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    • 10. 发明申请
    • System and method for removing ringing artifacts
    • 用于消除振铃伪影的系统和方法
    • US20050147319A1
    • 2005-07-07
    • US10863160
    • 2004-06-07
    • Sachin DeshpandeHao Pan
    • Sachin DeshpandeHao Pan
    • G06K9/40H04N7/26H04N7/30
    • H04N19/86H04N19/117H04N19/136H04N19/60
    • Ringing artifacts are removed from a quantized image by an image de-ringing filter that includes a determination unit, an adaptive filter and a nonlinear low-pass filter. The determination unit determines whether each selected pixel of a first set of selected pixels of an image contains a ringing artifact based on, for example, gray-level values of selected pixels within a determination kernel of pixels relating to the selected pixel. The adaptive filter generates a filtered gray-level value for each pixel determined by the determination unit to contain a ringing artifact based on, for example, gray-level values of selected pixels within a filtering kernel of pixels relating to the pixel. The nonlinear low-pass filter generates a low-pass-filtered gray-level value for each selected pixel of a second set of selected pixels of the image.
    • 通过包括确定单元,自适应滤波器和非线性低通滤波器的图像去环形滤波器从量化图像中去除振铃伪影。 确定单元基于例如与所选择的像素相关的像素的确定内核中的所选像素的灰度值来确定图像的所选择的像素的第一组的每个所选像素是否包含振铃伪迹。 自适应滤波器针对由确定单元确定的每个像素生成滤波灰度值,以包含基于例如与像素相关的像素的滤波核心内的所选像素的灰度值的振铃伪影。 非线性低通滤波器为图像的第二组选定像素的每个选定像素产生低通滤波灰度值。