---
title: gaussianBlur()
framework: coreimage
role: symbol
role_heading: Type Method
path: coreimage/cifilter-swift.class/gaussianblur()
---

# gaussianBlur()

Blurs an image with a Gaussian distribution pattern.

## Declaration

```swift
class func gaussianBlur() -> any CIFilter & CIGaussianBlur
```

## Return Value

Return Value The blurred image.

## Discussion

Discussion This method applies a Gaussian blur filter to an image. The effect targets the pixels within a circle defined by a radius and uses Gaussian ditribution to blur the image from the center out. The Gaussian blur filter uses the following properties: The following code creates a filter that adds a heavy blur to the input image:     func gaussianBlur(inputImage: CIImage) -> CIImage? {

let gaussianBlurFilter = CIFilter.gaussianBlur()         gaussianBlurFilter.inputImage = inputImage         gaussianBlurFilter.radius = 10         return gaussianBlurFilter.outputImage     }

## See Also

### Filters

- [bokehBlur()](coreimage/cifilter-swift.class/bokehblur().md)
- [boxBlur()](coreimage/cifilter-swift.class/boxblur().md)
- [discBlur()](coreimage/cifilter-swift.class/discblur().md)
- [maskedVariableBlur()](coreimage/cifilter-swift.class/maskedvariableblur().md)
- [median()](coreimage/cifilter-swift.class/median().md)
- [morphologyGradient()](coreimage/cifilter-swift.class/morphologygradient().md)
- [morphologyMaximum()](coreimage/cifilter-swift.class/morphologymaximum().md)
- [morphologyMinimum()](coreimage/cifilter-swift.class/morphologyminimum().md)
- [morphologyRectangleMaximum()](coreimage/cifilter-swift.class/morphologyrectanglemaximum().md)
- [morphologyRectangleMinimum()](coreimage/cifilter-swift.class/morphologyrectangleminimum().md)
- [motionBlur()](coreimage/cifilter-swift.class/motionblur().md)
- [noiseReduction()](coreimage/cifilter-swift.class/noisereduction().md)
- [zoomBlur()](coreimage/cifilter-swift.class/zoomblur().md)