---
title: FxHistogramChannel
framework: Professional Video Applications
role: symbol
role_heading: Type Alias
platforms: [fxplug 3.1+]
path: professional_video_applications/fxhistogramchannel
---

# FxHistogramChannel

Constants used to identify which channel a histogram operation should apply to.

## Declaration

```swift
typealias FxHistogramChannel = Int
```

## Topics

### Constants

- [kFxHistogramChannel_RGB](professional_video_applications/kfxhistogramchannel_rgb.md)
- [kFxHistogramChannel_Red](professional_video_applications/kfxhistogramchannel_red.md)
- [kFxHistogramChannel_Green](professional_video_applications/kfxhistogramchannel_green.md)
- [kFxHistogramChannel_Blue](professional_video_applications/kfxhistogramchannel_blue.md)
- [kFxHistogramChannel_Alpha](professional_video_applications/kfxhistogramchannel_alpha.md)

## See Also

### Constants

- [FxParameterFlags](professional_video_applications/fxparameterflags.md)