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    Systems and Methods for Processing a Digital Image
    2.
    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
    3.
    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.

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