---
title: kCGImagePropertyPNGGamma
framework: imageio
role: symbol
role_heading: Global Variable
path: imageio/kcgimagepropertypnggamma
---

# kCGImagePropertyPNGGamma

The gamma value.

## Declaration

```swift
let kCGImagePropertyPNGGamma: CFString
```

## See Also

### Image Properties

- [kCGImagePropertyAPNGCanvasPixelHeight](imageio/kcgimagepropertyapngcanvaspixelheight.md)
- [kCGImagePropertyAPNGCanvasPixelWidth](imageio/kcgimagepropertyapngcanvaspixelwidth.md)
- [kCGImagePropertyPNGXPixelsPerMeter](imageio/kcgimagepropertypngxpixelspermeter.md)
- [kCGImagePropertyPNGYPixelsPerMeter](imageio/kcgimagepropertypngypixelspermeter.md)
- [kCGImagePropertyPNGInterlaceType](imageio/kcgimagepropertypnginterlacetype.md)
- [kCGImagePropertyPNGsRGBIntent](imageio/kcgimagepropertypngsrgbintent.md)
- [kCGImagePropertyPNGChromaticities](imageio/kcgimagepropertypngchromaticities.md)