public static double EvaluateLocallyWAbs(UnmanagedImage image)
{
byte[,] pixels = image.GetPixels();
int width = pixels.GetLength(0);
int height = pixels.GetLength(1);
double aggregate = 0;
for (int i = 0; i < width - 1; i++)
{
for (int j = 0; j < height; j++)
{
aggregate += Math.Abs((pixels[i, j] - pixels[i + 1, j]));
}
}
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height - 1; j++)
{
aggregate += Math.Abs((pixels[i, j] - pixels[i, j + 1]));
}
}
for (int i = 0; i < width - 1; i++)
{
for (int j = 0; j < height - 1; j++)
{
aggregate += Math.Abs((pixels[i, j] - pixels[i + 1, j + 1]));
}
}
for (int i = 0; i < width - 1; i++)
{
for (int j = 1; j < height; j++)
{
aggregate += Math.Abs((pixels[i, j] - pixels[i + 1, j - 1]));
}
}
return (1D / (width * height * Math.Pow(255, 2))) * aggregate;
}
public static double EvaluateM(UnmanagedImage image)
{
byte[,] pixels = image.GetPixels();
var stats = new ImageStatistics(image);
var minGrayLevel = (byte)stats.Gray.Min;
var maxGrayLevel = (byte)stats.Gray.Max;
return (double)(maxGrayLevel - minGrayLevel) / (double)(maxGrayLevel + minGrayLevel);
}
public static double EvaluateWAbs(UnmanagedImage image)
{
byte[,] pixels = image.GetPixels();
double aggregate = 0;
int width = pixels.GetLength(0);
int height = pixels.GetLength(1);
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height; j++)
{
aggregate += pixels[i, j];
}
}
aggregate = Math.Pow(width * height, -1) * aggregate;
double aggregate2 = 0;
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height; j++)
{
aggregate2 += Math.Abs((pixels[i, j] - aggregate));
}
}
return (4D / (width * height * Math.Pow(255, 2))) * aggregate2;
}
public static double EvaluateS(UnmanagedImage image)
{
byte[,] pixels = image.GetPixels();
var stats = new ImageStatistics(image);
var minGrayLevel = (byte)stats.Gray.Min;
var maxGrayLevel = (byte)stats.Gray.Max;
double aggregate = 0;
int width = pixels.GetLength(0);
int height = pixels.GetLength(1);
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height; j++)
{
aggregate += pixels[i, j];
}
}
aggregate = Math.Pow(width * height, -1) * aggregate;
return (maxGrayLevel - minGrayLevel) / aggregate;
}
