if nargout [varargout{1:nargout}] = gui_mainfcn(gui_state, varargin{:}); else gui_mainfcn(gui_state, varargin{:}); end

Transkripsi

1 77 Lampiran 1. Fungsi Menu Utama function varargout = menu_utm(varargin) gui_singleton = 1; gui_state = struct('gui_name', mfilename,... 'gui_singleton', gui_singleton,... 'gui_layoutfcn', [],... 'gui_callback', []); if nargin && ischar(varargin{1}) gui_state.gui_callback = str2func(varargin{1}); if nargout [varargout{1:nargout}] = gui_mainfcn(gui_state, varargin{:}); else gui_mainfcn(gui_state, varargin{:}); function menu_utm_openingfcn(hobject, eventdata, handles, varargin) handles.output = hobject; movegui(gcf, 'center'); guidata(hobject, ; function varargout = menu_utm_outputfcn(hobject, varargout{1} = handles.output; function btnprosespenyisipan_callback(hobject, figure(prosespenyisipan); function btnprosesekstraksi_callback(hobject, figure(prosesekstraksi); function btnhitungmse_callback(hobject, eventdata,

2 78 figure (hitungmse); function btnhitungmse_createfcn(hobject, eventdata, function btnkeluar_callback(hobject, eventdata, close all;

3 79 Lampiran 2. Fungsi Enkripsi dan Encoding function varargout = prosespenyisipan(varargin) gui_singleton = 1; gui_state = struct('gui_name', mfilename,... 'gui_singleton', gui_singleton,... 'gui_layoutfcn', [],... 'gui_callback', []); if nargin && ischar(varargin{1}) gui_state.gui_callback = str2func(varargin{1}); if nargout [varargout{1:nargout}] = gui_mainfcn(gui_state, varargin{:}); else gui_mainfcn(gui_state, varargin{:}); function prosespenyisipan_openingfcn(hobject, eventdata, handles, varargin) handles.output = hobject; guidata(hobject, ; btnclear_callback( function varargout = prosespenyisipan_outputfcn(hobject, varargout{1} = handles.output; function btnclear_callback( axes(handles.piccitracover); set(gca,'xtick',[],'ytick',[]); axes(handles.piccitrastego); set(gca,'xtick',[],'ytick',[]); set(handles.txtpesanrahasia,'string',''); set(handles.txtkatakuncipertama,'string','');

4 80 set(handles.txtkatakuncikedua,'string',''); set(handles.txtkatakunciketiga,'string',''); set(handles.lblnamafile,'string',''); clearvars -global; function btnpilihcitracover_callback(hobject, [filegambar, foldergambar] = uigetfile('*.pgm;*.png;*.tif;*.bmp','pilih Citra Cover'); if isequal(filegambar,0) ; axes(handles.piccitrastego); set(gca,'xtick',[],'ytick',[]); global gmbinput namafile pathgambar = [foldergambar filegambar]; axes(handles.piccitracover) imshow(pathgambar); drawnow; tmpimg = imread(pathgambar); gmbinput = tmpimg; set(handles.lblnamafile,'string',filegambar(1:length(fi legambar)-4)); namafile = filegambar; function txtpesanrahasia_callback(hobject, eventdata, function txtpesanrahasia_createfcn(hobject, eventdata,

5 81 function txtkatakuncipertama_callback(hobject, function txtkatakuncipertama_createfcn(hobject, function txtkatakuncikedua_callback(hobject, eventdata, function txtkatakuncikedua_createfcn(hobject, function txtkatakunciketiga_callback(hobject, function txtkatakunciketiga_createfcn(hobject, function btnprosespenyisipan_callback(hobject, global gmbinput gmboutput if (isempty(gmbinput)) message = sprintf('pilih citra cover terlebih dahulu!'); if (isempty(get(handles.txtpesanrahasia,'string'))) message = sprintf('masukkan pesan rahasia!');

