATION 有权

    公开(公告)号：US20220114693A1

    公开(公告)日：2022-04-14

    申请号：US17468185

    申请日：2021-09-07

    Applicant: Digimarc Corporation

    Inventor： Geoffrey B. Rhoads ,  Tony F. Rodriguez ,  Ravi K. Sharma ,  Tomas Filler ,  Vahid Sedighianaraki

    IPC: G06T1/00 ,  G06T7/73 ,  G06T7/32 ,  G06T3/00

    Abstract: A steganographic digital watermark signal is decoded from host imagery without requiring a domain transformation for signal synchronization, thereby speeding and simplifying the decoding operation. In time-limited applications, such as in supermarket point-of-sale scanners that attempt watermark decode operations on dozens of video frames every second, the speed improvement allows a greater percentage of each image frame to be analyzed for watermark data. In battery-powered mobile devices, avoidance of repeated domain transformations extends battery life. A great variety of other features and arrangements, including machine learning aspects, are also detailed.

    SIGNALING ARRANGEMENTS EMPLOYING MOLDED THERMOPLASTICS
    33.
    发明申请
    SIGNALING ARRANGEMENTS EMPLOYING MOLDED THERMOPLASTICS 有权

    公开(公告)号：US20210387399A1

    公开(公告)日：2021-12-16

    申请号：US17347358

    申请日：2021-06-14

    Applicant: Digimarc Corporation

    Inventor： Tomas Filler ,  Vojtech Holub ,  Hugh L. Brunk ,  Ravi K. Sharma

    IPC: B29C59/02 ,  G06K19/06 ,  B29C59/00

    Abstract: A thermoplastic resin, such as PET, is molded to define a 2D code signal, such as a digital watermark pattern. The mold can comprise an array of hole or spike features, some of which are directly vented to atmospheric pressure. A network of channels can link the other features to the directly-vented features, so all features are vented. A mold comprising spike features can form a digital watermark pattern on an item such that the watermark payload is decodable both from the side of the item that contacted the mold, and also from the opposite, non-contact side of the item. To aid entry of viscous thermoplastic among the very fine elemental features of a mold representing a watermark signal pattern, the features can be overlapped, forming a connected binary mark having larger features. A variety of other improvements and arrangements are also detailed.

    ENHANCED NEURAL NETWORK SYSTEMS AND METHODS
    34.
    发明申请
    ENHANCED NEURAL NETWORK SYSTEMS AND METHODS 有权

    公开(公告)号：US20210357690A1

    公开(公告)日：2021-11-18

    申请号：US17323652

    申请日：2021-05-18

    Applicant: Digimarc Corporation

    Inventor： Geoffrey B. Rhoads ,  Ravi K. Sharma

    IPC: G06K9/62 ,  G06Q30/06

    Abstract: Two stages of a convolutional neural network are linked by an interconnect that effects a spatial transposition of array data. The spatial transposition can include rotation, scaling, or translation (e.g., in x- or y-directions). A parameter characterizing the transposition (e.g., a parameter identifying rotation angle) can be learned by the same training process that is also used to learn other network parameters, such as layer coefficients. Additionally, or alternatively, data input to a neural network comprises—for each pixel in a patch of imagery—plural data that each indicates a relationship between the value of the pixel, and the value of a neighboring pixel. Some such neural networks can be trained to indicate the presence of a digital watermark signal in the patch of imagery—or a parameter characterizing such a digital watermark signal. Other features and arrangements are also detailed.

    Human auditory system modeling with masking energy adaptation
    35.
    发明授权
    Human auditory system modeling with masking energy adaptation 有权

    公开(公告)号：US11145317B1

    公开(公告)日：2021-10-12

    申请号：US16056160

    申请日：2018-08-06

    Applicant: Digimarc Corporation

    Inventor： Aparna R. Gurijala ,  Shankar Thagadur Shivappa ,  Ravi K. Sharma ,  Brett A. Bradley

    IPC: G10L19/018 ,  G10L25/48 ,  G10L21/007 ,  G10L21/0208 ,  G10L19/26

    Abstract: A method for generating a psychoacoustic model from an audio signal transforms a block of samples of an audio signal into a frequency spectrum comprising frequency components. From this frequency spectrum, it derives group masking energies. These group masking energies each correspond to a group of neighboring frequency components in the frequency spectrum. For a group of frequency components, the method allocates the group masking energy to the frequency components in the group in proportion to energy of the frequency components within the group to provide adapted mask energies for the frequency components within the group, the adapted mask energies providing masking thresholds for the psychoacoustic model of the audio signal.

    Hardware-adaptable watermark systems
    36.
    发明授权
    Hardware-adaptable watermark systems 有权

    公开(公告)号：US10593008B2

    公开(公告)日：2020-03-17

    申请号：US16207509

    申请日：2018-12-03

    Applicant: Digimarc Corporation

    Inventor： Jacob L. Boles ,  Ravi K. Sharma ,  John D. Lord

    IPC: G06K9/00 ,  H04N7/167 ,  G06T1/00 ,  H04N19/42 ,  H04N19/467

    Abstract: There are many advantages to implementing a watermark-based system using dedicated hardware, rather than using software executing on a general purpose processor. These include higher speed and lower power consumption. However, hardware implementations incur substantial design and development costs. Moreover, because each watermarking application has its own design constraints and parameters, it has not been cost-effective to develop a hardware chip design for each, since such chips would typically not be manufactured in volumes sufficient to bring per-unit costs down to an acceptable level. The present technology provides various techniques for making watermarking hardware adaptable, so that a single chip can serve multiple diverse watermark applications. By so-doing, the advantages of hardware implementation are made available where it was formerly cost-prohibitive, thereby enhancing operation of a great variety of watermark-based systems.

    Signal decoding methods, apparatus and systems
    39.
    发明授权
    Signal decoding methods, apparatus and systems 有权

    公开(公告)号：US09928560B2

    公开(公告)日：2018-03-27

    申请号：US15605904

    申请日：2017-05-25

    Applicant: Digimarc Corporation

    Inventor： Alastair M. Reed ,  Ravi K. Sharma

    IPC: G06K9/00 ,  G06T1/00 ,  H04N1/32

    CPC classification number: G06T1/0028 ,  G06K9/00 ,  G06T1/0021 ,  G06T1/005 ,  G06T2201/0051 ,  G06T2201/0052 ,  G06T2201/0601 ,  H04N1/32309

    Abstract: The present invention relate generally to signal encoding and decoding. One claim recites a method comprising: obtaining color image data or color video data, the color image data or color video data comprising an encoded signal pattern, the encoded signal pattern aiding detection of an encoded message, the pattern comprising first frequency components and second frequency components, the color image data or color video data comprising first color data and second color data, in which the first color data comprises the first frequency components encoded therein, and the second color data comprises the second frequency components encoded therein; combining the first color data and the second color data, said combining yielding combined color data; utilizing one or more processors or electronic processing circuitry, detecting the encoded signal pattern from the combined color data, said detecting yielding rotation and scale information; and using the rotation and scale information to detect the encoded message from the combined color data. Of course, other combinations and claims are provided too.

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