public unsafe static void ShowTransformedImage(WriteableBitmap image, TransformStrategy transformStrategy, Spectrum spectrum)
{
List <List <List <Complex> > > transform = TransformImage(image, transformStrategy);
SwapQuadrants(transform);
ShowSpectrum(image, transform, spectrum);
}
public unsafe static void ShowFilterEffect(WriteableBitmap image, TransformStrategy transformStrategy, Filter filter)
{
List <List <List <Complex> > > transform = TransformImage(image, transformStrategy);
SwapQuadrants(transform);
transform.ForEach(x => filter.ApplyFilter(x));
SwapQuadrants(transform);
ReverseTransform(transform, transformStrategy);
SwapImage(image, transform);
}
private unsafe static List <List <List <Complex> > > TransformImage(WriteableBitmap image, TransformStrategy transformStrategy)
{
image.Lock();
byte *imagePointer = (byte *)image.BackBuffer;
int stride = image.BackBufferStride;
List <List <List <Complex> > > transformedImage = new List <List <List <Complex> > >();
for (int c = 0; c < ImageConstants.numberOfColors; c++)
{
List <List <Complex> > colorPlane = new List <List <Complex> >();
for (int i = 0; i < image.PixelHeight; i++)
{
List <Complex> row = new List <Complex>();
for (int j = 0; j < image.PixelWidth; j++)
{
int index = i * stride + j * ImageConstants.bytesPerPixel + c;
row.Add(new Complex(imagePointer[index], 0));
}
colorPlane.Add(transformStrategy.TransformSignal(row));
}
transformedImage.Add(colorPlane);
}
for (int c = 0; c < ImageConstants.numberOfColors; c++)
{
List <List <Complex> > colorPlane = transformedImage[c];
for (int i = 0; i < image.PixelWidth; i++)
{
List <Complex> column = Enumerable.Range(0, colorPlane.Count).Select(x => colorPlane[x][i]).ToList();
List <Complex> transformedColumn = transformStrategy.TransformSignal(column);
for (int j = 0; j < colorPlane.Count; j++)
{
colorPlane[j][i] = transformedColumn[j];
}
}
}
image.Unlock();
return(transformedImage);
}
private unsafe static void ReverseTransform(List <List <List <Complex> > > transform, TransformStrategy transformStrategy)
{
for (int c = 0; c < ImageConstants.numberOfColors; c++)
{
List <List <Complex> > colorPlane = transform[c];
for (int i = 0; i < colorPlane.Count; i++)
{
colorPlane[i] = transformStrategy.ReverseSignalTransform(colorPlane[i]);
}
for (int i = 0; i < colorPlane[0].Count; i++)
{
List <Complex> column = Enumerable.Range(0, colorPlane.Count).Select(x => colorPlane[x][i]).ToList();
List <Complex> transformedColumn = transformStrategy.ReverseSignalTransform(column);
for (int j = 0; j < colorPlane.Count; j++)
{
colorPlane[j][i] = transformedColumn[j];
}
}
}
}
