中文说明：L0 平滑滤波器是一种滤波器的衰减噪声，同时保留在图像中锋利的转折。在可以帮助作为一个预处理步骤中许多图像和信号处理任务。
English Description：
L0 smoothing filter is a kind of filters which attenuate the noise while preserving the sharp transitions in an image. In can be helpful as an pre-processing step in many image and signal processing tasks.