private bool isBlackWhite(Color[,] image, CIELAB[,] imageLAB)
{
double nonGray = 0;
double thresh = 0.001;
CIELAB white = new CIELAB(100, 0, 0);
CIELAB black = new CIELAB(0, 0, 0);
int width = image.GetLength(0);
int height = image.GetLength(1);
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height; j++)
{
Color color = image[i, j];
CIELAB lab = imageLAB[i, j];//Util.RGBtoLAB(color);
bool gray = color.GetSaturation() <= 0.2 || lab.SqDist(white) <= 5 || lab.SqDist(black) <= 5;
if (!gray)
{
nonGray++;
}
}
}
return(nonGray / (width * height) < thresh);
}
