/// <summary>
/// Binarizes the specified bitmap
/// </summary>
/// <param name="bitmap">Bitmap</param>
/// <returns></returns>
public static Bitmap Binarize(Bitmap bitmap)
{
Bitmap resultImage = bitmap;
GdPictureImaging image = new GdPictureImaging();
int imageId = image.CreateGdPictureImageFromBitmap(bitmap);
if (imageId > 0)
{
image.FxBlackNWhite(imageId, BitonalReduction.Stucki);
image.ConvertTo1BppFast(imageId);
resultImage = image.GetBitmapFromGdPictureImage(imageId).CloneSmart(image.GetPixelFormat(imageId));
image.ReleaseGdPictureImage(imageId);
}
return(resultImage);
}