6 82 if (isempty(get(handles.txtkatakuncipertama,'string'))) message = sprintf('masukkan kata kunci pertama!'); if (isempty(get(handles.txtkatakuncikedua,'string'))) message = sprintf('masukkan kata kunci kedua!'); if (isempty(get(handles.txtkatakunciketiga,'string'))) message = sprintf('masukkan kata kunci ketiga!'); filtergmbinput = gmbinput; filtergmbinput(filtergmbinput == bin2dec(' ')) = bin2dec(' '); filtergmbinput(filtergmbinput == bin2dec(' ')) = bin2dec(' '); filtergmbinput(filtergmbinput == bin2dec(' ')) = bin2dec(' '); filtergmbinput(filtergmbinput == bin2dec(' ')) = bin2dec(' '); [gmboutput] = MLSB(true, filtergmbinput, get(handles.txtpesanrahasia,'string'),... get(handles.txtkatakuncipertama,'string'),... get(handles.txtkatakuncikedua,'string'),... get(handles.txtkatakunciketiga,'string')); if ~isempty(gmboutput) axes(handles.piccitrastego) imshow(gmboutput); drawnow; message = sprintf('proses Penyisipan Berhasil'); function btnsimpancitrastego_callback(hobject,

7 83 global namafile gmboutput if (isempty(gmboutput)) message = sprintf('lakukan proses penyisipan terlebih dahulu!'); nama = namafile(1:strfind(namafile, '.')-1); ekstensi = namafile(strfind(namafile, '.'):); [filegambar, foldergambar] = uiputfile([nama '_Stego' ekstensi],'save file name'); if ~isequal(filegambar, 0) pathgambar = [foldergambar filegambar]; imwrite(gmboutput, pathgambar);

8 84 Lampiran 3. Fungsi Decoding dan Dekripsi function varargout = prosesekstraksi(varargin) gui_singleton = 1; gui_state = struct('gui_name', mfilename,... 'gui_singleton', gui_singleton,... 'gui_layoutfcn', [],... 'gui_callback', []); if nargin && ischar(varargin{1}) gui_state.gui_callback = str2func(varargin{1}); if nargout [varargout{1:nargout}] = gui_mainfcn(gui_state, varargin{:}); else gui_mainfcn(gui_state, varargin{:}); function prosesekstraksi_openingfcn(hobject, eventdata, handles, varargin) handles.output = hobject; guidata(hobject, ; btnclear_callback( function varargout = prosesekstraksi_outputfcn(hobject, varargout{1} = handles.output; function btnclear_callback( axes(handles.piccitrastego); set(gca,'xtick',[],'ytick',[]); set(handles.txtkatakuncipertama,'string',''); set(handles.txtkatakuncikedua,'string',''); set(handles.txtkatakunciketiga,'string',''); set(handles.lblnamafile,'string',''); set(handles.txtpesanrahasia,'string','');

9 85 clearvars -global; function btncitrastego_callback(hobject, eventdata, [filegambar, foldergambar] = uigetfile('*.pgm;*.png;*.tif;*.bmp','pilih Citra Stego'); if isequal(filegambar,0) ; set(handles.txtpesanrahasia,'string',''); global gmbinput namafile pathgambar = [foldergambar filegambar]; axes(handles.piccitrastego) imshow(pathgambar); drawnow; tmpimg = imread(pathgambar); gmbinput = tmpimg; set(handles.lblnamafile,'string',filegambar(1:length(fi legambar)-4)); namafile = filegambar; function txtkatakuncipertama_callback(hobject, function txtkatakuncipertama_createfcn(hobject, function txtkatakuncikedua_callback(hobject, eventdata, function txtkatakuncikedua_createfcn(hobject,

