---
title: Filter Parameter Keys
framework: coreimage
role: collectionGroup
role_heading: API Collection
path: coreimage/filter-parameter-keys
---

# Filter Parameter Keys

Keys for input parameters to filters.

## Overview

Overview These keys represent some of the most commonly used input parameters. A filter can use other kinds of input parameters.

## Topics

### 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)
- [kCIInputContrastKey](coreimage/kciinputcontrastkey.md)
- [kCIInputCountKey](coreimage/kciinputcountkey.md)
- [kCIInputDepthImageKey](coreimage/kciinputdepthimagekey.md)
- [kCIInputDisparityImageKey](coreimage/kciinputdisparityimagekey.md)
- [kCIInputEVKey](coreimage/kciinputevkey.md)
- [kCIInputExtentKey](coreimage/kciinputextentkey.md)
- [kCIInputExtrapolateKey](coreimage/kciinputextrapolatekey.md)
- [kCIInputGradientImageKey](coreimage/kciinputgradientimagekey.md)
- [kCIInputImageKey](coreimage/kciinputimagekey.md)
- [kCIInputIntensityKey](coreimage/kciinputintensitykey.md)
- [kCIInputMaskImageKey](coreimage/kciinputmaskimagekey.md)
- [kCIInputMatteImageKey](coreimage/kciinputmatteimagekey.md)
- [kCIInputPaletteImageKey](coreimage/kciinputpaletteimagekey.md)
- [kCIInputPerceptualKey](coreimage/kciinputperceptualkey.md)
- [kCIInputPoint0Key](coreimage/kciinputpoint0key.md)
- [kCIInputPoint1Key](coreimage/kciinputpoint1key.md)
- [kCIInputRadiusKey](coreimage/kciinputradiuskey.md)
- [kCIInputRadius0Key](coreimage/kciinputradius0key.md)
- [kCIInputRadius1Key](coreimage/kciinputradius1key.md)
- [kCIInputRefractionKey](coreimage/kciinputrefractionkey.md)
- [kCIInputSaturationKey](coreimage/kciinputsaturationkey.md)
- [kCIInputScaleKey](coreimage/kciinputscalekey.md)
- [kCIInputShadingImageKey](coreimage/kciinputshadingimagekey.md)
- [kCIInputSharpnessKey](coreimage/kciinputsharpnesskey.md)
- [kCIInputTargetImageKey](coreimage/kciinputtargetimagekey.md)
- [kCIInputThresholdKey](coreimage/kciinputthresholdkey.md)
- [kCIInputTimeKey](coreimage/kciinputtimekey.md)
- [kCIInputTransformKey](coreimage/kciinputtransformkey.md)
- [kCIInputVersionKey](coreimage/kciinputversionkey.md)
- [kCIInputWeightsKey](coreimage/kciinputweightskey.md)
- [kCIInputWidthKey](coreimage/kciinputwidthkey.md)
- [kCIOutputImageKey](coreimage/kcioutputimagekey.md)

### Deprecated

- [baselineExposure](coreimage/cirawfilteroption/baselineexposure.md)
- [disableGamutMap](coreimage/cirawfilteroption/disablegamutmap.md)
- [moireAmount](coreimage/cirawfilteroption/moireamount.md)

## See Also

### Constants

- [Filter Attribute Keys](coreimage/filter-attribute-keys.md)
- [Data Type Attributes](coreimage/data-type-attributes.md)
- [Vector Quantity Attributes](coreimage/vector-quantity-attributes.md)
- [Color Attribute Keys](coreimage/color-attribute-keys.md)
- [Image Attribute Keys](coreimage/image-attribute-keys.md)
- [Filter Category Keys](coreimage/filter-category-keys.md)
- [Options for Applying a Filter](coreimage/options-for-applying-a-filter.md)
- [User Interface Control Options](coreimage/user-interface-control-options.md)
- [User Interface Options](coreimage/user-interface-options.md)
- [RAW Image Options](coreimage/raw-image-options.md)