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

# maximumComponent()

Creates a maximum RGB grayscale image.

## Declaration

```swift
class func maximumComponent() -> any CIFilter & CIMaximumComponent
```

## Return Value

Return Value The modified image.

## Discussion

Discussion This method applies the maximum component filter to an image. The effect applies a preconfigured set of effects that result in the input image becoming grayscale using the maximum RGB color components. The maximum component filter uses the following property: The following code creates a filter that adds brightness and makes the input image grayscale: func maximumComponent(inputImage: CIImage) -> CIImage {     let maximumComponentFilter = CIFilter.maximumComponent()     maximumComponentFilter.inputImage = inputImage     return maximumComponentFilter.outputImage! }

## See Also

### Color Effect Filters

- [colorCrossPolynomial()](coreimage/cifilter-swift.class/colorcrosspolynomial().md)
- [colorCube()](coreimage/cifilter-swift.class/colorcube().md)
- [colorCubeWithColorSpace()](coreimage/cifilter-swift.class/colorcubewithcolorspace().md)
- [colorCubesMixedWithMask()](coreimage/cifilter-swift.class/colorcubesmixedwithmask().md)
- [colorCurves()](coreimage/cifilter-swift.class/colorcurves().md)
- [colorInvert()](coreimage/cifilter-swift.class/colorinvert().md)
- [colorMap()](coreimage/cifilter-swift.class/colormap().md)
- [colorMonochrome()](coreimage/cifilter-swift.class/colormonochrome().md)
- [colorPosterize()](coreimage/cifilter-swift.class/colorposterize().md)
- [convertLabToRGB()](coreimage/cifilter-swift.class/convertlabtorgb().md)
- [convertRGBtoLab()](coreimage/cifilter-swift.class/convertrgbtolab().md)
- [dither()](coreimage/cifilter-swift.class/dither().md)
- [documentEnhancer()](coreimage/cifilter-swift.class/documentenhancer().md)
- [falseColor()](coreimage/cifilter-swift.class/falsecolor().md)
- [labDeltaE()](coreimage/cifilter-swift.class/labdeltae().md)