Funktion zum Vergleich zweier Bilder, falsche Ergebnisse...

[burning]

24 bit image ->

Code:

procedure CompareImages(Image1, Image2: TImage);
var
  b1, b2: TBitmap;
  c1, c2: PByte;
  x, y, i,
  different: Integer; // Counter for different pixels
begin
  b1 := Image1.Picture.Bitmap;
  b2 := Image2.Picture.Bitmap;
  Assert(b1.PixelFormat = b2.PixelFormat); // they have to be equal
  different := 0;
  for y := 0 to b1.Height - 1 do
  begin
    c1 := b1.Scanline[y];
    c2 := b2.Scanline[y];
    for x := 0 to b1.Width - 1 do
      for i := 0 to 3 - 1 do // 1, to 4, dep. on pixelformat
      begin
        Inc(different, Integer(c1^ <> c2^));
        Inc(c1);
        Inc(c2);
      end;
  end;
      form1.label1.caption:='Unterschiede:';
    form1.label2.caption:='Unterschiede:'+IntToStr(different);
end;

-> 3 fach zu hohes ergebnis, wenn man die anzahl der unterschiedlichen pixel haben will!