//this is the blackman harris windowing function that will do a windowed
//dft on the selection of the data.
private void blackmanHarrisToolStripMenuItem_Click(object sender, EventArgs e)
{
double[] windowWave = WindowingClass.BlackmanHarrisWindow(selectedWave());
double[] sendDataWave = new double[dataWave.Length];
for (int i = 0; i < dataWave.Length; i++)
{
sendDataWave[i] = dataWave[i];
}
WindowForm newMDIChild = new WindowForm();
newMDIChild.DataWave = sendDataWave;
newMDIChild.WindowWave = windowWave;
// Set the Parent Form of the Child window.
newMDIChild.MdiParent = this.MdiParent;
newMDIChild.Show();
}
//this is the hamming windowing function that will do a windowed
//dft on the selection of the data.
private void hammingToolStripMenuItem_Click(object sender, EventArgs e)
{
double[] windowWave = WindowingClass.HammingWindow(selectedWave());
double[] sendDataWave = new double[dataWave.Length];
for (int i = 0; i < dataWave.Length; i++)
{
sendDataWave[i] = dataWave[i];
}
WindowForm newMDIChild = new WindowForm();
newMDIChild.WaveHeader = wavhdrW;
newMDIChild.DataWave = sendDataWave;
newMDIChild.WindowWave = windowWave;
// Set the Parent Form of the Child window.
newMDIChild.MdiParent = this.MdiParent;
// Display the new form.
newMDIChild.Show();
}
private void highPassToolStripMenuItem_Click(object sender, EventArgs e)
{
//this is where the 1-0 mask is designed.
var filterWeights = new complex[windowWave.Length];
if ((windowWave.Length % 2) != 0)
{
filterWeights[(filterWeights.Length / 2)] = new complex(1, 1);
}
for (int i = 0; i < filterWeights.Length / 2; i++)
{
if (i > (int)chart1.ChartAreas[0].CursorX.SelectionStart)
{
filterWeights[i] = new complex(1, 1);
filterWeights[filterWeights.Length - i - 1] = new complex(1, 1);
}
else
{
filterWeights[i] = new complex(0, 0);
filterWeights[filterWeights.Length - i - 1] = new complex(0, 0);
}
}
//after the 1-0 mask is designed, it will iDFT it, window it,
//then convolve it across the original data and finally send
//it to a form2 to be displayed.
if (windowtype == 1)
{
convolver(WindowingClass.TriangleWindow(transform.inverseDFT(filterWeights)));
}
else if (windowtype == 2)
{
convolver(WindowingClass.BlackmanHarrisWindow(transform.inverseDFT(filterWeights)));
}
else if (windowtype == 3)
{
convolver(WindowingClass.HammingWindow(transform.inverseDFT(filterWeights)));
}
else
{
convolver(transform.inverseDFT(filterWeights));
}
}