---
title: "Histogram..::.BuildLuminosity Method (BitmapData)"
canonical: https://www.graphicsmill.com/docs/gm5/M_Aurigma_GraphicsMill_Histogram_BuildLuminosity_1_ed2555df.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/)

# Histogram.BuildLuminosity Method (BitmapData)
 
Builds the histogram for specified bitmap data. Histogram is based on pixels luminosity.
 
**Namespace:** [Aurigma.GraphicsMill](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill.htm.md)
 **Assembly:** Aurigma.GraphicsMill (in Aurigma.GraphicsMill.dll)
 
## Syntax
  
```
Public Sub BuildLuminosity ( _bitmapData As BitmapData _
)
```
 
```csharp
public void BuildLuminosity(BitmapData bitmapData
)
```
 
### Parameters
 
 - bitmapData
     - Type: [Aurigma.GraphicsMill.BitmapData](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_BitmapData.htm.md)
 [BitmapData](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_BitmapData.htm.md) class instance to build the histogram for.
   
## See Also

### Reference

- [Histogram Class](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Histogram.htm.md)
- [BuildLuminosity Overload](https://www.graphicsmill.com/docs/gm5/O_T_Aurigma_GraphicsMill_Histogram_BuildLuminosity.htm.md)
- [Aurigma.GraphicsMill Namespace](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill.htm.md)