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    Systems and Methods for Processing a Digital Image
    4.
    发明申请
    Systems and Methods for Processing a Digital Image 审中-公开

    公开(公告)号：US20170280144A1

    公开(公告)日：2017-09-28

    申请号：US15594544

    申请日：2017-05-12

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Itsik Dvir ,  Natan Peterfreund ,  Dror Irony ,  David Drezner

    IPC: H04N19/174 ,  G06T3/60 ,  H04N19/119

    Abstract: An apparatus adapted, including a media encoder coupled to a data interface adapted to receive a frame or portion thereof. The media encoder is adapted to iteratively subdivide each block of a plurality of blocks partitioned in a frame or portion thereof and to process a subdivided block of the plurality of blocks, during each iteration of a plurality of iterations, by selecting a rotational symmetry mask fulfilling an efficiency measure for coding said block, the rotational symmetry mask selected from a plurality of rotational symmetry masks which define a plurality of different rotational symmetries in a multidimensional space, splitting the subdivided block to two complementary portions based on the rotational symmetry mask, generating a pair of rotational symmetry blocks each having one of said two complementary portions, and computing a plurality of transform coefficients from the pair of rotational symmetry blocks.

    Image and video processing apparatuses and methods
    6.
    发明授权
    Image and video processing apparatuses and methods 有权

    公开(公告)号：US11265575B2

    公开(公告)日：2022-03-01

    申请号：US16880653

    申请日：2020-05-21

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Itsik Dvir ,  Natan Peterfreund ,  Dror Irony ,  David Drezner ,  Ady Ecker ,  Amiram Allouche

    IPC: H04N19/547 ,  H04N19/55 ,  H04N19/567

    Abstract: The invention relates to an image processing apparatus for compressing or decompressing a segment of an image. The segment includes a plurality of pixels, each pixel includes a pixel value and a pixel position defined by a first coordinate system. The pixel values of the plurality of pixels form a pixel value vector. The apparatus includes processing circuitry configured to compress and/or decompress the segment. Compressing the segment includes computing a plurality of expansion coefficients by expanding the pixel value vector into a plurality of basis vectors that are discrete approximations of solutions of a boundary value problem of the Helmholtz equation on the segment of the image in a second coordinate system rotated relative to the first coordinate system. Decompressing the segment includes computing the pixel value vector by forming a linear combination of the basis vectors using the plurality of expansion coefficients.

    Image and video processing apparatuses and methods
    7.
    发明授权
    Image and video processing apparatuses and methods 有权

    公开(公告)号：US10951920B2

    公开(公告)日：2021-03-16

    申请号：US16429891

    申请日：2019-06-03

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Itsik Dvir ,  Natan Peterfreund

    IPC: H04N19/60 ,  H04N19/182 ,  H04N19/44 ,  H04N19/20 ,  G06F17/14 ,  G06F17/13 ,  H04N19/90

    Abstract: The disclosure relates to an image processing apparatus for compressing or decompressing a segment of an image, the segment being non-rectangular and comprising a plurality of pixels, each pixel comprising a pixel value, the pixel values of the plurality of pixels forming a pixel value vector, the apparatus comprising: a processor configured to compress the segment or configured to decompress the segment, wherein compressing the segment comprises computing a plurality of expansion coefficients by expanding the pixel value vector into a plurality of basis vectors, wherein the basis vectors are discrete approximations of solutions of a boundary value problem of the Helmholtz equation on the segment of the image; and wherein decompressing the segment comprises computing the pixel value vector by forming a linear combination of the basis vectors according to the plurality of expansion coefficients.

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