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    • 10. 发明申请
    • Guided Image Up-Sampling in Video Coding
    • 视频编码中的引导图像上采样
    • US20130039430A1
    • 2013-02-14
    • US13569125
    • 2012-08-07
    • Guan-Ming SuSheng QuYin PengYan Ye
    • Guan-Ming SuSheng QuYin PengYan Ye
    • H04N7/12
    • H04N19/44H04N19/117H04N19/137H04N19/186H04N19/187H04N19/33H04N19/46H04N19/59H04N19/80H04N19/86H04N19/89
    • An encoder receives a first image of a first spatial resolution and a second image of a second spatial resolution, wherein both the first image and the second image represent the same scene and the second spatial resolution is higher than the first spatial resolution. A filter is selected to up-sample the first image to a third image with a spatial resolution same as the second spatial resolution. The filtering coefficients for the up-sampling filter are computed by minimizing an error measurement (e.g., MSE) between pixel values of the second image and the third image. The computed set of filtering coefficients is signaled to a receiver (e.g., as metadata). A decoder receives the first image (or its approximation) and the metadata, and may up-sample the first image using the same filter and optimally selected filtering coefficients as those derived by the encoder.
    • 编码器接收第一空间分辨率的第一图像和第二空间分辨率的第二图像,其中第一图像和第二图像都表示相同的场景,并且第二空间分辨率高于第一空间分辨率。 选择滤波器以将第一图像向第三图像进行上采样,其具有与第二空间分辨率相同的空间分辨率。 通过最小化第二图像和第三图像的像素值之间的误差测量(例如,MSE)来计算上采样滤波器的滤波系数。 所计算的滤波系数组被发送给接收机(例如,作为元数据)。 解码器接收第一图像(或其近似值)和元数据,并且可以使用与编码器导出的滤波系数相同的滤波器和最佳选择的滤波系数来对第一图像进行采样。