c# 中图像的简单二值化处理

          图像二值化，是很多图像处理中都会用到的基础操作之一,在c#我们可以使用GDI+对图像进行二值化的处理：

                   

public void Binarization(string filePath,string newFilePath)
        {
            Bitmap btmp = new Bitmap(filePath);

            BitmapData btmpd = btmp.LockBits(new Rectangle(0, 0, btmp.Width, btmp.Height), ImageLockMode.ReadWrite, btmp.PixelFormat);

            //32位深度为4,24位为3
            int PixelSize = 3;
            unsafe
            {
                for (int i = 0; i < btmp.Height; i++)
                {
                    for (int j = 0; j < btmp.Width; j++)
                    {
                        byte* row = (byte*)btmpd.Scan0 + PixelSize * j + (i * btmpd.Stride);
                        if (row[0] + row[1] + row[2] > 382)
                        {
                            row[0] = row[1] = row[2] = 255;
                            continue;
                        }
                        row[0] = row[1] = row[2] = 0;
                    }
                }
            }
            btmp.Save(newFilePath);
        }