程序的功能是对载入的图像进行线性滤波，滤波算子有梯度算子、平滑算子、高斯算子和拉普拉斯算子，同时可以设置滤波窗口的大小和滤波数。处理完后的图像可以进行保存。-Function of the program image is loaded linear filter, the filter operator with the gradient operator, smooth operator, Gaussian operator and Laplace operator, and can set

3 fisrt parts are: Download the file Square.tif and answer the following questions: i. Smooth the image with a 3 􀵈 3 spatial filter. ii. Smooth the image with an implementation of Gaussian filter in frequency domain. Change the bandwi