C#怎么去掉扫描后的图片的空白部分，再网上找了好久，多没找到。望各位帮忙，谢谢

Question

C#怎么去掉扫描后的图片的空白部分，再网上找了好久，多没找到。望各位帮忙，谢谢

Answer 1

 private void button2_Click(object sender, EventArgs e)
        {
            //创建图像 
            Bitmap image = new Bitmap("c:\\1.JPG");
            //获取图像的BitmapData对像 
            BitmapData data = image.LockBits(new Rectangle(0, 0, image.Width, image.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
            //循环处理 
            int k = 0;
            int h = 0;
            int w = 0;
            unsafe
            {
                byte* ptr = (byte*)(data.Scan0.ToPointer ());
                for (int i = 0; i < data.Height; i++)
                {
                    h = h + 1;
                    for (int j = 0; j < data.Width; j++)
                    {
                        w = w + 1;
                      int a  =Convert .ToInt32 ( ptr[0].ToString ());
                     int b =Convert .ToInt32 ( ptr[1].ToString());
                      int c =Convert .ToInt32 ( ptr[2].ToString());
                      if (a < 150 && b < 150 && c < 150)
                      {                      }
                      else
                      {
                         
                          if (k == 0)
                          {
                              this.textBox1.Text =a.ToString();
                              this.textBox2.Text = b.ToString();
                              this.textBox3.Text = c.ToString();
                              this.textBox4.Text = h.ToString();
                              this.textBox5.Text = w.ToString();
                              k = k + 1;
                          }
                      
                      }
                        ptr += 3;
                    }
                    ptr += data.Stride - data.Width * 3;
                }
            } 哪里错了。？？怎么取出的值不对。