Create a gui in matlab - matlab

Question

I want to create a gui in matlab with a push button and a panel.
Requirements: Upon clicking the button the dialogue must open to choose a file and after selecting image from this dialogue the image must be shown to that panel of gui.
How do I do this?
How to show the image on the gui panel?
My current status so far:
function pushbutton1_Callback(hObject, eventdata, handles)
[filename, pathname] = ...
uigetfile({'*.jpg';'*.png';'*.jpeg';'*.bmp';'*.*'},'File Selector');
set(handles.axes2, 'Visible','on');
imshow(IMG,'Parent',TheAxisHandleToDrawOn)
if isequal(filename,0)
disp('Image upload Canceled')
end
I tried this but it's not working, how to do this?

Answer 1

With respect to your callback you have first to read the selected image by using imread; you can use fullfile to build the complete filename.
Then you use the matrix returned by imread as input for the imshow function.
Edit following the comments
In order to show the image within a uipanel you have to add an axes in the panel and use it as parent in the call to imshow.
If the image you want to display is not in the current folder or in a folder on the MATLAB path, you have to specify the full path name (ref. imread).
In the following you can find the .m file of the GUI I've build for test.
The GUI contains:
an axes (tag: axes2)
a uipanel (tag: uipanel1)
an axes (tag: axes_up) embedded in the uipanel
two radiobuttons (tag: radiobutton1 and radiobutton2) to select the axes on which to show the image
two statictext fields (tag: text2 and text3) to show the filename of the selected images
a pushbutton (tag: pushbutton1) to select the image to be displayed
a pushbutton (tag: pushbutton3) to run the imcontrast tool in case of selection of a .dcm image
The code has been tested on R2012b and 2015b.
function varargout = disp_fig(varargin)
% DISP_FIG MATLAB code for disp_fig.fig
% DISP_FIG, by itself, creates a new DISP_FIG or raises the existing
% singleton*.
%
% H = DISP_FIG returns the handle to a new DISP_FIG or the handle to
% the existing singleton*.
%
% DISP_FIG('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in DISP_FIG.M with the given input arguments.
%
% DISP_FIG('Property','Value',...) creates a new DISP_FIG or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before disp_fig_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to disp_fig_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 disp_fig
% Last Modified by GUIDE v2.5 25-Apr-2016 14:18:18
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', #disp_fig_OpeningFcn, ...
'gui_OutputFcn', #disp_fig_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 disp_fig is made visible.
function disp_fig_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 disp_fig (see VARARGIN)
% Choose default command line output for disp_fig
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes disp_fig wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = disp_fig_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)
% Select the image to be displayed
[filename, pathname] = ...
uigetfile({'*.jpg';'*.png';'*.jpeg';'*.bmp';'*.*'},'File Selector');
% Build the full filename
img_file=fullfile(pathname,filename)
% Split the filename to get its extension
[the_path,the_name,the_ext]=fileparts(img_file);
% Set the current StaticText uicontrol based on the selected RadioButton
curr_txt=handles.text2;
if(get(handles.radiobutton2,'value'))
curr_txt=handles.text3;
end
% Check for image valid selection
if isequal(filename,0)
disp('Image upload Canceled')
set(curr_txt,'string','Image upload Canceled')
else
% If an image has been selected
set(curr_txt,'string',img_file)
% If the image is a ".dcm"
if(strcmp(the_ext,'.dcm'))
% Read it with dicomread and enable the pushbutton to run the
% IMCONTRAST tool
IMG=dicomread(img_file);
set(handles.pushbutton3,'visible','on')
else
% If the image is a ".jpg", ".bmp", ...
% Read it with imread and disable the pushbutton to run the
% IMCONTRAST tool
IMG=imread(img_file);
set(handles.pushbutton3,'visible','off')
end
% Identify the axes on which to display the image according to the
% selected radiobutton
if(get(handles.radiobutton1,'value'))
the_parent=handles.axes2;
set(handles.axes2, 'Visible','on');
else
the_parent=handles.axes_up;
end
% Showthe image
imshow(IMG,'Parent',the_parent)
end
% --- Executes on button press in radiobutton1.
function radiobutton1_Callback(hObject, eventdata, handles)
% hObject handle to radiobutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of radiobutton1
% If the first radiobutton has been selected, disable the second onre
r1=get(handles.radiobutton1,'value');
if(r1)
set(handles.radiobutton2,'value',0);
end
% --- Executes on button press in radiobutton2.
function radiobutton2_Callback(hObject, eventdata, handles)
% hObject handle to radiobutton2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of radiobutton2
% If the second radiobutton has been selected, disable the first one
r2=get(handles.radiobutton2,'value');
if(r2)
set(handles.radiobutton1,'value',0);
end
% --- 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)
% Run the IMCONTRAST tool to the proper axes according to the selected
% radiobutton
r1=get(handles.radiobutton1,'value');
if(r1)
imcontrast(handles.axes2)
else
imcontrast(handles.axes_up)
end
Structure of the GUI
The GUI ... working
To test the .dcm image display I've used, as examples, the images from DICOM sample image sets.
Hope this helps.
Qapla'

Answer 2

this is the final solution for the problem
function browse_Callback(hObject, eventdata, handles)
% hObject handle to browse (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( {'.jpg';'.gif';'.png';'.bmp'},'Select file');
MyImage = strcat(pathname, filename);
%This code checks if the user pressed cancel on the dialog.
if isequal(filename,0) || isequal(pathname,0)
uiwait(msgbox ('User pressed cancel','failed','modal') )
hold on;
else
uiwait(msgbox('User selected image sucessfully','sucess','modal'));
hold off;
imshow(MyImage,'Parent',handles.axes1);
end
global Imagevariable;
Imagevariable=MyImage;
handles.output = hObject;
guidata(hObject, handles);