MATLAB: GUI

guiimage processingMATLAB

Hey, Im trying to build a GUI for the Quality Assessment tools of an X-Ray machine. In this , i have to load an image and then do various operations on it. I have created a push button to load my image and another push button to do operations on it. I have to send the image from the callback of the Load Push Button to the callback of the push button of the Operations. Please help me how to do this! Thanks a lot.

Gaurav

Best Answer

Hi,

In callback of Load Push Button you should write like this :

handles.output = hObject;
[fn pn] = uigetfile('*.jpg','select image');
if fn ~= 0
    handles.I = imread(fullfile(pn,fn));
    imshow(handles.I);
end
guidata(hObject, handles);

In the other pushbutton, I will threshold the image.

And then in the other push button you can call the image by :

handles.output = hObject;
handles.bw = im2bw(handles.I);
imshow(handles.bw);
guidata(hObject, handles);

Related Solutions

MATLAB: Getappdata and setappdata

Hello,

I will give you sample code for this topic.

I have a .fig file (figure) that consists of 2 axes (axes1 and axes2) and 2 pushbutton (pushbutton1 and pushbutton2).

Then, here the m-file code

function varargout = untitled(varargin)
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @untitled_OpeningFcn, ...
                   'gui_OutputFcn',  @untitled_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
function untitled_OpeningFcn(hObject, eventdata, handles, varargin)
    handles.output = hObject;
    guidata(hObject, handles);
function varargout = untitled_OutputFcn(hObject, eventdata, handles) 
    varargout{1} = handles.output;
function pushbutton1_Callback(hObject, eventdata, handles)
    I = imread('cameraman.tif');
    imagesc(I, 'parent', handles.axes1);
    setappdata(handles.pushbutton1,'img',I);
function pushbutton2_Callback(hObject, eventdata, handles)
    J = getappdata(handles.pushbutton1,'img');
    bw = im2bw(J);
    imagesc(bw, 'parent', handles.axes2);

Watch at pushbutton1_callback. Fisrt I read image with command imread and display it to the axes1.

Then after finished, I store the variable I to the handle : 'pushbutton1' as name : 'img' with command :

setappdata(handles.pushbutton1,'img',I);

Then watch at pushbutton2_callback

I used command

J = getappdata(handles.pushbutton1,'img');

to get the the last value which I stored at handle 'pushbutton1' which name = 'img'.

And then I successfully create a binary image with input parameter 'J'

MATLAB: How to put pictures in a GUI that opens from the main GUI!

Valarie - your line of code

 open('help01.fig');

just opens or displays the figure corresponding to the GUI but does not perform any of the initializations that would occur when launching the GUI correctly. Replace this callback with just

 function pushbutton16_Callback(hObject, eventdata, handles)
 help01;

to launch the GUI when pressing this pushbutton 16. Note also, that if you want to show the image when the help GUI launches, you must put that command in the OpeningFcn of your GUI (not the pushbutton 5 unless you intend the image to load when the user presses this button).

Best Answer

Related Solutions

MATLAB: Getappdata and setappdata

MATLAB: How to put pictures in a GUI that opens from the main GUI!

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