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 the filter window size and the filter number. After processing the images can be saved.