中文说明：
双边滤波代码，双边滤波是一种非线性的方法,同时考虑到了图像的空域信息和灰度相似性,以达到保边去噪的目的.双边滤波通过空域矩阵和值域矩阵形成一个新的权重矩阵,其中空域矩阵用来模糊去噪；值域矩阵用来保护边缘.
English Description：
Bilateral-Filtering code.Bilateral filtering is a nonlinear method, which takes into account the spatial information and gray similarity of the image to achieve the purpose of edge preserving denoising.The range matrix is used to protect edges.