---
title: kCIInputMaskImageKey
framework: coreimage
role: symbol
role_heading: Global Variable
path: coreimage/kciinputmaskimagekey
---

# kCIInputMaskImageKey

A key for a CIImage object to use as a mask.

## Declaration

```swift
let kCIInputMaskImageKey: String
```

## See Also

### Constants

- [constrainedHigh](coreimage/cidynamicrangeoption/constrainedhigh.md)
- [high](coreimage/cidynamicrangeoption/high.md)
- [standard](coreimage/cidynamicrangeoption/standard.md)
- [kCIInputAmountKey](coreimage/kciinputamountkey.md)
- [kCIInputAngleKey](coreimage/kciinputanglekey.md)
- [kCIInputAspectRatioKey](coreimage/kciinputaspectratiokey.md)
- [kCIInputBackgroundImageKey](coreimage/kciinputbackgroundimagekey.md)
- [kCIInputBacksideImageKey](coreimage/kciinputbacksideimagekey.md)
- [kCIInputBiasVectorKey](coreimage/kciinputbiasvectorkey.md)
- [kCIInputBrightnessKey](coreimage/kciinputbrightnesskey.md)
- [kCIInputCenterKey](coreimage/kciinputcenterkey.md)
- [kCIInputColorKey](coreimage/kciinputcolorkey.md)
- [kCIInputColor0Key](coreimage/kciinputcolor0key.md)
- [kCIInputColor1Key](coreimage/kciinputcolor1key.md)
- [kCIInputColorSpaceKey](coreimage/kciinputcolorspacekey.md)