I'm working on basic GUI in Matlab-2012a. I wanted to display the select and display the image using a push button.
Here's my code:
% --- 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)
global TrainingData;
global filenames;
TrainingData={};
[filenames, pathname] = uigetfile({'*.jpg';'*.png';'*.bmp'});
if ~ischar(filenames) % on cancel press you display a message of error with errordlg
errordlg('Error!','No file selected'); % displays an error message by means of errordlg function
return;
end
axes(handles.myaxesImage);
imshow(filenames);
I can browse the image, but I'm not able to display the same. I'm getting the following Error Message:
Reference to non-existent field 'axesImage'.
Error in GUI>pushbutton2_Callback (line 93)
axes(handles.axesImage);
Error in gui_mainfcn (line 96)
feval(varargin{:});
Error in GUI (line 42)
gui_mainfcn(gui_State, varargin{:});
Error in
#(hObject,eventdata)GUI('pushbutton2_Callback',hObject,eventdata,guidata(hObject))
Error while evaluating uicontrol Callback
Any Suggestions?
Thank you in advance.
According to your code
axes(handles.myaxesImage);
MATLAB said
Reference to non-existent field 'axesImage'
So there is a problem for MATLAB to recognize object handles.myaxesImage
Because it doesn't exist!
Here is an example
In the .m file of my GUI
I want to show image on axes whose tag is axes1
function openFile_Callback(hObject, eventdata, handles)
% hObject handle to openFile (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
%== GUI get file in the folder ==%
[FileName,PathName] = uigetfile({'*.tif';'*.jpg';'*.png'},'Select a image file');
%== Create a object handles.img to load image ==%
handles.img = imread(FileName);
%== call axes whose tag is axes1 to show image ==%
axes(handles.axes1);
imshow(handles.img);
guidata(hObject, handles);
Next time you want to use any varable in GUI
Don't forget to check whether that object exists
Hope it helps
Related
I have a code that utilizes information taken over serial, compares it to a stored string, and then changes the color values of a panel in a GUI. this is done for 2 different panels. once the strcmp for both panels is 1, a button is enabled to close the GUI. i want to use a simple closereq() function to close it, but that wasn't working. to try something different, I commented out the closereq() and added in a disp('Success'). When pressing the button, Success will appear in the command window, but only after I manually pause the program from the editor panel.
this is my code:
function varargout = WorkingGUI3(varargin)
% WORKINGGUI3 MATLAB code for WorkingGUI3.fig
% WORKINGGUI3, by itself, creates a new WORKINGGUI3 or raises the existing
% singleton*.
%
% H = WORKINGGUI3 returns the handle to a new WORKINGGUI3 or the handle to
% the existing singleton*.
%
% WORKINGGUI3('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in WORKINGGUI3.M with the given input arguments.
%
% WORKINGGUI3('Property','Value',...) creates a new WORKINGGUI3 or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before WorkingGUI3_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to WorkingGUI3_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 WorkingGUI3
% Last Modified by GUIDE v2.5 02-Oct-2019 14:53:57
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', #WorkingGUI3_OpeningFcn, ...
'gui_OutputFcn', #WorkingGUI3_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 WorkingGUI3 is made visible.
function WorkingGUI3_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 WorkingGUI3 (see VARARGIN)
handles.uipanels = [handles.uipanel1, handles.uipanel2];
set(handles.pushbutton5, 'enable', 'off');
% Choose default command line output for WorkingGUI3
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes WorkingGUI3 wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = WorkingGUI3_OutputFcn(hObject, eventdata, handles)
delete(instrfind('Port', 'COM3'));
tag = serial('COM3');
fopen(tag);
BOX = char(zeros(2,14)); % matrix to be populated with incoming serial data
TrueValueData = 'C:\RfidChipTrueValues.xlsx';
[~,~,TrueValMat] = xlsread(TrueValueData);
% Creates matrix filled with the correct values
% indexed by box, which is the first row
% all proceeding rows are the master value
for i=1:inf
for n = 1:2
if i>10
readData = fscanf(tag);
if length(readData)>12
BOX(str2double(readData(8)),1:14)= readData(11:24);
if strcmp(TrueValMat{2,n}, BOX(n,:))
set(handles.uipanels(n), 'BackgroundColor', 'g');
else
set(handles.uipanels(n), 'BackgroundColor', 'r');
end
drawnow
if strcmp(TrueValMat{2,1}, BOX(1,:))...
