用高斯函数对图像进行平滑，很好的源代码高斯平滑也用于计算机视觉算法中的预处理阶段以增强图像在不同尺寸下的图像效果-Gaussian function used to smooth the image, a very good source Gaussian smoothing algorithm is also used in computer vision in the pre-processing stage to enhance the images in different sizes