Converting byte array back into iplimage

gistfile1.txt

BitmapSource bitmap = BitmapSource.Create(
    640, 480,
    96, 96, pf, null,
    buffer, rawStride);

// save image to stream 
MemoryStream ms = new MemoryStream();
BitmapEncoder encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(bitmap));
encoder.Save(ms);
ms.Seek(0, SeekOrigin.Begin);

// load as a System.Drawing.Bitmap 
System.Drawing.Bitmap b = new System.Drawing.Bitmap(ms);

IplImage ipl = b.ToIplImage();
Cv.ShowImage("Object Segmentation", ipl);