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    Device and Methods for Authenticating a User Equipment
    2.
    发明申请
    Device and Methods for Authenticating a User Equipment 审中-公开

    公开(公告)号：US20190260739A1

    公开(公告)日：2019-08-22

    申请号：US16343301

    申请日：2017-10-04

    Applicant: POLITECNICO DI TORINO

    Inventor： Enrico Magli ,  Giulio Coluccia ,  Diego Valsesia ,  Tiziano Bianchi

    IPC: H04L29/06 ,  G06F21/44 ,  H04W12/06 ,  G06K9/46 ,  G06K9/00 ,  H04L9/06 ,  H03M13/13

    Abstract: A device, a user equipment, and methods for registering and authenticating the user equipment are provided, wherein the user equipment includes an image sensor, communication components for communicating with the device, control and processing components configured for acquiring at least one image by way of the image sensor, generating an authentication sensor fingerprint on the basis of the at least one acquired image, coding at least one portion of the authentication sensor fingerprint by way of a random projection algorithm, so as to generate at least one compressed portion (W′) of the authentication sensor fingerprint, transmitting, through the communication components, the at least one compressed portion (W′) to the device.

    Methods and apparatus for encoding and decoding digital images or video streams
    5.
    发明授权
    Methods and apparatus for encoding and decoding digital images or video streams 有权

    公开(公告)号：US10609373B2

    公开(公告)日：2020-03-31

    申请号：US15759631

    申请日：2016-09-16

    Applicant: SISVEL TECHNOLOGY S.R.L. ,  POLITECNICO DI TORINO

    Inventor： Giulia Fracastoro ,  Enrico Magli

    IPC: H04N19/126 ,  H04N19/14 ,  H04N19/176 ,  H04N19/182 ,  H04N19/60 ,  H04N19/12 ,  H04N19/463 ,  H04N19/90

    Abstract: Methods and apparatuses for encoding and/or decoding digital images or video streams, wherein the encoding apparatus includes a processor configured for reading a portion of the image (f), computing difference values between pixel values of the image, quantizing such pixel difference values for obtaining a quantized weight map (W), computing an edge map (f′) composed by elements (f′i) indicating whether a corresponding pixel of the portion of the image is an edge or not on the basis of the quantized weight map, determining a reconstructed weight map (W′) on the basis of the edge map (f′), determining a graph transform matrix (U) on the basis of the reconstructed weight map (W′), computing transform coefficients (f{circumflex over ( )}) on the basis of the graph transform matrix (U) and said portion of the image (f), transmitting the computed transform coefficients (f{circumflex over ( )}) and the edge map (f′).

    Method and device for searching images
    7.
    发明授权
    Method and device for searching images 有权

    公开(公告)号：US10515112B2

    公开(公告)日：2019-12-24

    申请号：US15575234

    申请日：2016-06-20

    Applicant: POLITECNICO DI TORINO

    Inventor： Diego Valsesia ,  Giulio Coluccia ,  Tiziano Bianchi ,  Enrico Magli

    IPC: G06K9/00 ,  G06K9/62 ,  G06F16/583 ,  G06F16/51

    Abstract: A method and a device for searching for images in memory containing at least one or more images and, for each image, at least one sensor fingerprint associated with the image and related to the sensor that acquired the image includes a reading phase, wherein a search sensor fingerprint is read, a compression phase, wherein the search sensor fingerprint and at least one of the sensor fingerprints associated with the images are compressed by using a random projection technique, and a searching phase, wherein the images contained in the memory are either selected or discarded by comparing the sensor fingerprints of the images with the search sensor fingerprint.

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