Information in this article applies to:
Article ID: NFL1047 — Created: 5 May 2017 — Reviewed: 13 Dec 2020
What does the Gaussian Blur filter do?
The Gaussian blur filter has the effect of blurring an image. It is a popular filter effect that is used to reduce image noise and detail. It is a convolution that uses a Gaussian kernel to blur the image pixels.
Gaussian Blur Filter — Before
Gaussian Blur Filter — After
You can specify the kernel size (the height and width of the array of pixels to consider) and the Sigma (the standard deviation for the Gaussian function used the calculate the kernel).
Gaussian blurring can have a dramatic effect on the resulting image and can make it virtually useless (other than for artistic purposes). However, it can also reduce noise in the resulting image.
A technique that may have merit involves blurring an image before and/or after sharpening it to reduce artifacts.
This filter is available only for Deep Zoom filter sequences.