private void convolutionButton_Click(object sender, EventArgs e)

{

    Bitmap grayscale = grayscaleImagePictureBox.Image as Bitmap;

    Complex[, ] comp = ImageDataConverter.BitmapToComplex2D(grayscale);

    int kernelWidth = grayscale.Width;

    int kernelHeight = grayscale.Height;

    KassWitkinBandpassFilter filter = new KassWitkinBandpassFilter();

    filter.Dh = 256;

    filter.Dv = 64;

    filter.CenterX = kernelWidth / 2;

    filter.CenterY = kernelHeight / 2;

    filter.Theta = 0.9;

    filter.ApplyFilter(comp);

    Bitmap again = ImageDataConverter.Complex2DToBitmap(comp, false);

    convolutionPictureBox.Image = again as Image;

}