黑白二值化

/// <summary>/// 去杂色，转换为黑白图片/// </summary>/// <param name="img"></param>public static void Binarization(Bitmap img, int thresholdValue){for (int x = 0; x < img.Width; x++){for (int y = 0; y < img.Height; y++){Color c = img.GetPixel(x, y);if (c.R >= thresholdValue)img.SetPixel(x, y, Color.FromArgb(255, 255, 255));elseimg.SetPixel(x, y, Color.FromArgb(0, 0, 0));}}}