private void btnProcess_Click(object sender, RoutedEventArgs e)
{
double[,] matrix = new double[3, 3];
matrix[0, 0] = double.Parse(txt00.Text, CultureInfo.InvariantCulture);
matrix[0, 1] = double.Parse(txt01.Text, CultureInfo.InvariantCulture);
matrix[0, 2] = double.Parse(txt02.Text, CultureInfo.InvariantCulture);
matrix[1, 0] = double.Parse(txt10.Text, CultureInfo.InvariantCulture);
matrix[1, 1] = double.Parse(txt11.Text, CultureInfo.InvariantCulture);
matrix[1, 2] = double.Parse(txt12.Text, CultureInfo.InvariantCulture);
matrix[2, 0] = double.Parse(txt20.Text, CultureInfo.InvariantCulture);
matrix[2, 1] = double.Parse(txt21.Text, CultureInfo.InvariantCulture);
matrix[2, 2] = double.Parse(txt22.Text, CultureInfo.InvariantCulture);
GenericFilter sharpen = new GenericFilter();
sharpen.FilterName = "Sharpen";
sharpen.FilterMatrix = matrix;
//sharpen.FilterMatrix = new double[,] {{ 0.0, 0.2, 0.0 },
// { 0.2, 0.2, 0.2 },
// { 0.0, 0.2, 0.2 }};
resultImage = previewImage.ConvolutionFilter(sharpen);
image.Source = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(resultImage.GetHbitmap(), IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
previewImage = resultImage;
}