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    Digital image color correction device employing fuzzy logic
    11.
    发明授权
    Digital image color correction device employing fuzzy logic 失效
    Gerätzur Farbkorrektur von digitaler Bilder mit Fuzzy-Logik

    公开(公告)号：EP0927952B1

    公开(公告)日：2003-05-07

    申请号：EP97830730.4

    申请日：1997-12-30

    Applicant: STMicroelectronics S.r.l.

    Inventor： Colla, Federica ,  Mancuso, Massimo ,  Poluzzi, Rinaldo

    IPC: G06T1/00 ,  G06T7/40

    CPC classification number: H04N9/643 ,  G06T7/90 ,  H04N1/628

    Abstract: A digital image color correction device employing fuzzy logic, for correcting a facial tone image portion of a digital video image, characterized in that it comprises: a pixel fuzzifier unit (1) receiving in input a stream of pixels belonging to a sequence of correlated frames of a digital video image and computing a multi level value representing a membership of each pixel to a skin color class; a global parameter estimator (2) receiving in input each of said pixel and the relative membership value, and computing a first and a second parameter which define the characteristics of a portion of said image that belongs to said skin color class; a processing unit (3) connected downstream to said global parameter estimator and to said pixel fuzzifier unit and adapted to correct each of the pixels of said portion of the image that belongs to said skin color class, according to said first global parameter (300), to obtain corrected pixels; and a processing switch (4) for outputting said pixels or said corrected pixels according to said second global parameter (400).

    Abstract translation: 一种采用模糊逻辑的数字图像颜色校正装置，用于校正数字视频图像的面部色调图像部分，其特征在于，其包括：像素模糊器单元（1），其在输入端接收属于相关帧序列的像素流 并且将表示每个像素的隶属度的多级值计算为肤色等级; 全局参数估计器（2），其中输入每个所述像素和相对隶属值，并且计算定义属于所述肤色类的所述图像的一部分的特征的第一和第二参数; 连接到所述全局参数估计器的下游的处理单元（3）和所述像素模糊器单元，并且适于根据所述第一全局参数（300）来校正属于所述皮肤颜色等级的所述图像的所述部分的每个像素， ，以获得校正像素; 以及用于根据所述第二全局参数（400）输出所述像素或所述校正像素的处理开关（4）。

    Post-processing method for reducing artifacts in block-coded digital images, and post-processing device for actuating such method
    17.
    发明公开
    Post-processing method for reducing artifacts in block-coded digital images, and post-processing device for actuating such method 失效
    Nachverarbeitungsmethode用于降低块编码数字图像伪影，和设备用于使用所述方法

    公开(公告)号：EP0881837A1

    公开(公告)日：1998-12-02

    申请号：EP97830264.4

    申请日：1997-05-30

    Applicant: STMicroelectronics S.r.l.

    Inventor： Mancuso, Massimo ,  Poluzzi, Rinaldo

    IPC: H04N7/30

    CPC classification number: H04N19/527 ,  H04N19/86

    Abstract: A post-processing method for reducing artifacts in block-coded digital images, characterized by providing for: dividing an input image (In) into a plurality of image blocks (IB); for each image block (IB), estimating global features (GF) of said image block providing information on an average content of image edges along the horizontal and vertical directions of said image block (IB); for each pixel (Px) of an image block (IB) under examination, estimating local features (LF) for said pixel (Px) providing information on the content of image edges along the horizontal and vertical directions of an image area near said pixel (Px); modifying the value of said pixel (Px) according to both said global features (GF) of the image block (IB) to which said pixel (Px) belongs and said local features (LF) of the image area near said pixel (Px).

    Abstract translation: 用于降低块编码的数字图像，通过提供一种用于表征的伪影的后处理方法，包括：输入图像（在）的分割成图像块（IB）的多元性; 对于每个图像块（IB），估计所述图像块上，以沿所述图像块的水平和垂直方向的图像边缘的平均含量（IB）提供信息的全局特征（GF）; 对于被检查的图像块（IB）的每个像素（PX）中，估计针对所述像素（PX）上的图像边缘的沿图像区域的邻近所述像素的水平和垂直方向上的内容提供信息的局部特征（LF）（ 像素）; 所述像素（PX）雅鼎的值来修改所述图像块（IB）的两个所述全局特征（GF）到其中，所述像素（PX）属于和靠近所述像素的图像区域的所述本地特征（LF）（Px）的 ，

    Adaptive intrafield reducing of gaussian noise by fuzzy logic processing
    18.
    发明公开
    Adaptive intrafield reducing of gaussian noise by fuzzy logic processing 失效
    自适应内部高斯 - 高斯 - 高分辨率

    公开(公告)号：EP0878776A1

    公开(公告)日：1998-11-18

    申请号：EP97830217.2

    申请日：1997-05-12

    Applicant: STMicroelectronics S.r.l.

    Inventor： Mancuso, Massimo ,  D'Alto, Viviana ,  Sirtori, Daniele ,  Poluzzi, Rinaldo

    IPC: G06T1/00 ,  G06T5/20

    CPC classification number: G06T5/20

    Abstract: The level of Gaussian noise in a memory field being scanned by rows is reduced by reconstructing each pixel by fuzzy logic processors, the latter processing the the values of pixels neighbouring the pixel being processed and belonging to a processing window defined by the last scanned row and the row being scanned, thus minimizing the memory requisite of the filtering system to a single row. The system perform an adaptive filtering within the current field itself and does not produce edge-smoothing effects as in prior adaptive filtering systems operating on consecutive fields.

    Abstract translation: 通过用模糊逻辑处理器重建每个像素来减少由行扫描的存储器场中的高斯噪声的水平，后者处理与正在处理的像素相邻的像素的值，并且属于由最后扫描行定义的处理窗口， 该行被扫描，从而将过滤系统的存储器必需度最小化到单个行。 该系统在当前字段本身内执行自适应滤波，并且不产生像在连续字段上操作的先前的自适应滤波系统中的@边缘平滑效应。

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