[Ferra]

Код:

 procedure TForm1.Button1Click(Sender: TObject);
 var
   temp: TBitMap;
 begin
   temp := TBitMap.Create;
   try
     temp.Assign(Image1.Picture.BitMap);
     flip_vertikal(Temp, Image1.Picture.Bitmap);
   finally
     Temp.Free;
   end;
 end;