Gaussian blur:
A Gaussian blur (also known as Gaussian smoothing) is the result of blurring an image by a Gaussian function.
en.wikipedia.org
高斯模糊:
高斯模糊（英语：Gaussian Blur），也叫高斯平滑，是在Adobe Photoshop、GIMP以及Paint.NET等图像处理软件中广泛使用的处理效果，通常用它来减少图像雜訊以及降低细节层次。
zh.wikipedia.org
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Gaussian blur高斯模糊