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# CIToneCurve

The properties you use to configure a tone curve filter.

```
protocol CIToneCurve : CIFilterProtocol
```

## Topics

### Instance Properties

[`inputImage`](/documentation/CoreImage/CIToneCurve/inputImage)

The image to use as an input image.

[`point0`](/documentation/CoreImage/CIToneCurve/point0)

A vector containing the position of the first point of the tone curve.

[`point1`](/documentation/CoreImage/CIToneCurve/point1)

A vector containing the position of the second point of the tone curve.

[`point2`](/documentation/CoreImage/CIToneCurve/point2)

A vector containing the position of the third point of the tone curve.

[`point3`](/documentation/CoreImage/CIToneCurve/point3)

A vector containing the position of the fourth point of the tone curve.

[`point4`](/documentation/CoreImage/CIToneCurve/point4)

A vector containing the position of the fifth point of the tone curve.

## See Also

[`toneCurve()`](/documentation/CoreImage/CIFilter-swift.class/toneCurve())

Alters an image’s tone curve according to a series of data points.


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