public static async void PercentBlackSelectionBinarisation(this Brush brush, int percent)
{
Bh.Initialize(brush);
var histogram = new Histogram((ImageBrush)brush);
var lut = BinarisationHelper.GetBlackPercentLut(percent, Bh.Width * Bh.Height, histogram.HistogramAv);
for (var i = 0; i < Bh.Length; i += 4)
{
var r = Bh.Pixels[i + 2];
var g = Bh.Pixels[i + 1];
var b = Bh.Pixels[i];
Bh.Pixels[i + 2] = (byte)lut[r];
Bh.Pixels[i + 1] = (byte)lut[g];
Bh.Pixels[i] = (byte)lut[b];
}
await Bh.UpdateBrush();
}
public static void PerformOtsu(this Brush brush)
{
int threshold = BinarisationHelper.GetOtsuThreshold((ImageBrush)brush);
MakeManualBinarisation(brush, threshold);
}