---
title: CVImageTransferFunction
framework: corevideo
role: symbol
role_heading: Enumeration
path: corevideo/cvimagetransferfunction
---

# CVImageTransferFunction

The transfer function describes the tonality of an image for use in color matching operations. This value is used along with a color primaries gamut CVImageColorPrimaries. Most apps should use the CVImageTransferFunction.itu_R_709_2 transfer function.

## Declaration

```swift
enum CVImageTransferFunction
```

## Topics

### Enumeration Cases

- [CVImageTransferFunction.itu_R_2020](corevideo/cvimagetransferfunction/itu_r_2020.md)
- [CVImageTransferFunction.itu_R_2100_HLG](corevideo/cvimagetransferfunction/itu_r_2100_hlg.md)
- [CVImageTransferFunction.itu_R_709_2](corevideo/cvimagetransferfunction/itu_r_709_2.md)
- [CVImageTransferFunction.linear](corevideo/cvimagetransferfunction/linear.md)
- [CVImageTransferFunction.sRGB](corevideo/cvimagetransferfunction/srgb.md)
- [CVImageTransferFunction.smpte_240M_1995](corevideo/cvimagetransferfunction/smpte_240m_1995.md)
- [CVImageTransferFunction.smpte_ST_2084_PQ](corevideo/cvimagetransferfunction/smpte_st_2084_pq.md)
- [CVImageTransferFunction.smpte_ST_428_1](corevideo/cvimagetransferfunction/smpte_st_428_1.md)
- [CVImageTransferFunction.useGamma](corevideo/cvimagetransferfunction/usegamma.md)

## Relationships

### Conforms To

- [CVAttachmentValueRepresentable](corevideo/cvattachmentvaluerepresentable.md)
- [Copyable](swift/copyable.md)
- [Equatable](swift/equatable.md)
- [Escapable](swift/escapable.md)
- [Hashable](swift/hashable.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Color and signal characteristics

- [CVImageColorPrimaries](corevideo/cvimagecolorprimaries.md)
- [CVImageLogTransferFunction](corevideo/cvimagelogtransferfunction.md)
- [CVImageYCbCrMatrix](corevideo/cvimageycbcrmatrix.md)
- [CVImageAlphaChannelMode](corevideo/cvimagealphachannelmode.md)
- [CVImageFieldDetail](corevideo/cvimagefielddetail.md)