C++Builder实现中值滤波与图像处理

void __fastcall TForm1::N10Click(TObject *Sender)
{                                                      //均值滤波
  int i,j,bmpheight,bmpwidth,red,green,blue;
  bmpheight=Image1->Height;
  bmpwidth=Image1->Width;
  for(i=0;i<bmpwidth;i++)
  for(j=0;j<bmpheight;j++)
  {
    int Pixel=this->Image1->Picture->Bitmap->Canvas->Pixels[i][j];
    rgb[i][j].r_color=GetRValue(Pixel);
    rgb[i][j].g_color=GetGValue(Pixel);
    rgb[i][j].b_color=GetBValue(Pixel);
   }
  for(i=1;i<=bmpwidth-2;i++)
  for(j=1;j<=bmpheight-2;j++)
  {
    red=rgb[i-1][j-1].r_color+rgb[i][j-1].r_color+rgb[i+1][j-1].r_color+
    rgb[i-1][j].r_color+rgb[i][j].r_color+rgb[i+1][j].r_color+rgb[i-1][j+1].r_color+
    rgb[i][j+1].r_color+rgb[i+1][j+1].r_color;
    green=rgb[i-1][j-1].g_color+rgb[i][j-1].g_color+rgb[i+1][j-1].g_color+
    rgb[i-1][j].g_color+rgb[i][j].g_color+rgb[i+1][j].g_color+rgb[i-1][j+1].g_color+
    rgb[i][j+1].g_color+rgb[i+1][j+1].g_color;
    blue=rgb[i-1][j-1].b_color+rgb[i][j-1].b_color+rgb[i+1][j-1].b_color+
    rgb[i-1][j].b_color+rgb[i][j].b_color+rgb[i+1][j].b_color+rgb[i-1][j+1].b_color+
    rgb[i][j+1].b_color+rgb[i+1][j+1].b_color;
    this->Image1->Picture->Bitmap->Canvas->Pixels[i][j]=RGB(red/9,green/9,blue/9);
   }