---
title: "applyingFilter(_:)"
framework: coreimage
role: symbol
role_heading: Instance Method
path: "coreimage/ciimage/applyingfilter(_:)"
---

# applyingFilter(_:)

Applies the filter to an image and returns the output.

## Declaration

```swift
func applyingFilter(_ filterName: String) -> CIImage
```

## Discussion

Discussion A convenience method for applying a single filter to the method receiver and returning the output image.  Identical to applyingFilter(_:parameters:) with default parameters. important: This method, though convenient, is inefficient if used multiple times in succession. Achieve better performance by chaining filters without asking for the outputs of individual filters. For more information, see Processing an Image Using Built-in Filters.

## See Also

### Creating an Image by Modifying an Existing Image

- [applyingFilter(_:parameters:)](coreimage/ciimage/applyingfilter(_:parameters:).md)
- [transformed(by:)](coreimage/ciimage/transformed(by:).md)
- [transformed(by:highQualityDownsample:)](coreimage/ciimage/transformed(by:highqualitydownsample:).md)
- [cropped(to:)](coreimage/ciimage/cropped(to:).md)
- [oriented(forExifOrientation:)](coreimage/ciimage/oriented(forexiforientation:).md)
- [clampedToExtent()](coreimage/ciimage/clampedtoextent().md)
- [clamped(to:)](coreimage/ciimage/clamped(to:).md)
- [composited(over:)](coreimage/ciimage/composited(over:).md)
- [convertingWorkingSpaceToLab()](coreimage/ciimage/convertingworkingspacetolab().md)
- [convertingLabToWorkingSpace()](coreimage/ciimage/convertinglabtoworkingspace().md)
- [matchedToWorkingSpace(from:)](coreimage/ciimage/matchedtoworkingspace(from:).md)
- [matchedFromWorkingSpace(to:)](coreimage/ciimage/matchedfromworkingspace(to:).md)
- [premultiplyingAlpha()](coreimage/ciimage/premultiplyingalpha().md)
- [unpremultiplyingAlpha()](coreimage/ciimage/unpremultiplyingalpha().md)
- [settingAlphaOne(in:)](coreimage/ciimage/settingalphaone(in:).md)