public Bitmap ProcessPicture(ImageLoader loader)
{
var src = (Bitmap)loader.Image;
int width = src.Width;
int height = src.Height;
var dest = new Bitmap(width, height, src.PixelFormat);
System.Random rng = SystemRandomSource.Default;
using (var srcBMP = new ConcurrentBitmap(src))
{
using (var newBMP = new ConcurrentBitmap(dest))
{
// For each line
Parallel.For(
0,
height,
y =>
{
// For each pixel
for (var x = 0; x < width; x++)
{
double sample = rng.NextDouble();
Color currentColor = srcBMP.GetPixel(x, y);
var I = (int)(currentColor.R * 0.299
+ currentColor.G * 0.587
+ currentColor.B * 0.114);
int res = I;
if (sample < pA)
{
// PA
res = byte.MinValue;
}
else if (sample < pA + pB)
{
// PB
res = byte.MaxValue;
}
Color output = Color.FromArgb(res, res, res);
newBMP.SetPixel(x, y, output);
}
}
);
}
}
//src.Dispose();
return(dest);
}
public Bitmap ProcessPicture(ImageLoader loader)
{
var image = (Bitmap)loader.Image;
int width = image.Width;
int height = image.Height;
var dest = new Bitmap(width, height, image.PixelFormat);
using (var srcBMP = new ConcurrentBitmap(image))
{
using (var destBMP = new ConcurrentBitmap(dest))
{
int maskLength = radius * 2 + 1;
int maskSize = maskLength * maskLength;
// For each line
Parallel.For(
0,
height,
y =>
{
for (var x = 0; x < width; x++)
{
// The number of mask elements taken into account
int processedSize;
double blue;
double divider;
double green;
double red = green = blue = divider = processedSize = 0;
var pixels = new List <Color>();
// For each kernel row
for (var i = 0; i < maskLength; i++)
{
int ir = i - radius;
int offsetY = y + ir;
// Skip the current row
if (offsetY < 0)
{
continue;
}
if (offsetY >= height)
{
break;
}
// For each kernel column
for (var j = 0; j < maskLength; j++)
{
int jr = j - radius;
int offsetX = x + jr;
// Skip the column
if (offsetX < 0 || offsetX >= width)
{
continue;
}
// ReSharper disable once AccessToDisposedClosure
Color sourceColor = srcBMP.GetPixel(offsetX, offsetY);
pixels.Add(sourceColor);
processedSize++;
}
}
pixels.Sort(CompareColors);
// Check and apply the divider
if ((long)divider != 0)
{
red /= divider;
green /= divider;
blue /= divider;
}
int index = (int)(Math.Floor(Math.Pow(2 * radius + 1, 2) / 2) + 1);
Color destinationColor = pixels[pixels.Count / 2];
// ReSharper disable once AccessToDisposedClosure
destBMP.SetPixel(x, y, destinationColor);
}
}
);
}
}
return(dest);
}