private List <PixelYRGB> GeneratePCRDataForColorImage(Bitmap bmp)
{
List <PixelYRGB> imageData = new List <PixelYRGB>();
CImage colorCImg = new CImage(bmp);
Bitmap greyBMP = Coloring.ConvertToGrayscale(bmp);
//greyBMP.Save(@"C:\Temp\SamplesImages\color\v3\ColoredConvertedToGrey.jpg");
CImage greyCImg = new CImage(greyBMP);
greyBMP.Dispose();
// Populate LumGrid
double[][] lumGrid = new double[colorCImg.Height][];
for (int y = 0; y < bmp.Height; y++)
{
lumGrid[y] = new double[colorCImg.Width];
for (int x = 0; x < bmp.Width; x++)
{
int i = (x + (bmp.Width * y));
lumGrid[y][x] = Utilities.CalcLuminance(
greyCImg.Grid[3 * i + 2], // R
greyCImg.Grid[3 * i + 1], // G
greyCImg.Grid[3 * i + 0] // B
);
}
}
// Populate imageData
for (int y2 = 0; y2 < bmp.Height; y2++)
{
for (int x2 = 0; x2 < bmp.Width; x2++)
{
// get neighbours
double[] neighbours = Utilities.GetCardinalNeighbours(ref lumGrid, x2, y2);
double mean = Utilities.GetMeanOfNeighbours(neighbours);
int i2 = (x2 + (bmp.Width * y2));
var pcr = new PixelYRGB()
{
Y = lumGrid[y2][x2],
NeighbourMeanLuminance = mean,
NeighbourLuminanceStandardDeviation = Utilities.GetStandardDeviationofNeighbours(neighbours, mean, false),
};
pcr.R = colorCImg.Grid[3 * i2 + 2]; // R
pcr.G = colorCImg.Grid[3 * i2 + 1]; // G
pcr.B = colorCImg.Grid[3 * i2 + 0]; // B
imageData.Add(pcr);
}
}
return(imageData);
}
public void Shuffle(ref List <PixelYRGB> list)
{
Random rng = new Random();
int n = list.Count;
while (n > 1)
{
n--;
int k = rng.Next(n + 1);
PixelYRGB value = list[k];
list[k] = list[n];
list[n] = value;
}
}