how to pass an image from a push button to function ?

I have created two push buttons to browse images for the original and target images and these images are taken for the further process.

function pushbutton1_Callback(hObject, eventdata, handles)

[original pathname1] = uigetfile({'*.jpg';'*.bmp'},'File Selector');

   handles.originalImage = strcat(pathname1, original);

   guidata(hObject,handles);

% --- Executes on button press in pushbutton2.

function pushbutton2_Callback(hObject, eventdata, handles)

[target pathname2] = uigetfile({'*.jpg';'*.bmp'},'File Selector');

   handles.targetImage = strcat(pathname2, target);

   guidata(hObject,handles);

% --- Executes on button press in pushbutton3.

function pushbutton3_Callback(hObject, eventdata, handles)

   proceed=msgbox('operation completed');

   if isfield(handles,'originalImage')

     original=msgbox('original image uploaded successfully');

     im1=handles.originalImage

   end

   if isfield(handles,'targetImage')

     target=msgbox('target image uploaded successfully');

     im2=handles.targetImage 

   end

   Mosaic=ritfn(im1,im2);

Another function

function [Mosaic] = ritfn(im1,im2)

%UNTITLED Summary of this function goes here

%   Detailed explanation goes here

%Prepare Workspace

clear;clc;close all

%%Read Secret and Target images;

S=imread(im1);                            %Secret Image

T=imread(im2);                      %Target Image 

M=256;

N=192;

S=imresize(S,[M,N]);

T=imresize(T,[M,N]);

end

But the problem is

Reference to a cleared variable im1.

Error in ritfn (line 7)

S=imread(im1);                            %Secret Image

Error in rdhgui>pushbutton3_Callback (line 101)

   Mosaic=ritfn(im1,im2);

Error in gui_mainfcn (line 96)

          feval(varargin{:});

Error in rdhgui (line 42)

      gui_mainfcn(gui_State, varargin{:});

Error in

@(hObject,eventdata)rdhgui('pushbutton3_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uicontrol Callback

Answer 1

[Image Analyst]

When you cleared all variables in ritfn with this:

clear;clc;close all

you blew away im1 and im2. Delete that line!

Another problem you will encounter: ritfn() never assigns the output variable Mosaic, but you expect it to return a variable by that name.

[Riya Augustine]

Thank you so much !!