10 86 function txtkatakunciketiga_callback(hobject, function txtkatakunciketiga_createfcn(hobject, function txtpesanrahasia_callback(hobject, eventdata, function txtpesanrahasia_createfcn(hobject, eventdata, function btnprosesekstraksi_callback(hobject, global gmbinput if (isempty(gmbinput)) message = sprintf('pilih citra stego terlebih dahulu!'); if (isempty(get(handles.txtkatakuncipertama,'string'))) message = sprintf('masukkan kata kunci pertama!'); if (isempty(get(handles.txtkatakuncikedua,'string'))) message = sprintf('masukkan kata kunci kedua!'); if (isempty(get(handles.txtkatakunciketiga,'string')))

11 87 message = sprintf('masukkan kata kunci ketiga!'); [pesan] = MLSB(false, gmbinput, '',... get(handles.txtkatakuncipertama,'string'),... get(handles.txtkatakuncikedua,'string'),... get(handles.txtkatakunciketiga,'string')); if ~isempty(pesan) %Tampilkan pada layar set(handles.txtpesanrahasia,'string',pesan); message = sprintf('proses Ekstraksi Berhasil');

12 88 Lampiran 4. Fungsi Means Square Error (MSE) function varargout = hitungmse(varargin) gui_singleton = 1; gui_state = struct('gui_name', mfilename,... 'gui_singleton', gui_singleton,... 'gui_layoutfcn', [],... 'gui_callback', []); if nargin && ischar(varargin{1}) gui_state.gui_callback = str2func(varargin{1}); if nargout [varargout{1:nargout}] = gui_mainfcn(gui_state, varargin{:}); else gui_mainfcn(gui_state, varargin{:}); function hitungmse_openingfcn(hobject, eventdata, handles, varargin) guidata(hobject, ; btnclear_callback( function varargout = hitungmse_outputfcn(hobject, varargout{1} = handles.output; function btnclear_callback( axes(handles.piccitracover); set(gca,'xtick',[],'ytick',[]); axes(handles.piccitrastego); set(gca,'xtick',[],'ytick',[]); set(handles.lblnamafilecitracover,'string',''); set(handles.lblnamafilecitrastego,'string',''); set(handles.lblmse,'string',''); clearvars -global;

13 89 function btnpilihcitracover_callback(hobject, [filegambar, foldergambar] = uigetfile('*.jpg;*.pgm;*.png;*.tif;*.bmp','pilih Citra Cover'); if isequal(filegambar,0) ; global gmbinput pathgambar = [foldergambar filegambar]; axes(handles.piccitracover) imshow(pathgambar); drawnow; tmpimg = imread(pathgambar); gmbinput = tmpimg; set(handles.lblnamafilecitracover,'string',filegambar(1 :length(filegambar)-4)); function btnpilihcitrastego_callback(hobject, [filegambar, foldergambar] = uigetfile('*.jpg;*.pgm;*.png;*.tif;*.bmp','pilih Citra Cover'); if isequal(filegambar,0) ; global gmboutput pathgambar = [foldergambar filegambar]; axes(handles.piccitrastego) imshow(pathgambar); drawnow; tmpimg = imread(pathgambar); gmboutput = tmpimg; %Tampilkan nama file

14 90 set(handles.lblnamafilecitrastego,'string',filegambar(1 :length(filegambar)-4)); function btnhitungmse_callback(hobject, eventdata, global gmbinput gmboutput if (isempty(gmbinput)) message = sprintf('pilih citra cover terlebih dahulu!'); if (isempty(gmboutput)) message = sprintf('pilih citra stego terlebih dahulu!'); if length(size(gmbinput)) ~= length(size(gmboutput)) message = sprintf('ukuran citra tidak sama!'); for i = 1 : length(size(gmbinput)) if size(gmbinput, i) ~= size(gmboutput, i) message = sprintf('ukuran citra tidak sama!'); for i = 1 : length(size(gmbinput)) tmpmse = norm(double(gmbinput(:,:,i) - gmboutput(:,:,i))); mse = mse + (tmpmse / (size(gmbinput, 1) * size(gmbinput, 2))); set(handles.lblmse,'string',['mse = ' num2str(mse)]);