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

# discBlur()

Applies a circle-shaped blur to an area of an image.

## Declaration

```swift
class func discBlur() -> any CIFilter & CIDiscBlur
```

## Return Value

Return Value The blurred image.

## Discussion

Discussion This method applies the disc blur filter to an image. The effect targets the pixels within a circle defined by a radius and calculates the median color value to create to the output image. The disc blur filter uses the following properties: The following code creates a filter that adds a strong blur to the input image:     func discBlur(inputImage: CIImage) -> CIImage? {

let discBlurFilter = CIFilter.discBlur()         discBlurFilter.inputImage = inputImage         discBlurFilter.radius = 8         return discBlurFilter.outputImage     }

## See Also

### Filters

- [bokehBlur()](coreimage/cifilter-swift.class/bokehblur().md)
- [boxBlur()](coreimage/cifilter-swift.class/boxblur().md)
- [gaussianBlur()](coreimage/cifilter-swift.class/gaussianblur().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)