public override void Binarize(int level)
{
ResetToDefault();
PointTransformation.ConvertToGray(_bitmap, GrayConversionMode.Colorimetric);
_histogram.GenerateHistograms();
int Tk = 100;
while (true)
{
int leftSum = 0;
int leftBottomSum = 0;
int rightSum = 0;
int rightBottomSum = 0;
for (int j = 0; j <= Tk; j++)
{
leftSum += _histogram.RedHistogram[j] * j;
leftBottomSum += _histogram.RedHistogram[j];
}
for (int j = Tk + 1; j <= 255; j++)
{
rightSum += _histogram.RedHistogram[j] * j;
rightBottomSum += _histogram.RedHistogram[j];
}
if (rightBottomSum == 0)
{
rightBottomSum = 255;
}
if (leftBottomSum == 0)
{
leftBottomSum = 1;
}
if (leftSum / (2 * leftBottomSum) == rightSum / (2 * rightBottomSum))
{
break;
}
if (Tk == (leftSum / (2 * leftBottomSum)) + (rightSum / (2 * rightBottomSum)))
{
break;
}
Tk = (leftSum / (2 * leftBottomSum)) + (rightSum / (2 * rightBottomSum));
}
_levelBinarization.Binarize(Tk);
}
public override void Binarize(int level)
{
ResetToDefault();
int desiredPixels = Convert.ToInt32(_bitmap.Width * _bitmap.Height * ScaleLevelToPercentage(level));
PointTransformation.ConvertToGray(_bitmap, GrayConversionMode.Colorimetric);
_histogram.GenerateHistograms();
int sum = _bitmap.Width * _bitmap.Height;
for (int i = 255; i >= 0; i--)
{
sum -= _histogram.RedHistogram[i];
if (sum < desiredPixels)
{
level = i + 1;
break;
}
}
_levelBinarization.Binarize(level);
}
public override void Binarize(int level)
{
ResetToDefault();
PointTransformation.ConvertToGray(_bitmap, GrayConversionMode.Colorimetric);
_histogram.GenerateHistograms();
int pixels = _bitmap.Height * _bitmap.Width;
decimal Const = 255 / (decimal)pixels;
int[] cdf = new int[256];
Array.Copy(_histogram.RedHistogram, cdf, 255);
for (int r = 1; r <= 255; r++)
{
cdf[r] = cdf[r] + cdf[r - 1];
}
decimal Pob = 0.0M, Pb = 0.0M;
decimal Hob = 0.0M, Hb = 0.0M;
for (int i = 0; i <= level; i++)
{
Pob += cdf[i] * Const;
}
for (int i = 0; i <= level; i++)
{
Hob += (cdf[i] * Const) / Pob * Convert.ToDecimal(Math.Log(Convert.ToDouble((cdf[i] * Const) / Pob), 2));
}
for (int i = level + 1; i <= 255; i++)
{
Pb += cdf[i] * Const;
}
for (int i = level + 1; i <= 255; i++)
{
Hb += (cdf[i] * Const) / Pb * Convert.ToDecimal(Math.Log(Convert.ToDouble((cdf[i] * Const) / Pb), 2));
}
level = (int)(-1 * (Hob + Hb));
_levelBinarization.Binarize(level);
}