&& strcmp(TrueValMat{2,2}, BOX(2,:)) == 1
set(handles.pushbutton5, 'enable', 'on');
end
end
end
end
end
% 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 pushbutton5.
function pushbutton5_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton5 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
%closereq();
disp('It Works')
the final section
% --- Executes on button press in pushbutton5.
function pushbutton5_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton5 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
%closereq();
disp('Success')
holds the callback to the button. I know its it correctly connected to the .fig because pressing the button makes Success appear, but only after manually pausing the program.
any help would be much appreciated.
As #Rotem showed, adding a pause after the first for loop successfully allowed the program to close.
i would like to practice on designing GUI in matlab ,this GUI has two function -one for selecting of image and second for filtering,general structure of such Graphical interface is very simple
and here is two code -one which select image after pressing on select image and second which filters image using simple average filter after clicking on filter image
function select_image_Callback(hObject, eventdata, handles)
% hObject handle to select_image (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';'*.png'},'File select');
image=strcat(pathname,filename);
axes(handles.axes1);
imshow(image);
and for filtering
function filter_image_Callback(hObject, eventdata, handles)
% hObject handle to filter_image (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
h = ones(5,5) / 25;
Filtered_image = imfilter(image,h);
axes(handles.axes2);
imshow(Filtered_image);
but when i run code, i selected simple this file
i got following error
Error using imfilter
Expected input number 1, A, to be one of these types:
numeric, logical
Instead its type was matlab.graphics.primitive.Image.
Error in imfilter>parse_inputs (line 186)
validateattributes(a,{'numeric' 'logical'},{'nonsparse'},mfilename,'A',1);
Error in imfilter (line 118)
[a, h, boundary, sameSize, convMode] = parse_inputs(varargin{:});
Error in filter_image_filter_image_Callback (line 92)
Filtered_image = imfilter(image,h);
Error in gui_mainfcn (line 95)
feval(varargin{:});
Error in filter_image (line 42)
gui_mainfcn(gui_State, varargin{:});
Error in #(hObject,eventdata)filter_image('filter_image_Callback',hObject,eventdata,guidata(hObject))
Error while evaluating UIControl Callback
why happens this? thanks in advance
based on my question and related to problem, i have decided to include my solution as well ,which i found after researching, here is fragments of my code, first of thanks to # Benoit_11 for his advice and i have changed name from image to selected_image, related to my comment about accessing one variable(in this case image) form another function i used function getimage, so there is my complete solution
function select_image_Callback(hObject, eventdata, handles)
% hObject handle to select_image (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';'*.png'},'File select');
selected_image=strcat(pathname,filename);
axes(handles.axes1);
imshow(selected_image);
% --- Executes on button press in filter_image.
function filter_image_Callback(hObject, eventdata, handles)
% hObject handle to filter_image (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
selected_image=getimage(handles.axes1);
h = ones(5,5) / 25;
Filtered_image = imfilter(selected_image,h);
axes(handles.axes2);
imshow(Filtered_image);
I try to import a excel data in uitable by using pushbutton in matlab gui. The 1st column consists of date, while importing the first column is replaced by second column and the last column remains empty. My code is given below, kindly help me to solve this issue.
function pushbuttonLoadData_Callback(hObject, eventdata, handles)
% hObject handle to pushbuttonLoadData (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
handles.output = hObject;
filename=uigetfile({'*.xls';'*.csv'});
handles.filename=filename;
[data,colNames] = xlsread(filename);
class(colNames)
size(colNames)
colNames{1,1}
set(handles.uitable1,'Data',data,'ColumnName',colNames(1,:));
After loading an image into a Matlab GUI, how can I pass that image using pushbutton to another Matlab file? When I push the button in my GUI, the image should be passed to my Matlab code.
