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    • 4. 发明授权
    • Method and apparatus for encoding an image signal by using the contour
signal thereof
    • 通过使用其轮廓信号对图像信号进行编码的方法和装置
    • US5881175A
    • 1999-03-09
    • US869557
    • 1997-06-05
    • Jong-II Kim
    • Jong-II Kim
    • G06T9/00G06T9/20H03M7/30H04N19/20H04N19/21H04N19/25H04N19/60H04N19/625H04N19/91G06K9/36
    • G06T9/20H04N19/563H04N19/649H04N19/20
    • In an encoding method for use in an encoder to encode an image signal including an object having object pixels, a background having background pixels and a contour signal representing the contour of the object, the contour signal is first encoded based on mask data having first and second binary values to designate an object pixel and a background pixels, respectively and then decoded to generate a decoded contour. In the mean time, a primary padded image signal obtained by applying a primary padding on the image signal is divided into multiplicity of equal-sized primary padded blocks and then each of the primary padded blocks is defined either as a contour block or as an object block based on the decoded contour to thereby select contour blocks and object blocks. Thereafter, each of the contour blocks are masked based on the decoded contour to form each of corresponding masked blocks by replacing every pixel value inside the decoded contour with a first binary value, respectively and every pixel value outside the decoded contour with a second binary value, respectively to thereby supply a multiplicity of corresponding masked blocks. And then, each of the contour blocks are padded based on the mask data and said each of corresponding masked blocks, thereby providing padded contour blocks and in turn the padded contour blocks and the object blocks are encoded to thereby provide an encoded texture signal of the image signal.
    • 在编码方法中,对包含具有物体像素的物体的图像信号进行编码,具有背景像素的背景和表示物体的轮廓的轮廓信号,轮廓信号首先根据具有第一和第 第二二进制值分别指定对象像素和背景像素,然后被解码以生成解码轮廓。 同时,将通过在图像信号上施加一次填充而获得的主要填充图像信号划分成多个等大小的主填充块,然后将每个主填充块定义为轮廓块或作为对象 基于解码的轮廓,从而选择轮廓块和对象块。 此后,基于解码的轮廓对每个轮廓块进行掩蔽,以分别用第一二进制值替换解码轮廓内的每个像素值,并将解码轮廓外的每个像素值用第二二进制值形成每个对应的掩码块 ,从而提供多个相应的屏蔽块。 然后,基于掩模数据和所述每个相应的屏蔽块填充每个轮廓块,从而提供填充的轮廓块,并且依次对填充的轮廓块和对象块进行编码,从而提供编码的纹理信号 图像信号。