private unsafe void miGaussianBlur_Click(object sender, System.EventArgs e)
{
if (this.ActiveCImage == null)
{
return;
}
CImage cimage = this.ActiveCImage;
float scale = 1f / (float)Math.Sqrt(cimage.Width * cimage.Height);
ComplexF[] data = cimage.Data;
Fourier.FFT3(data, cimage.Width, cimage.Height, 1, FourierDirection.Forward);
for (int i = 0; i < data.Length; i++)
{
data[i] *= scale;
}
Fourier.FFT3(data, cimage.Width, cimage.Height, 1, FourierDirection.Backward);
for (int i = 0; i < data.Length; i++)
{
data[i] *= scale;
}
cimage.FrequencySpace = true;
this.ActiveCImage = cimage;
}
private void miOpen_Click(object sender, System.EventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = "Image Files(*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|All files (*.*)|*.*";
if (ofd.ShowDialog(this) != DialogResult.OK)
{
return;
}
try {
this.ActiveCImage = new CImage(ofd.FileName);
}
catch (Exception ex) {
MessageBox.Show(this, "Error opening file '" + ofd.FileName + " because '" + ex.Message + " (" + ex.GetType().Name + ")'.", "Open...", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private void miBackwardFFT_Click(object sender, System.EventArgs e)
{
if (this.ActiveCImage == null)
{
return;
}
CImage cimage = this.ActiveCImage;
float scale = 1f / (float)Math.Sqrt(cimage.Width * cimage.Height);
ComplexF[] data = cimage.Data;
Fourier.FFT2(data, cimage.Width, cimage.Height, FourierDirection.Backward);
int offset = 0;
for (int y = 0; y < cimage.Height; y++)
{
for (int x = 0; x < cimage.Width; x++)
{
if (((x + y) & 0x1) != 0)
{
data[offset] *= -1;
}
offset++;
}
}
cimage.FrequencySpace = false;
for (int i = 0; i < data.Length; i++)
{
data[i] *= scale;
}
this.ActiveCImage = cimage;
}
private void miExit_Click(object sender, System.EventArgs e)
{
this.ActiveCImage = null;
Application.Exit();
}
private void miClose_Click(object sender, System.EventArgs e)
{
this.ActiveCImage = null;
}
private void miOpen_Click(object sender, System.EventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = "Image Files(*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|All files (*.*)|*.*";
if( ofd.ShowDialog( this ) != DialogResult.OK ) {
return;
}
try {
this.ActiveCImage = new CImage( ofd.FileName );
}
catch( Exception ex ) {
MessageBox.Show( this, "Error opening file '" + ofd.FileName + " because '" + ex.Message + " (" + ex.GetType().Name + ")'.", "Open...", MessageBoxButtons.OK, MessageBoxIcon.Error );
}
}
private unsafe void miGaussianBlur_Click(object sender, System.EventArgs e)
{
if( this.ActiveCImage == null ) {
return;
}
CImage cimage = this.ActiveCImage;
float scale = 1f / (float) Math.Sqrt( cimage.Width * cimage.Height );
ComplexF[] data = cimage.Data;
Fourier.FFT3( data, cimage.Width, cimage.Height, 1, FourierDirection.Forward );
for( int i = 0; i < data.Length; i ++ ) {
data[i] *= scale;
}
Fourier.FFT3( data, cimage.Width, cimage.Height, 1, FourierDirection.Backward );
for( int i = 0; i < data.Length; i ++ ) {
data[i] *= scale;
}
cimage.FrequencySpace = true;
this.ActiveCImage = cimage;
}
private void miForwardFFT_Click(object sender, System.EventArgs e)
{
if( this.ActiveCImage == null ) {
return;
}
CImage cimage = this.ActiveCImage;
float scale = 1f / (float) Math.Sqrt( cimage.Width * cimage.Height );
ComplexF[] data = cimage.Data;
int offset = 0;
for( int y = 0; y < cimage.Height; y ++ ) {
for( int x = 0; x < cimage.Width; x ++ ) {
if( (( x + y ) & 0x1 ) != 0 ) {
data[ offset ] *= -1;
}
offset++;
}
}
Fourier.FFT2( data, cimage.Width, cimage.Height, FourierDirection.Forward );
cimage.FrequencySpace = true;
for( int i = 0; i < data.Length; i ++ ) {
data[i] *= scale;
}
this.ActiveCImage = cimage;
}
private void miExit_Click(object sender, System.EventArgs e)
{
this.ActiveCImage = null;
Application.Exit();
}
private void miClose_Click(object sender, System.EventArgs e)
{
this.ActiveCImage = null;
}
