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

# areaMinMax()

Calculates minimum and maximum color components for a specified area of the image.

## Declaration

```swift
class func areaMinMax() -> any CIFilter & CIAreaMinMax
```

## Return Value

Return Value A 2 x 1 pixel image containing the minimum and maximum color components.

## Discussion

Discussion This filter returns the maximum and minimum color components in the region defined by extent. The result is a 2 x 1 pixel image with the left pixel containing the minimum components and the right pixel containing the maximum components. The area min max filter uses the following properties: The following code creates a filter that results in a 2 x 1 image where the minimum components are in the left pixel and the maximum components are in the right pixel. func areaMinMax(inputImage: CIImage) -> CIImage {     let filter = CIFilter.areaMinMax()     filter.inputImage = inputImage     filter.extent = CGRect(        x: inputImage.extent.width/2-250,         y: inputImage.extent.height/2-250,         width: 500,         height: 500)     return filter.outputImage! }

## See Also

### Filters

- [areaAverage()](coreimage/cifilter-swift.class/areaaverage().md)
- [areaHistogram()](coreimage/cifilter-swift.class/areahistogram().md)
- [areaLogarithmicHistogram()](coreimage/cifilter-swift.class/arealogarithmichistogram().md)
- [areaMaximum()](coreimage/cifilter-swift.class/areamaximum().md)
- [areaMaximumAlpha()](coreimage/cifilter-swift.class/areamaximumalpha().md)
- [areaMinimum()](coreimage/cifilter-swift.class/areaminimum().md)
- [areaMinimumAlpha()](coreimage/cifilter-swift.class/areaminimumalpha().md)
- [areaMinMaxRed()](coreimage/cifilter-swift.class/areaminmaxred().md)
- [columnAverage()](coreimage/cifilter-swift.class/columnaverage().md)
- [histogramDisplay()](coreimage/cifilter-swift.class/histogramdisplay().md)
- [kMeans()](coreimage/cifilter-swift.class/kmeans().md)
- [rowAverage()](coreimage/cifilter-swift.class/rowaverage().md)