i am creating a gui .first image is uploaded but when i am going to process button it is direct to previous step . the process button dose not work .what can i do?

function varargout = ui(varargin)
% UI MATLAB code for ui.fig
%      UI, by itself, creates a new UI or raises the existing
%      singleton*.
%
%      H = UI returns the handle to a new UI or the handle to
%      the existing singleton*.
%
%      UI('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in UI.M with the given input arguments.
%
%      UI('Property','Value',...) creates a new UI or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before ui_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to ui_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 ui

% Last Modified by GUIDE v2.5 20-Jun-2017 16:16:26

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @ui_OpeningFcn, ...
                   'gui_OutputFcn',  @ui_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 ui is made visible.
function ui_OpeningFcn(hObject, eventdata, handles, varargin)
handles.output = hObject;
guidata(hObject, handles);

% UIWAIT makes ui wait for user response (see UIRESUME)
% uiwait(handles.figure1);

% --- Outputs from this function are returned to the command line.
function varargout = ui_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;

figure1.text = 'upload image'
% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
[filename, pathname] = uigetfile({'*.bmp';'*.jpg';'*.gif';'*.*'}, 'Pick an Image File');
S = imread([pathname,filename]);
axes(handles.axes1);
imshow(S);
handles.f=[pathname,filename];
guidata(hObject, handles);
figure1.text = 'image uploaded'

% --- Executes during object creation, after setting all properties.
function axes1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to axes1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: place code in OpeningFcn to populate axes1

% --- 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)

%[filename,pathname] = uigetfile({'*.*';'*.bmp'; '*.jpg'; '*.gif'; '*.tiff'}, 'Pick an Image File');
%s = strcat(pathname, filename);
a = uigetfile();
filename = a;
setappdata(0,'filename',filename);

if filename == -1
  error('Failed to open file.')
  msgbox('Failed to open file.');
end

a = imread(a);
   % if isequal(filename,0) || isequal(pathname,0)
      %       disp('User pressed cancel')
      %  else
      %       disp(['User selected ', fullfile(pathname, filename)])

         % end

axes(handles.axesimg);
imshow(a); 
setappdata(0,'a',a);
setappdata(0,'filename',a);
assignin('base','a',a);
plot(handles.axesimg,'a')
%handles.f = [filename];
%guidata(object_handle,handles);
disp('Reading the image into variable X');
    [X,map] = imread(filename);
    assignin('base','X',X); 
    assignin('base','map',map); 

assignin('base','width',200); 
assignin('base','height',200);

edittimes.Visible = 'off';

function process_Callback(hObject, eventdata, handles)
% hObject    handle to process (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
I= getappdata(0,'a');
%a_binary_image=improcess(a,[140 160 260 280]);
%Small region is taken to show output clear
binary_image = binary_image(120:400,20:250);
figure;imshow(binary_image);title('binary_image');

%Thinning
thin_image=~bwmorph(binary_image,'thin',Inf);
figure;imshow(thin_image);title('Thinned Image');

%Minutiae extraction
s=size(thin_image);
N=3;
n=(N-1)/2;
r=s(1)+2*n;
c=s(2)+2*n;
double temp(r,c);   
temp=zeros(r,c);bifurcation=zeros(r,c);ridge=zeros(r,c);
temp((n+1):(end-n),(n+1):(end-n))=thin_image(:,:);
outImg=zeros(r,c,3);
outImg(:,:,1) = temp .* 255;
outImg(:,:,2) = temp .* 255;
outImg(:,:,3) = temp .* 255;
for x=(n+1+10):(s(1)+n-10)
    for y=(n+1+10):(s(2)+n-10)
        e=1;
        for k=x-n:x+n
            f=1;
            for l=y-n:y+n
                mat(e,f)=temp(k,l);
                f=f+1;
            end
            e=e+1;
        end;
         if(mat(2,2)==0)
            ridge(x,y)=sum(sum(~mat));
            bifurcation(x,y)=sum(sum(~mat));
         end
    end;
end;

[ridge_x ridge_y]=find(ridge==2);
len=length(ridge_x);

for i=1:len
    outImg((ridge_x(i)-3):(ridge_x(i)+3),(ridge_y(i)-3),2:3)=0;
    outImg((ridge_x(i)-3):(ridge_x(i)+3),(ridge_y(i)+3),2:3)=0;
    outImg((ridge_x(i)-3),(ridge_y(i)-3):(ridge_y(i)+3),2:3)=0;
    outImg((ridge_x(i)+3),(ridge_y(i)-3):(ridge_y(i)+3),2:3)=0;

      outImg((ridge_x(i)-3):(ridge_x(i)+3),(ridge_y(i)-3),1)=255;
      outImg((ridge_x(i)-3):(ridge_x(i)+3),(ridge_y(i)+3),1)=255;
      outImg((ridge_x(i)-3),(ridge_y(i)-3):(ridge_y(i)+3),1)=255;
      outImg((ridge_x(i)+3),(ridge_y(i)-3):(ridge_y(i)+3),1)=255;
  end

[bifurcation_x bifurcation_y]=find(bifurcation==4);
len=length(bifurcation_x);
for i=1:len
    outImg((bifurcation_x(i)-3):(bifurcation_x(i)+3),(bifurcation_y(i)-3),1:2)=0;
    outImg((bifurcation_x(i)-3):(bifurcation_x(i)+3),(bifurcation_y(i)+3),1:2)=0;
    outImg((bifurcation_x(i)-3),(bifurcation_y(i)-3):(bifurcation_y(i)+3),1:2)=0;
    outImg((bifurcation_x(i)+3),(bifurcation_y(i)-3):(bifurcation_y(i)+3),1:2)=0;

      outImg((bifurcation_x(i)-3):(bifurcation_x(i)+3),(bifurcation_y(i)-3),3)=255;
      outImg((bifurcation_x(i)-3):(bifurcation_x(i)+3),(bifurcation_y(i)+3),3)=255;
      outImg((bifurcation_x(i)-3),(bifurcation_y(i)-3):(bifurcation_y(i)+3),3)=255;
      outImg((bifurcation_x(i)+3),(bifurcation_y(i)-3):(bifurcation_y(i)+3),3)=255;
  end
  figure;imshow(outImg);title('Minutiae');

[Geoff Hayes]

indrani - please clarify what you mean by the process button does not work.

Also, this seems to be a duplicate of https://www.mathworks.com/matlabcentral/answers/345787-i-m-looking-to-create-another-push-button-which-will-convert-browse-image-to-binary-of-the-image-i-r. If this is the case, then please delete this post.