Here is my GUI code
% --- 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)
[filename,pathname]=uigetfile(...
{'*.jpg;*.gif;*.png;*.bmp',...
'image file(*.jpg,*.gif,*.png,*.bmp)';'*.*','all files(*.*)'},...
'open the image file to be verified');
fullimagefilename = fullfile(pathname,filename);
axes1 = imread(fullimagefilename);
axes(handles.axes1);
image(axes1);
%axes(handles.axes1);
%imshow('E:\degraded images\3.jpg')
% --- 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)
-pushbutton 1 is used to browse file .
-and by pushbutton2 i want to pass the browsed file to my base file and its code is
im=imread('E:\degraded images\3.jpg');
hsv = rgb2hsv(im);
hueImage = hsv(:,:, 1);
meanHue = mean2(hueImage);
figure, imshow(im);
title(meanHue);
%figure , imshow(im);
%im = imresize(im, 0.5);
%im2 = imread('E:\degraded images\3.jpg') ;
im2= im;
im=im(:,:,1);
sigmaA=8;
sigmaB=10;
sigmaMax=max([sigmaA sigmaB]);
fsz=[sigmaMax, sigmaMax];
If I understand correctly, the GUI uses pushbutton1 to allow the user to choose a file and display it in the axes. When the user presses the other button, pushbutton2, which is presumably on the same GUI, you want the callback for that button to have access to the selected (or browsed) image.
This can be done by creating a field in the handles structure for the selected image data, then storing this data using the guidata function.
In your first callback, do something like the following
function pushbutton1_Callback(hObject, eventdata, handles)
[filename,pathname]=uigetfile(...
{'*.jpg;*.gif;*.png;*.bmp',...
'image file(*.jpg,*.gif,*.png,*.bmp)';'*.*','all files(*.*)'},...
'open the image file to be verified');
% need to handle the case where the user presses cancel
if filename~=0
fullimagefilename = fullfile(pathname,filename);
% create an img field in handles for the image that is being loaded
handles.img = imread(fullimagefilename);
axes(handles.axes1);
image(handles.img);
% save the application data
guidata(hObject,handles);
end
Now in your second callback, you can access this file through the handles struct
function pushbutton2_Callback(hObject, eventdata, handles)
% check to ensure that img exists in handles
if isfield(handles,'img')
% copy the image from the handles structure
im=handles.img;
% continue with your code
hsv = rgb2hsv(im);
% etc.
end
And that is it - the first callback saves the image to the handles structure as a field within it, and the second callback retrieves that image from handles via the img field.
Try it out and see what happens!
I am trying to make a GUI in Matlab with 2 views and 2 buttons.
In first view I want to show a video captured from webcam in real time and in second view I want to display a screenshot of video from first view when I press the "Capture image" button.
The problem is that when I press the "Capture image" button, the video and the screenshot switches their positions. I want the screenshot in the second view.
Here is my code:
% --- Executes on button press in startStopCamera.
function startStopCamera_Callback(~, ~, handles)
% hObject handle to startStopCamera (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Start/Stop Camera
if strcmp(get(handles.startStopCamera,'String'),'Start Camera')
% Camera is off. Change button string and start camera.
set(handles.startStopCamera,'String','Stop Camera')
axesHandle= findobj(gcf,'Tag','VideoCapture');
preview(axesHandle, handles.video);
start(handles.video)
set(handles.captureImage,'Enable','on');
% Update handles structure
guidata(hObject, handles);
else
% Camera is on. Stop camera and change button string.
set(handles.startStopCamera,'String','Start Camera')
% axes(handles.VideoCapture);
stop(handles.video)
set(handles.captureImage,'Enable','off');
end
end
% --- Executes on button press in captureImage.
function captureImage_Callback(~, ~, handles)
% hObject handle to captureImage (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
axesHandle= findobj(gcf,'Tag','Screenshot');
frame = getsnapshot(handles.video);
%frame = get(get(handles.Screenshot,'children'),'cdata'); % The current displayed frame
preview(axesHandle, frame);
end