---
title: "Jpeg2kWriter Class"
canonical: https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Codecs_Jpeg2kWriter.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/)

# Jpeg2kWriter Class
 
This class enables you to write JPEG2000 images.
 
**Namespace:** [Aurigma.GraphicsMill.Codecs](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill_Codecs.htm.md)
 **Assembly:** Aurigma.GraphicsMill (in Aurigma.GraphicsMill.dll)
 
## Syntax
  
```
Public NotInheritable Class Jpeg2kWriter _Inherits FormatWriter
```
 
```csharp
public sealed class Jpeg2kWriter : FormatWriter
```
 
## Remarks
  
JPEG2000 is an image format which implements wavelet-based compression algorithm. This algorithm provides high compression ratio with better quality than JPEG. This compression is also lossy, however JPEG2000 artifacts are looking visually better comparing to JPEG.
 
Graphics Mill for .NET can save bitmaps to JPEG2000 format in two color spaces:
 
- RGB;
- Grayscale;

These bitmaps can be both extended (16 bit per channel) and non-extended (8 bit per channel). Also, these bitmaps may contain an alpha channel.
 
## Examples
  
You can use Jpeg2kWriter class instead of the [Save(String, IEncoderOptions)](https://www.graphicsmill.com/docs/gm5/M_Aurigma_GraphicsMill_Bitmap_Save_2_b73a8298.htm.md) method of the [Bitmap](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Bitmap.htm.md). In particular it enables you to save the image asynchronously.
 
The Jpeg2kWriter class usage is demonstrated below:
 
```
Dim bitmap As New Aurigma.GraphicsMill.Bitmap("c:\Mountain.jpg")

Dim writer As New Aurigma.GraphicsMill.Codecs.Jpeg2kWriter("C:\Mountain2.jp2")

Dim frame As New Aurigma.GraphicsMill.Codecs.Jpeg2kFrame
frame.Rate = 0.1
frame.SetBitmap(bitmap)

bitmap.Dispose()

writer.AddFrame(frame)

frame.Dispose()

writer.Dispose()
```
 
```csharp
using (Aurigma.GraphicsMill.Bitmap bitmap = 
            new Aurigma.GraphicsMill.Bitmap(@"c:\Mountain.jpg"))
{
    using (Aurigma.GraphicsMill.Codecs.Jpeg2kWriter writer = 
        new Aurigma.GraphicsMill.Codecs.Jpeg2kWriter())
    {
        writer.Open(@"C:\Mountain2.jp2");

        using (Aurigma.GraphicsMill.Codecs.Jpeg2kFrame frame = 
                    new Aurigma.GraphicsMill.Codecs.Jpeg2kFrame())
        {
            frame.Rate = 0.1f;
            frame.SetBitmap(bitmap);

            writer.AddFrame(frame);
        }
    }
}
```
 
## Inheritance Hierarchy
  
- [System.Object](http://msdn2.microsoft.com/en-us/e5kfa45b)
    - [Aurigma.GraphicsMill.SyncHandler](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_SyncHandler.htm.md)
        - [Aurigma.GraphicsMill.Codecs.FormatWriter](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Codecs_FormatWriter.htm.md)
            - Aurigma.GraphicsMill.Codecs.Jpeg2kWriter
 
## Thread Safety
 Static members of this type are safe for multi-threaded operations. Instance members of this type are safe for multi-threaded operations.
 
## Object Model

[![](https://www.graphicsmill.com/docs/gm5/Aurigma.GraphicsMill_ObjectModel_171.png)](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Codecs_Jpeg2kWriter.htm.md)
![](https://www.graphicsmill.com/docs/gm5/ObjectModel2.png)[![](https://www.graphicsmill.com/docs/gm5/Aurigma.GraphicsMill_ObjectModel_107.png)](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Codecs_IEncoderOptions.htm.md)
![](https://www.graphicsmill.com/docs/gm5/ObjectModel1.png)[![](https://www.graphicsmill.com/docs/gm5/Aurigma.GraphicsMill_ObjectModel_108.png)](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Codecs_IFrame.htm.md)
 
## Supported Pixel Formats

| Member Name | Description |
| --- | --- |
| **Format8bppGrayScale** | 8 bits per pixel. Grayscale. 8 bits are used for luminosity level. |
| **Format16bppGrayScale** | 16 bits per pixel. Grayscale. All 16 bits are used for luminosity level (extended pixel format). |
| **Format16bppAGrayScale** | 16 bits per pixel. Grayscale with alpha channel. 8 bits are used for alpha channel and other 8 bits are used for luminosity level. |
| **Format32bppAGrayScale** | 32 bits per pixel. Grayscale with alpha channel. 16 bits are used for alpha channel and other 16 bits are used for luminosity level (extended pixel format). |
| **Format24bppRgb** | 24 bits per pixel. RGB. 8 bits each are used for the red, green, and blue components. |
| **Format32bppArgb** | 32 bits per pixel. RGB with alpha channel. 8 bits each are used for the alpha, red, green, and blue components. |
| **Format48bppRgb** | 48 bits per pixel. RGB. 16 bits each are used for the red, green, and blue components (extended pixel format). |
| **Format64bppArgb** | 64 bits per pixel. RGB with alpha channel. 16 bits each are used for the alpha, red, green, and blue components (extended pixel format). |
 
## See Also

### Reference

- [Jpeg2kWriter Members](https://www.graphicsmill.com/docs/gm5/AllMembers_T_Aurigma_GraphicsMill_Codecs_Jpeg2kWriter.htm.md)
- [Aurigma.GraphicsMill.Codecs Namespace](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill_Codecs.htm.md)