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+---
+title: images.GaussianBlur
+description: Returns an image filter that applies a gaussian blur to an image.
+categories: []
+keywords: []
+params:
+  functions_and_methods:
+    aliases: []
+    returnType: images.filter
+    signatures: [images.GaussianBlur SIGMA]
+---
+
+The sigma value must be positive, and indicates how much the image will be blurred. The blur-affected radius is approximately 3 times the sigma value.
+
+## Usage
+
+Create the filter:
+
+```go-html-template
+{{ $filter := images.GaussianBlur 5 }}
+```
+
+{{% include "/_common/functions/images/apply-image-filter.md" %}}
+
+## Example
+
+{{< img
+  src="images/examples/zion-national-park.jpg"
+  alt="Zion National Park"
+  filter="GaussianBlur"
+  filterArgs="5"
+  example=true
+>}}