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    METHODS AND APPARATUSES FOR ENCODING AND DECODING DIGITAL IMAGES OR VIDEO STREAMS
    1.
    发明申请
    METHODS AND APPARATUSES FOR ENCODING AND DECODING DIGITAL IMAGES OR VIDEO STREAMS 审中-公开
    编码和解码数字图像或视频流的方法和装置

    公开(公告)号：WO2017046750A1

    公开(公告)日：2017-03-23

    申请号：PCT/IB2016/055526

    申请日：2016-09-16

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

    Inventor： FRACASTORO, Giulia ,  MAGLI, Enrico

    IPC: H04N19/12 ,  H04N19/14 ,  H04N19/176 ,  G06T9/20

    CPC classification number: H04N19/12 ,  B29C2947/92209 ,  B29C2947/924 ,  H04N19/14 ,  H04N19/176 ,  H04N19/463 ,  H04N19/90

    Abstract: The present invention relates to methods and apparatuses for encoding and/or decoding digital images or video streams, wherein the encoding apparatus (1100) comprises processing means (1110) configured for reading a portion of said 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 said 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^) on the basis of the graph transform matrix (U) and said portion of the image (f), transmitting the computed transform coefficients (f^) and the edge map (f').

    Abstract translation: 本发明涉及用于编码和/或解码数字图像或视频流的方法和装置，其中编码装置（1100）包括被配置用于读取所述图像（f）的一部分的处理装置（1110），计算像素 对所述图像的值进行量化，以获得量化权重映射（W）量化所述像素差值，计算由表示所述图像的所述部分的相应像素是否为边缘的元素（f'）组成的边缘图（f'） 或者不基于量化权重图，基于边缘图（f'）确定重构权重映射（W'），基于重构的权重映射（W）来确定图形变换矩阵（U） '），基于图形变换矩阵（U）和图像（f）的所述部分计算变换系数（f ^），发送计算出的变换系数（f ^）和边缘图（f'）。

    APPARATUSES AND METHODS FOR ENCODING AND DECODING IMAGES
    2.
    发明申请
    APPARATUSES AND METHODS FOR ENCODING AND DECODING IMAGES 审中-公开
    用于编码和解码图像的装置和方法

    公开(公告)号：WO2017064645A1

    公开(公告)日：2017-04-20

    申请号：PCT/IB2016/056138

    申请日：2016-10-13

    Applicant: SISVEL TECHNOLOGY SRL ,  POLITECNICO DI TORINO

    Inventor： FRACASTORO, Giulia ,  MAGLI, Enrico

    IPC: H04N19/625

    CPC classification number: H04N19/625 ,  H04N19/122 ,  H04N19/147 ,  H04N19/176

    Abstract: The present invention relates to a method and an apparatus for encoding and/or decoding digital images or video streams, wherein the encoding apparatus (11) comprises processing means (1100) configured for reading at least a portion of an image (f), determining a rotation angle (θ) on the basis of said portion of said image (f), determining rotated transform matrix (V ') which is the result of a rotation of at least one basis vector of a Discrete Cosine Transform matrix (V) by said rotation angle (θ), computing transformed coefficients (f^) on the basis of the pixel values contained in said portion of the image (f) and said rotated transform information (V'), outputting the transformed coefficients (f^) to said destination (1110).

    Abstract translation: 用于编码和/或解码数字图像或视频流的方法和设备技术领域本发明涉及用于编码和/或解码数字图像或视频流的方法和设备，其中编码设备（11）包括处理装置（1100），其被配置用于读取至少一部分 （f）的至少一个基矢量的旋转的结果来确定旋转角度（θ），确定旋转变换矩阵（V'），该旋转变换矩阵（V'）是图像 离散余弦变换矩阵（V）除以所述旋转角度（θ），基于包含在图像（f）的所述部分中的像素值和所述旋转变换信息（V'）计算变换系数（f ^），输出 经变换的系数（f ^）到所述目的地（1110）。

    METHODS AND APPARATUSES FOR ENCODING AND DECODING DIGITAL IMAGES THROUGH SUPERPIXELS
    3.
    发明申请
    METHODS AND APPARATUSES FOR ENCODING AND DECODING DIGITAL IMAGES THROUGH SUPERPIXELS 审中-公开
    通过超级密码编码和解码数字图像的方法和设备

    公开(公告)号：WO2017051358A1

    公开(公告)日：2017-03-30

    申请号：PCT/IB2016/055684

    申请日：2016-09-23

    Applicant: SISVEL TECHNOLOGY SRL ,  POLITECNICO DI TORINO

    Inventor： FRACASTORO, Giulia ,  MAGLI, Enrico ,  VERDOJA, Francesco ,  GRANGETTO, Marco

    IPC: H04N19/60 ,  H04N19/17 ,  G06T9/00 ,  G06K9/62 ,  G06T7/00

    CPC classification number: H04N19/60 ,  G06K9/34 ,  G06K9/6224 ,  H04N19/17

    Abstract: The present invention relates to a method and an apparatus for encoding and/or decoding digital images or video streams, wherein the encoding apparatus (1100) comprises processing means (1110) configured for reading at least a portion of said image, segmenting the portion of said image in order to obtain groups of pixels identified by borders information and containing at least two pixels having one or more homogeneous characteristics, computing, for each group of pixels, a weight map on the basis of the borders information associated to said group of pixels (P i ), a graph transform matrix on the basis of said weight map, and transform coefficients on the basis of said graph transform matrix (U) and of the pixels contained in said group of pixels.

    Abstract translation: 本发明涉及一种编码和/或解码数字图像或视频流的方法和装置，其中编码装置（1100）包括处理装置（1110），其被配置用于读取所述图像的至少一部分， 所述图像为了获得由边界信息识别并包含具有一个或多个均匀特性的至少两个像素的像素组，基于与所述像素组相关联的边界信息，针对每组像素计算权重映射 （Pi），基于所述权重图的图形变换矩阵，以及基于所述图形变换矩阵（U）和所述像素组中包含的像素的变换系数。

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