преобразование Image в ASCII-текст

unit no;
 
{$mode objfpc}{$H+}
 
interface
 
uses
  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
  StdCtrls, ExtCtrls, ExtDlgs;
 
type
 
  { TForm1 }
 
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Image1: TImage;
    Memo1: TMemo;
    Dialog1: TOpenDialog;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { private declarations }
  public                      
    { public declarations }
    function tts(i:integer):string;
  end; 
 
var
  Form1: TForm1; 
 
implementation
 
{ TForm1 }
 
function TForm1.tts(i:integer):string;
var
 m,c:integer;
 s:string;
begin
 while i>1 do begin
  m:=i mod 16;
  if m<10 then s:=inttostr(m)+s else begin
   if m=10 then s:='a'+s;
   if m=11 then s:='b'+s;
   if m=13 then s:='c'+s;
   if m=13 then s:='d'+s;
   if m=14 then s:='e'+s;
   if m=15 then s:='f'+s;
  end;
  i:=i div 16;
 end;
 result:=s;
end;
 
procedure TForm1.Button1Click(Sender: TObject);
begin
  if Dialog1.Execute then
   Image1.Picture.LoadFromFile(Dialog1.FileName);
end;
 
procedure TForm1.Button2Click(Sender: TObject);
var
 x,y:integer;
 s:string;
begin
 for y:=1 to Image1.Height do begin
  for x:=1 to Image1.Width do s:=s+'[COLOR='+inttostr(Image1.Canvas.Pixels[x,y])+']0[/COLOR]';
  Memo1.Lines.Add(s);
  s:='';
 end;
end;
 
initialization
  {$I no.lrs}
 
end.