（1）读取一幅图像，添加高斯、椒盐噪声，用邻域平均法、中值滤波法和K邻近平均法处理。

（2）读取一幅图像，利用Roberts梯度法、Sobel算子和拉普拉斯算子进行锐化，并比较结果。-1.read an image, add a Gaussian/salt or pepper noise, then process with the neighborhood average/median filtering or K N nearest average law method.Output processed images.

2.Read an image, sharpen it with the Roberts gradient method , Sobel operator and Laplacian operator, output the results.