' Converts Jpeg2000 file to Tiff file.
Public Shared Sub ConvertJpeg2000ToTiff(jpeg2000Filename As String, tiffFilename As String)
    Using stream As New System.IO.FileStream(jpeg2000Filename, System.IO.FileMode.Open, System.IO.FileAccess.Read)
        If Not Vintasoft.Imaging.Codecs.ImageFiles.Jpeg2000.Jpeg2000File.IsValidFormat(stream) Then
            Throw New System.ApplicationException()
        End If

        Dim image As Vintasoft.Imaging.VintasoftImage

        Using file As New Vintasoft.Imaging.Codecs.ImageFiles.Jpeg2000.Jpeg2000File(stream)
            image = file.Page.GetImage()
        End Using

        Dim tiffEncoder As New Vintasoft.Imaging.Codecs.Encoders.TiffEncoder()

        image.Save(tiffFilename, tiffEncoder)

        tiffEncoder.Dispose()

        image.Dispose()
    End Using
End Sub

// Converts Jpeg2000 file to Tiff file.
public static void ConvertJpeg2000ToTiff(string jpeg2000Filename, string tiffFilename)
{
    using (System.IO.FileStream stream = new System.IO.FileStream(
        jpeg2000Filename, System.IO.FileMode.Open, System.IO.FileAccess.Read))
    {
        if (!Vintasoft.Imaging.Codecs.ImageFiles.Jpeg2000.Jpeg2000File.IsValidFormat(stream))
        {
            throw new System.ApplicationException();
        }

        Vintasoft.Imaging.VintasoftImage image;

        using (Vintasoft.Imaging.Codecs.ImageFiles.Jpeg2000.Jpeg2000File file =
            new Vintasoft.Imaging.Codecs.ImageFiles.Jpeg2000.Jpeg2000File(stream))
        {
            image = file.Page.GetImage();
        }

        Vintasoft.Imaging.Codecs.Encoders.TiffEncoder tiffEncoder =
            new Vintasoft.Imaging.Codecs.Encoders.TiffEncoder();

        image.Save(tiffFilename, tiffEncoder);

        tiffEncoder.Dispose();

        image.Dispose();
    }
}