---
title: "UnsharpMask.Threshold Property "
canonical: https://www.graphicsmill.com/docs/gm/P_Aurigma_GraphicsMill_Transforms_UnsharpMask_Threshold.htm
product: "Graphics Mill"
---

# UnsharpMask.Threshold Property 
 
Gets or sets a threshold value for the unsharp mask.
 
**Namespace:** [Aurigma.GraphicsMill.Transforms](https://www.graphicsmill.com/docs/gm/N_Aurigma_GraphicsMill_Transforms.htm.md)
 **Assembly:** Aurigma.GraphicsMill (in Aurigma.GraphicsMill.dll)
 
## Syntax
  
```csharp
public float Threshold { get; set; }
```
 
### Property Value
The threshold value for the unsharp mask in range [0, 1]. The default value is `0`.1.
 
## Remarks
 Minimum value (0) means that all pixels are affected with unsharp mask, maximum value means that no pixels are affected. To calculate threshold in pixel luminosity levels, multiply it on 255 for non-extended (8 bit per channel) images, or 65535 for extended (16 bit per channel) images.
   
## See Also

### Reference

- [UnsharpMask Class](https://www.graphicsmill.com/docs/gm/T_Aurigma_GraphicsMill_Transforms_UnsharpMask.htm.md)
- [Aurigma.GraphicsMill.Transforms Namespace](https://www.graphicsmill.com/docs/gm/N_Aurigma_GraphicsMill_Transforms.htm.md)