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）。

公开(公告)号：EP0927952A1

公开(公告)日：1999-07-07

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）。