Du kannst folgendes machen:
Delphi-Quellcode:
procedure TForm1.FormCreate(Sender: TObject);
var orginal: TPicture;
begin
orginal := TPicture.Create;
orginal.Assign(Image1.Picture);
end;
Immer, wenn sich die Koordinate ändert:
Delphi-Quellcode:
Image1.Picture.Assign(orginal);
Image1.Canvas.Pixels[x, y] := clRed;