public SpectrumDisplay(System.Drawing.Image input)
{
InitializeComponent();
this.input = new Bitmap(input);
InputImage.Image = input;
Cursor.Current = Cursors.WaitCursor;
ToolStripStatusLabel.Visible = true;
StatusBarProgressBar.Visible = true;
SpectraWorker.RunWorkerAsync();
}
private void SpectraWorker_DoWork(object sender, DoWorkEventArgs e)
{
if (input.Width != input.Height)
{
throw new System.ApplicationException(
"The image height and width must be the same.");
}
SpectraWorker.ReportProgress(0, "Computing spectra");
// The AForge FFT requires an 8 bits per pixel input format.
Bitmap gray_8bpp
= AForge.Imaging.Filters.Grayscale.CommonAlgorithms.Y.Apply(input);
AForge.Imaging.ComplexImage fft
= ComplexImage.FromBitmap(gray_8bpp);
fft.ForwardFourierTransform();
SpectraWorker.ReportProgress(100, "Fourier Spectra Calculated.");
fourier = fft.ToBitmap();
}
