Unable to process multiple files in Matlab GUI

Question

Warid Islam 2021-4-4

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/792017-unable-to-process-multiple-files-in-matlab-gui

评论： Rik 2021-4-8

Hello Everyone,

I have created a Matlab GUI where I would load multiple images by clicking a button. I would then segment all the images together by clicking the segment button. I could load mutiple images together properly by clicking the Load button . However, I am unable to segment those mutiple images together when I click the Segment button. I have attached few images. Any help would be appreciated. Please find my code below:

function varargout = ngui(varargin)
% NGUI MATLAB code for ngui.fig
%      NGUI, by itself, creates a new NGUI or raises the existing
%      singleton*.
%
%      H = NGUI returns the handle to a new NGUI or the handle to
%      the existing singleton*.
%
%      NGUI('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in NGUI.M with the given input arguments.
%
%      NGUI('Property','Value',...) creates a new NGUI or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before ngui_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to ngui_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 ngui
% Last Modified by GUIDE v2.5 30-Mar-2021 22:59:22
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @ngui_OpeningFcn, ...
                   'gui_OutputFcn',  @ngui_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 ngui is made visible.
function ngui_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 ngui (see VARARGIN)
% Choose default command line output for ngui
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes ngui wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = ngui_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)
% Specify the folder where the files live.
myFolder = 'D:\regionGrowing_MLT\Images';
% Check to make sure that folder actually exists.  Warn user if it doesn't.
if ~isfolder(myFolder)
    errorMessage = sprintf('Error: The following folder does not exist:\n%s\nPlease specify a new folder.', myFolder);
    uiwait(warndlg(errorMessage));
    myFolder = uigetdir(); % Ask for a new one.
    if myFolder == 0
         % User clicked Cancel
         return;
    end
end
% Get a list of all files in the folder with the desired file name pattern.
filePattern = fullfile(myFolder, '*.jpg'); % Change to whatever pattern you need.
theFiles = dir(filePattern);
num_files=length(theFiles);
imgs=cell(1,num_files);
for k = 1 : length(theFiles)
    baseFileName = theFiles(k).name;
    fullFileName = fullfile(theFiles(k).folder, baseFileName);
    fprintf(1, 'Now reading %s\n', fullFileName);
    % Now do whatever you want with this file name,
    % such as reading it in as an image array with imread()
    imageArray = imread(fullFileName);
    imshow(imageArray);  % Display image.
    drawnow; % Force display to update immediately.
    InputImage=imageArray(:,k);
    
    axes(handles.axes1);
   
    
    handles.InputImage=InputImage;
end
    % Update handles structure
guidata(hObject, handles);
% --- 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)
for k = 1 : length(theFiles)
    InputImage=handles.InputImage;
%     InputImage=handles.InputImage;
    InputImage=rgb2gray(InputImage);
    x=300; y=340;
    a=imgaussfilt(InputImage,2);
    b=adapthisteq(a);
    m=regiongrowing_MLT(b,x,y,12);
    m=imfill(m,'holes');
    % figure,imshow(m)
    bw=imbinarize(m);
    bw=bwareafilt(bw,1);
    % figure,imshow(bw)
    I = imresize(InputImage,.5);  %-- make image smaller 
    m1 = imresize(bw,.5);  %     for fast computation
    % subplot(2,2,1); imshow(I); title('Input Image');
    % subplot(2,2,2); imshow(m1); title('Initialization');
    % subplot(2,2,3); title('Segmentation');
    seg = region_seg(I, m1, 30); %-- Run segmentation
    % subplot(2,2,4); imshow(seg); title('Global Region-Based Segmentation');
    imshow(seg);
    axes(handles.axes2);
    handles.seg=seg;
end
guidata(hObject, handles);

The following error message is displayed

Unrecognized function or variable 'theFiles'.

Error in ngui>pushbutton2_Callback (line 124)

for k = 1 : length(theFiles)

Error in gui_mainfcn (line 95)

feval(varargin{:});

Error in ngui (line 42)

gui_mainfcn(gui_State, varargin{:});

Error in

matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)ngui('pushbutton2_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating UIControl Callback.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2021-4-4

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/792017-unable-to-process-multiple-files-in-matlab-gui#answer_666382

The files is not defined in that pushbutton. Please attach your .fig file so I can fix it.

https://matlab.fandom.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F

Your pushbutton1_Callback() should fill up a listbox, not just repeatedly overwrite an array imageArray and then do nothing with it.

