---
title: "RedEyeRemoval..::.RedChannelThreshold Property "
canonical: https://www.graphicsmill.com/docs/gm5/P_Aurigma_GraphicsMill_Transforms_RedEyeRemoval_RedChannelThreshold.htm
product: "Graphics Mill 5.5 for .NET"
---

This documentation is for the old version. [Go to the latest Graphics Mill docs](https://www.graphicsmill.com/docs/gm/)

# RedEyeRemoval.RedChannelThreshold Property 
 
Gets/sets the red channel threshold value used when removing the red eyes effect.
 
**Namespace:** [Aurigma.GraphicsMill.Transforms](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill_Transforms.htm.md)
 **Assembly:** Aurigma.GraphicsMill (in Aurigma.GraphicsMill.dll)
 
## Syntax
  
```
Public Property RedChannelThreshold As Single
```
 
```csharp
public float RedChannelThreshold { get; set; }
```
 
### Property Value
A float value in range [0,1] which specifies the red channel threshold.
 
## Remarks
  
When you use values which are close to 0, the algorithm will capture a lot of pixels (even those which are unlikely to be red). It will highly reduce the performance and increase a number of false recognitions. Too high values may lead to reducing of probability of red eye removal. It is highly recommended to use default value of this property and adjust it only if it is actually necessary.
 
This property affects both for [Manual](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Transforms_RedEyeRemovalMode.htm.md) and [Semiautomatic](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Transforms_RedEyeRemovalMode.htm.md) mode.
   
## See Also

### Reference

- [RedEyeRemoval Class](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Transforms_RedEyeRemoval.htm.md)
- [Aurigma.GraphicsMill.Transforms Namespace](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill_Transforms.htm.md)