public GrayscaleImageAdapter(BitmapSource rgbSource)
{
if (rgbSource == null)
{
throw new ArgumentNullException("source");
}
int width = rgbSource.PixelWidth;
int height = rgbSource.PixelHeight;
GrayscalePixel[,] result = new GrayscalePixel[height, width];
byte[] byteArray = new byte[height * width * 4];
byte[] grayscaleArray = new byte[height * width];
int stride = width * 4;
rgbSource.CopyPixels(byteArray, stride, 0);
int k = 0;
for (int i = 0; i < height; i++)
{
for (int j = 0; j < width; j++)
{
byte blue = byteArray[(i * width + j) * 4 + 0];
byte green = byteArray[(i * width + j) * 4 + 1];
byte red = byteArray[(i * width + j) * 4 + 2];
GrayscalePixel grayscalePixel = new GrayscalePixel(Convert.ToByte(0.2125 * red + 0.7154 * green + 0.0721 * blue));
result[i, j] = grayscalePixel;
grayscaleArray[k++] = grayscalePixel.Level;
}
}
this.image = new GrayscaleImage(result);
this.source = BitmapSource.Create(image.Width, image.Height, 96, 96, PixelFormats.Gray8, null, grayscaleArray, image.Width);
}
public GrayscaleImage(GrayscalePixel[,] pixels)
{
if (pixels == null)
{
throw new ArgumentNullException("pixels");
}
this.pixels = new IPixel[pixels.GetLength(0), pixels.GetLength(1)];
Array.Copy(pixels, this.pixels, pixels.GetLength(0) * pixels.GetLength(1));
}
public override IImage ApplyEqualizedHistogram(IHistogram histogram)
{
List<int> equalizedValues = new List<int>(histogram.EqualizedValues);
GrayscalePixel[,] pixels = new GrayscalePixel[this.Height, this.Width];
for (int row = 0; row < histogram.Image.Height; row++)
{
for (int column = 0; column < histogram.Image.Width; column++)
{
int level = ((GrayscalePixel)this.pixels[row, column]).Level;
pixels[row, column] = new GrayscalePixel((byte)equalizedValues[level]);
}
}
return new GrayscaleImage(pixels);
}
public static GrayscaleImage ToGrayscaleImage(this RgbImage rgbImage)
{
if (rgbImage == null)
{
throw new ArgumentNullException("rgbImage", "RgbImage constructor can't be invoked with null");
}
GrayscalePixel[,] grayscalePixels = new GrayscalePixel[rgbImage.Height, rgbImage.Width];
for (int i = 0; i < rgbImage.Height; i++)
{
for (int j = 0; j < rgbImage.Width; j++)
{
RgbPixel rgbPixel = (RgbPixel)rgbImage.Pixels[i, j];
grayscalePixels[i, j] = rgbPixel.ToGrayscalePixel();
}
}
return new GrayscaleImage(grayscalePixels);
}