10 个评论
显示 8更早的评论隐藏 8更早的评论

Warid Islam 2021-4-7

在 MATLAB Online 中打开

Hi @Image Analyst,

I have managed to fix the above issue. However, I am facing a new problem. The images are loaded together properly when I click the Load button. But, When I click the Segment button, the segmentation is done only on the last image on the folder rather than on all the images from the folder. It seemed the images in the Load pushbutton callback function are overwritten rather than being stored properly.

function varargout = ngui(varargin)
% NGUI MATLAB code for ngui.fig
%      NGUI, by itself, creates a new NGUI or raises the existing
%      singleton*.
%
%      H = NGUI returns the handle to a new NGUI or the handle to
%      the existing singleton*.
%
%      NGUI('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in NGUI.M with the given input arguments.
%
%      NGUI('Property','Value',...) creates a new NGUI or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before ngui_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to ngui_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 ngui
% Last Modified by GUIDE v2.5 06-Apr-2021 00:32:44
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @ngui_OpeningFcn, ...
                   'gui_OutputFcn',  @ngui_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 ngui is made visible.
function ngui_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 ngui (see VARARGIN)
% Choose default command line output for ngui
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes ngui wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = ngui_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)
% Specify the folder where the files live.
myFolder = 'D:\regionGrowing_MLT\';
% Check to make sure that folder actually exists.  Warn user if it doesn't.
if ~isfolder(myFolder)
    errorMessage = sprintf('Error: The following folder does not exist:\n%s\nPlease specify a new folder.', myFolder);
    uiwait(warndlg(errorMessage));
    myFolder = uigetdir(); % Ask for a new one.
    if myFolder == 0
         % User clicked Cancel
         return;
    end
end
% Get a list of all files in the folder with the desired file name pattern.
filePattern = fullfile(myFolder, '*.jpg'); % Change to whatever pattern you need.
theFiles = dir(filePattern);
num_files=length(theFiles);
imgs=cell(1,num_files);
for k = 1 : length(theFiles)
    baseFileName = theFiles(k).name;
    fullFileName = fullfile(theFiles(k).folder, baseFileName);
    fprintf(1, 'Now reading %s\n', fullFileName);
    % Now do whatever you want with this file name,
    % such as reading it in as an image array with imread()
    imageArray = imread(fullFileName);
    imshow(imageArray,'parent',handles.axes1);  % Display image.
    drawnow; % Force display to update immediately.
    
    InputImage=imageArray;
    
   
   
    handles.theFiles=theFiles;
    handles.InputImage=InputImage;
end
setappdata(handles.pushbutton1,'img',InputImage);
    % Update handles structure
guidata(hObject, handles);
% --- 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)
J = getappdata(handles.pushbutton1,'img');
J=rgb2gray(J);
x=300; y=340;
a=imgaussfilt(J,2);
b=adapthisteq(a);
m=regiongrowing_MLT(b,x,y,12);
m=imfill(m,'holes');
% figure,imshow(m)
bw=imbinarize(m);
bw=bwareafilt(bw,1);
% figure,imshow(bw)
I = imresize(J,.5);  %-- make image smaller 
m1 = imresize(bw,.5);  %     for fast computation
seg = region_seg(J, m1, 30); %-- Run segmentation
imshow(seg,'parent',handles.axes2);
    handles.seg=seg;
    guidata(hObject, handles);

Warid Islam 2021-4-8

在 MATLAB Online 中打开

new.mlapp

Hi @Rik,

I tried using the APP DESIGNER. I could load the image in the GUI but I am having some errors while segmenting the image by clicking the Segment button.

Error using matlab.ui.control.Image/set.ImageSource (line 123)
ImageSource value must be a valid file path, or an m-by-n-by-3 color data matrix.
Error in new/SegmentButtonPushed (line 69)
app.Image2.ImageSource=finalimg;
 
Error using matlab.ui.control.internal.controller.ComponentController/executeUserCallback (line 386)
Error while evaluating Button PrivateButtonPushedFcn.

Rik 2021-4-8

A GUI is a graphical user interface. You should make sure your code works first, before you build a GUI around it.

Regarding that error message, what don't you understand from it? You wrote the code, so you must understand what you want to do. What are you providing as input? The error message suggest it should be either a path, or an RGB image.

请先登录，再进行评论。

Unable to process multiple files in Matlab GUI

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

回答（1 个）

10 个评论
显示 8更早的评论隐藏 8更早的评论

另请参阅

类别

标签

产品

版本

Community Treasure Hunt

Unable to process multiple files in Matlab GUI

0 个评论 显示 -2更早的评论隐藏 -2更早的评论

回答（1 个）

10 个评论 显示 8更早的评论隐藏 8更早的评论

另请参阅

类别

标签

产品

版本

Community Treasure Hunt

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

10 个评论
显示 8更早的评论隐藏 8更早的评论