How do i link the first and second push button to the third one so that button don't have to pick the other 2 image again and just export the last image

function varargout = untitled1(varargin)

% UNTITLED1 MATLAB code for untitled1.fig

% UNTITLED1, by itself, creates a new UNTITLED1 or raises the existing

% singleton*.

%

% H = UNTITLED1 returns the handle to a new UNTITLED1 or the handle to

% the existing singleton*.

%

% UNTITLED1('CALLBACK',hObject,eventData,handles,...) calls the local

% function named CALLBACK in UNTITLED1.M with the given input arguments.

%

% UNTITLED1('Property','Value',...) creates a new UNTITLED1 or raises the

% existing singleton*. Starting from the left, property value pairs are

% applied to the GUI before untitled1_OpeningFcn gets called. An

% unrecognized property name or invalid value makes property application

% stop. All inputs are passed to untitled1_OpeningFcn via varargin.

%

% *See GUI Options on GUIDE's Tools menu. Choose "GUI allows only one

% instance to run (singleton)".

%

% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help untitled1

% Last Modified by GUIDE v2.5 11-Feb-2019 14:39:43

% Begin initialization code - DO NOT EDIT

gui_Singleton = 1;

gui_State = struct('gui_Name', mfilename, ...

'gui_Singleton', gui_Singleton, ...

'gui_OpeningFcn', @untitled1_OpeningFcn, ...

'gui_OutputFcn', @untitled1_OutputFcn, ...

'gui_LayoutFcn', [] , ...

'gui_Callback', []);

if nargin && ischar(varargin{1})

gui_State.gui_Callback = str2func(varargin{1});

end

if nargout

[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});

else

gui_mainfcn(gui_State, varargin{:});

end

% End initialization code - DO NOT EDIT

% --- Executes just before untitled1 is made visible.

function untitled1_OpeningFcn(hObject, eventdata, handles, varargin)

% This function has no output args, see OutputFcn.

% hObject handle to figure

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% varargin command line arguments to untitled1 (see VARARGIN)

% Choose default command line output for untitled1

handles.output = hObject;

% Update handles structure

guidata(hObject, handles);

% UIWAIT makes untitled1 wait for user response (see UIRESUME)

% uiwait(handles.figure1);

% --- Outputs from this function are returned to the command line.

function varargout = untitled1_OutputFcn(hObject, eventdata, handles)

% varargout cell array for returning output args (see VARARGOUT);

% hObject handle to figure

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure

varargout{1} = handles.output;

% --- Executes on button press in pushbutton1.

function pushbutton1_Callback(hObject, eventdata, handles)

% hObject handle to pushbutton1 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

[filename1,pathname1]=uigetfile('*.*','Chon anh goc');

oimg=imread(num2str(fullfile(pathname1,filename1)));

[a b]=size(oimg);

axes(handles.axes1);

imshow(oimg);

% --- Executes on button press in pushbutton2.

function pushbutton2_Callback(hObject, eventdata, handles)

% hObject handle to pushbutton2 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

[filename2,pathname2]=uigetfile('*.*','Chon thuy van');

WM=imread(num2str(fullfile(pathname2,filename2)));

if ndims(WM)

WM=rgb2gray(WM);

end

WM=imresize(WM,[512,512]);

axes(handles.axes2);

imshow(WM);

% --- Executes on button press in pushbutton3.

function pushbutton3_Callback(hObject, eventdata, handles)

% hObject handle to pushbutton3 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

[filename1,pathname1]=uigetfile('*.*','Chon anh goc');

oimg=imread(num2str(fullfile(pathname1,filename1)));

[a b]=size(oimg);

if ndims(oimg)

disp(a);

b=b/3;

disp(b);

oimg=imresize(oimg,[512,512]);

R=oimg(:,:,1);

G=oimg(:,:,2);

B=oimg(:,:,3);

else

R=imresize(oimg,[512,512]);

end

R=double(R);

[A,H,V,D]=dwt2(R,'haar');

f=A;

[filename2,pathname2]=uigetfile('*.*','Chon thuy van');

WM=imread(num2str(fullfile(pathname2,filename2)));

if ndims(WM)

WM=rgb2gray(WM);

end

WM=imresize(WM,[512,512]);

WM=imresize(WM,[256,256]);

WB=double(WM);

c=0.01;

F= f + (c.*abs(f).*WB);

[p q]=size(f);

for i=1:p

for j=1:q

ncA(i,j)=F(i,j);

end

end

if ndims(oimg)

Rimg=idwt2(ncA,V,H,D,'haar');

Wimg(:,:,1)=Rimg;

Wimg(:,:,2)=G;

Wimg(:,:,3)=B;

else

Wimg=idwt2(ncA,V,H,D,'haar');

end

Wimg=imresize(Wimg,[a b]);

[filename3,pathname3]=uiputfile('*.jpg');

imwrite(uint8(Wimg),fullfile(pathname3,filename3));

b=imread(fullfile(pathname3,filename3));

axes(handles.axes3);

imshow(b);