getting error in gui

Question

priti kale 2019-2-25

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/446923-getting-error-in-gui

评论： Geoff Hayes 2019-3-3

I have error is below=

Error in gui_mainfcn (line 95)
        feval(varargin{:});
Error in gui (line 44)
    gui_mainfcn(gui_State, varargin{:});
Error in
matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)gui('pushbutton3_Callback',hObject,eventdata,guidata(hObject)) 
Error while evaluating UIControl Callback.

And my code is

function varargout = gui(varargin)
% GUI MATLAB code for gui.fig
%      GUI, by itself, creates a new GUI or raises the existing
%      singleton*.
%
%      H = GUI returns the handle to a new GUI or the handle to
%      the existing singleton*.
%
%      GUI('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in GUI.M with the given input arguments.
%
%      GUI('Property','Value',...) creates a new GUI or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before gui_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to gui_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 gui
% Last Modified by GUIDE v2.5 23-Feb-2019 14:48:40
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @gui_OpeningFcn, ...
                   'gui_OutputFcn',  @gui_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 gui is made visible.
function gui_OpeningFcn(hObject, ~, 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 gui (see VARARGIN)
% Choose default command line output for gui
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes gui wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = gui_OutputFcn(~, ~, 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(~, ~, 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'},'choose file');
global img_1;
if (filename ~= 0)
    img_1 = strcat(pathname,filename);
    axes(handles.axes1)
    imshow(img_1)
end
% now second image 
% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(~, ~, 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)
[filename, pathname] = uigetfile({'*.jpg'},'choose file');
global img_2;
if (filename ~= 0)
    img_2 = strcat(pathname,filename);
    axes(handles.axes2)
    imshow(img_2)
end
% --- Executes on button press in pushbutton3.
function pushbutton3_Callback(~, ~, 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)
% --- Executes during object creation, after setting all properties.
global img_1;
global img_2;
         image_rgb1 = imread(img_1);
         image_lab1 = rgb2lab(image_rgb1);
         image_lab1 = im2double(image_lab1);
         
         w = size(image_lab1,2);
         h = size(image_lab1,2);
         
         l11 = image_lab1(:,:,1); %red
         a11 = image_lab1(:,:,2); %green
         b11 = image_lab1(:,:,3); %blue
         
         image_rgb2 = imread(img_2);
         image_rgb2 = imresize(image_rgb2,[w h]);
          image_lab2 = rgb2lab(image_rgb2);
          image_lab2 = im2double(image_lab2);
          
           l22 = image_lab2(:,:,1); %red
         a22 = image_lab2(:,:,2); %green
         b22 = image_lab2(:,:,3); %blue
         
         DA = 0;
         DE = 0;
         DC = 0;
         for k = 1:w
         for k = 1:h
             
             l1 = l11(k,1i);
             l2 = l22(k,1i);
             
             a1 = a11(k,1i);
             a2 = a22(k,1i);
             
             b1 = b11(k,1i);
             b2 = b22(k,1i);
             
             C1 = sqrt( (a1*a1) + (b1*b1) );
             C2 = sqrt( (a1*a1) + (b1*b1) );
             
             DC = C1 - c2 ;
             
             Dl = l1 - l2;
             Da = a1 - a2;
             Db = b1 - b2;
             
             DH = sqrt((Da * Da) + (Db * Db) - (Dc * DC));
             
             if( l1 < l6)
              SL = 0.511 ;
             end
             
             SC = ((0.0638 * c1)/ (1+0.0131*c1)) + 0.638;
             
             H1 = atan2(b1,a1);
             
             if((H1 >= 164 ) && ( H1 <= 345 ))
                 T = 0.56 + abs((0.2 * cos(H1+168)));
             else
                 T = 0.36 + abs((0.4 * cos(H1+35)));
             end
               
             F = sqrt((c1*c1*c1*c1)/(c1*c1*c1*c1)+1900);
             
             SH = SC * (F * T + 1 - F);
             
             DE = sqrt( ( (Dl/SL) * (Dl/SL) + (DC/SC) * (DC/SC) + (DH/SH) * (DH/SH) ) );
                 
             DA = DA + DE;
             
         end
         end
         
         e=w*h;
         DA=DA/e;
          
         distance = strcat('The distance : ', num2str(DA));
         set(handles.text2,'string',distance);
function pushbutton3_CreateFcn(~, ~, ~)
% hObject    handle to pushbutton3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

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Geoff Hayes 2019-3-3

Priti - it isn't clear which line of code is generating the error message. Is it the line of code that reads the image - with imread - using the global variable img_1 or the line that reads the image using global variable img_2? Perhaps one or both of these isn't set when you press the third push button. Please provide more details.

You can avoid using global variables and use the handles structure (which is accessible b all callbacks) instead. See Store or retrieve UI data for details.

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Answer 1

Walter Roberson 2019-3-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/446923-getting-error-in-gui#answer_363533

Your code in pushbutton3_Callback does not protect against the cases that img_1 or img_2 are empty or do not name a recognized file.

Your code in pushbutton1_Callback and pushbutton2_Callback should be using fullfile() instead of strcat()

If you are using R2014a or earlier, rgb2lab() does not exist.

Your code in pushbutton3_Callback does not protect against the case that img_1 names a grayscale or pseudocolor image, so the third dimension might not exist for it.