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if Deinbild.Canvas.Pixels[x,y]<>clwhite then 
variable:=variable+1;					

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var bmp:tbitmap;
...
bmp:=tbitmap.Create;
bmp.Width:=image1.Width;
bmp.Height:=image1.Height;
bmp.Assign(image1.Picture.Graphic);
if bmp.Canvas.Pixels[x,y]<>clwhite then
variable:=variable+1;					

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procedure TForm1.KreisClick(Sender: TObject);
var 
  bmp:tbitmap;
  x,y:integer; 
begin
  bmp:=tbitmap.Create; 
  bmp.Width:=image1.Width; 
  bmp.Height:=image1.Height; 
  bmp.Assign(image1.Picture.Graphic); 
  if bmp.Canvas.Pixels[x,y]<>clwhite then
    begin
      exit;
    end
  else
    x:=x+1;

  label1.caption:=inttostr(x);
end;					

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procedure TForm1.SGEinkaufslisteMouseDown(Sender: TObject;
  Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
begin
if Kreis.Canvas.Pixels[x,y]<>clwhite then x:=x+1; 
label1.caption:=inttostr(x); 
end;