/// <summary>
/// Create complex image from grayscale bitmap.
/// </summary>
///
/// <param name="imageData">Source image data (8 bpp indexed).</param>
///
/// <returns>Returns an instance of complex image.</returns>
///
/// <exception cref="UnsupportedImageFormatException">The source image has incorrect pixel format.</exception>
/// <exception cref="InvalidImagePropertiesException">Image width and height should be power of 2.</exception>
///
public static ComplexImage FromBitmap(BitmapData imageData)
{
// check image format
if (imageData.PixelFormat != PixelFormat.Format8bppIndexed)
{
throw new Exception("Source image can be graysclae (8bpp indexed) image only.");
}
// get source image size
int width = imageData.Width;
int height = imageData.Height;
int offset = imageData.Stride - width;
// check image size
if ((!Tools.IsPowerOf2(width)) || (!Tools.IsPowerOf2(height)))
{
throw new Exception("Image width and height should be power of 2.");
}
// create new complex image
ComplexImage complexImage = new ComplexImage(width, height);
Complex[,] data = complexImage.data;
// do the job
unsafe
{
byte *src = (byte *)imageData.Scan0.ToPointer();
// for each line
for (int y = 0; y < height; y++)
{
// for each pixel
for (int x = 0; x < width; x++, src++)
{
data[y, x].Re = (float)*src / 255;
}
src += offset;
}
}
return(complexImage);
}
/// <summary>
/// Clone the complex image.
/// </summary>
///
/// <returns>Returns copy of the complex image.</returns>
///
public object Clone()
{
// create new complex image
ComplexImage dstImage = new ComplexImage(width, height);
Complex[,] data = dstImage.data;
for (int i = 0; i < height; i++)
{
for (int j = 0; j < width; j++)
{
data[i, j] = this.data[i, j];
}
}
// clone mode as well
dstImage.fourierTransformed = fourierTransformed;
return(dstImage);
}
static void Main(string[] args)
{
bool Sequence = true;
if (args.Length > 1 && !Sequence)
{
Console.WriteLine(DateTime.Now.TimeOfDay);
foreach (var picture in args)
{
var processInfo = new ProcessStartInfo
{
UseShellExecute = false, // change value to false
FileName = "FFTc.exe",
Arguments = picture
};
Console.WriteLine("Starting process for " + "\\img\\" + picture + ".bmp");
Process.Start(processInfo);
}
}
else if (Sequence)
{
Stopwatch stopwatch = Stopwatch.StartNew();
foreach (var picture in args)
{
Bitmap image = Image.FromFile(System.IO.Directory.GetCurrentDirectory() + "\\img\\" + picture + ".bmp");
ComplexImage complexImage = ComplexImage.FromBitmap(image);
complexImage.ForwardFourierTransform();
Bitmap fourierImage = complexImage.ToBitmap();
// Console.WriteLine(System.IO.Directory.GetCurrentDirectory() + "\\img\\"+ args[0] + "fourier.bmp");
fourierImage.Save(System.IO.Directory.GetCurrentDirectory() + "\\img\\" + picture + "fourier.bmp");
// ComplexImage backward = ComplexImage.FromBitmap(fourierImage);
complexImage.BackwardFourierTransform();
Bitmap backwardFourier = complexImage.ToBitmap();
backwardFourier.Save(System.IO.Directory.GetCurrentDirectory() + "\\img\\" + picture + "backwardFourier.bmp");
}
stopwatch.Stop();
Console.WriteLine("Sekwencyjne wykonywanie programu trwało: " + stopwatch.ElapsedMilliseconds + " milisekund.\n ");
}
else if (args.Length == 1)
{
Bitmap image = Image.FromFile(System.IO.Directory.GetCurrentDirectory() + "\\img\\" + args[0] + ".bmp");
ComplexImage complexImage = ComplexImage.FromBitmap(image);
// Stopwatch stopwatch = Stopwatch.StartNew();
complexImage.ForwardFourierTransform(8);
// stopwatch.Stop();
// Console.WriteLine(stopwatch.ElapsedMilliseconds);
Bitmap fourierImage = complexImage.ToBitmap();
// Console.WriteLine(System.IO.Directory.GetCurrentDirectory() + "\\img\\"+ args[0] + "fourier.bmp");
fourierImage.Save(System.IO.Directory.GetCurrentDirectory() + "\\img\\" + args[0] + "fourier.bmp");
// Stopwatch stopwatch2 = Stopwatch.StartNew();
// ComplexImage backward = ComplexImage.FromBitmap(fourierImage);
complexImage.BackwardFourierTransform(8);
// stopwatch2.Stop();
// Console.WriteLine(stopwatch2.ElapsedMilliseconds);
Bitmap backwardFourier = complexImage.ToBitmap();
backwardFourier.Save(System.IO.Directory.GetCurrentDirectory() + "\\img\\" + args[0] + "backwardFourier.bmp");
Console.WriteLine("Proces dla obrazka " + args[0] + " zakończył się o: " + DateTime.Now.TimeOfDay);
}
Console.ReadLine();
}