说明：  高斯平滑滤波器被使用去模糊图像，和均值滤波器差不多，但是和均值滤波器不一样的地方就是核不同。均值滤波器的核每一个值都是相等，而高斯平滑滤波器的核内的数却是呈现高斯分布的。
(Gaussian smoothing filter is used to blur the image, and almost mean filter, and averaging filter but not the same place is a different core. Each core value averaging filter are equal, and a Gaussian smoothing filter nucleus is a Gaussian distribution.)