---
title: CIAreaHistogram
framework: coreimage
role: symbol
role_heading: Protocol
path: coreimage/ciareahistogram
---

# CIAreaHistogram

## Declaration

```swift
protocol CIAreaHistogram : CIAreaReductionFilter
```

## Topics

### Instance Properties

- [count](coreimage/ciareahistogram/count.md)
- [scale](coreimage/ciareahistogram/scale.md)

## Relationships

### Inherits From

- [CIAreaReductionFilter](coreimage/ciareareductionfilter.md)
- [CIFilterProtocol](coreimage/cifilterprotocol.md)

## See Also

### Protocols

- [CIAreaAverage](coreimage/ciareaaverage.md)
- [CIAreaLogarithmicHistogram](coreimage/ciarealogarithmichistogram.md)
- [CIAreaMaximum](coreimage/ciareamaximum.md)
- [CIAreaMaximumAlpha](coreimage/ciareamaximumalpha.md)
- [CIAreaMinMax](coreimage/ciareaminmax.md)
- [CIAreaMinMaxRed](coreimage/ciareaminmaxred.md)
- [CIAreaMinimum](coreimage/ciareaminimum.md)
- [CIAreaMinimumAlpha](coreimage/ciareaminimumalpha.md)
- [CIAreaReductionFilter](coreimage/ciareareductionfilter.md)
- [CIColumnAverage](coreimage/cicolumnaverage.md)
- [CIHistogramDisplay](coreimage/cihistogramdisplay.md)
- [CIKMeans](coreimage/cikmeans.md)
- [CIRowAverage](coreimage/cirowaverage.md)