Showing error in Matlab GUI interface code

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 03-May-2021 12:42:10

% 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, 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 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(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)

[filename,path]=uigetfile('*.*', 'Select an image');

filename=strcat(path,filename);

I=imresize(imread(filename),[256,256]);

axes(handles.axes2);

imshow(I);

handles.I = I;

guidata(hObject, handles);

% --- Executes on selection change in popupmenu1.

function popupmenu1_Callback(hObject, eventdata, handles)

% hObject handle to popupmenu1 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns popupmenu1 contents as cell array

% contents{get(hObject,'Value')} returns selected item from popupmenu1

% --- Executes during object creation, after setting all properties.

function popupmenu1_CreateFcn(hObject, eventdata, handles)

% hObject handle to popupmenu1 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows.

% See ISPC and COMPUTER.

if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor','white');

end

% --- If Enable == 'on', executes on mouse press in 5 pixel border.

% --- Otherwise, executes on mouse press in 5 pixel border or over popupmenu1.

function popupmenu1_ButtonDownFcn(hObject, eventdata, handles)

% hObject handle to popupmenu1 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% --- Executes on selection change in popupmenu3.

function popupmenu3_Callback(hObject, eventdata, handles)

% hObject handle to popupmenu3 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns popupmenu3 contents as cell array

% contents{get(hObject,'Value')} returns selected item from popupmenu3

% --- Executes during object creation, after setting all properties.

function popupmenu3_CreateFcn(hObject, eventdata, handles)

% hObject handle to popupmenu3 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows.

% See ISPC and COMPUTER.

if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor','white');

end

% --- Executes on button press in rgbtogray.

function rgbtogray_Callback(hObject, eventdata, handles)

% hObject handle to rgbtogray (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

f=handles.I;

f= rgb2gray(f);

axes(handles.axes3);

imshow(f);

handles.f = f;

guidata(hObject, handles);

% --- Executes on selection change in Types_of_noise.

function Types_of_noise_Callback(hObject, eventdata, handles)

% hObject handle to Types_of_noise (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns Types_of_noise contents as cell array

% contents{get(hObject,'Value')} returns selected item from Types_of_noise

h=handles.f;

contents = cellstr(get(hObject,'String'));

e=contents{get(hObject,'Value')};

if(strcmp(e,'salt and pepper noise'))

J = imnoise(h,'salt & pepper', 0.2);

axes(handles.axes4);

imshow(J);

elseif (strcmp(e,'Gaussian noise'))

J=imnoise(h,'gaussian',0,0.0125);

axes(handles.axes4);

imshow(J);

elseif (strcmp(e,'Poisson noise'))

J = imnoise(h,'poisson');

axes(handles.axes4);

imshow(J);

else

J = imnoise(h,'speckle');

axes(handles.axes4);

imshow(J);

end

handles.J = J;

guidata(hObject, handles);

% --- Executes during object creation, after setting all properties.

function Types_of_noise_CreateFcn(hObject, eventdata, handles)

% hObject handle to Types_of_noise (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows.

% See ISPC and COMPUTER.

if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor','white');

end

% --- Executes on selection change in Denoising_filters.

function Denoising_filters_Callback(hObject, eventdata, handles)

% hObject handle to Denoising_filters (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns Denoising_filters contents as cell array

% contents{get(hObject,'Value')} returns selected item from Denoising_filters

c=handles.I;

u=handles.J;

contents = cellstr(get(hObject,'String'));

p=contents{get(hObject,'Value')};

if(strcmp(p,'Wiener filter'))

u=uint8(u);

[K,NOISE]=wiener2(u,[5,5]);

K=wiener2(u,[5 5]);

K=uint8(K);

axes(handles.axes5);

imshow(K);

handles.K = K;

guidata(hObject, handles);

elseif(strcmp(p,'Gaussian filter'))

u=uint8(u);

sigma=0.5;

kernel=zeros(5,5);

W=0;

for i=1:5

for j=1:5

dis=(i-3)^2+(j-3)^2;

kernel(i,j)=exp(-1*dis/2*sigma*sigma);

W=W+kernel(i,j);

end

end

kernel=kernel/W;

[m,n]=size(u);

output=zeros(m,n);

t=padarray(u,[2,2]);

for i=1:m

for j=1:n

temp=t(i:i+4,j:j+4);

temp=double(temp);

conv=temp.*kernel;

output(i,j)=sum(conv(:));

end

end

output=uint8(output);

axes(handles.axes5);

imshow(output);

handles.output = output;

guidata(hObject, handles);

elseif(strcmp(p,'Vector median filter'))

a1=c(:,:,1);

b1=u(:,:,1);

b1=double(b1);

a2=c(:,:,2);

b2=u(:,:,2);

b2=double(b2);

a3=c(:,:,3);

b3=u(:,:,3);

b3=double(b3);

a1=double(a1);

a2=double(a2);

a3=double(a3);

z1=zeros(256,256);

z2=zeros(256,256);

z3=zeros(256,256);

for i=2:255

for j=2:255

s1=reshape(b1(i-1:i+1,j-1:j+1),1,9);

s2=reshape(b2(i-1:i+1,j-1:j+1),1,9);

s3=reshape(b3(i-1:i+1,j-1:j+1),1,9);

for z=1:9

su=0;

for r=1:9

if (z~=1)

su=su+sqrt((s1(z)-s1(r)).^2+(s2(z)-s2(r)).^2+(s3(z)-s3(r)).^2);

end

end

m(z)=su;

end

q=min(m(:));

p=find(m(:)==q);

p1=s1(p(1));

p2=s2(p(1));

p3=s3(p(1));

z1(i,j)=p1;

z2(i,j)=p2;

z3(i,j)=p3;

end

end

z1=uint8(z1);

z2=uint8(z2);

z3=uint8(z3);

Y0=cat(3,z1,z2,z3);

Y0=uint8(Y0);

axes(handles.axes5);

imshow(Y0);

handles.Y0 = Y0;

guidata(hObject, handles);

else

u=uint8(u);

avg = fspecial('average');

avg1=filter2(avg,u);

axes(handles.axes5);

avg1=uint8(avg1);

imshow(avg1);

handles.avg1 = avg1;

guidata(hObject, handles);

end

% --- Executes during object creation, after setting all properties.

function Denoising_filters_CreateFcn(hObject, eventdata, handles)

% hObject handle to Denoising_filters (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows.

% See ISPC and COMPUTER.

if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor','white');

end

function sigma_value_Callback(hObject, eventdata, handles)

% hObject handle to sigma_value (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of sigma_value as text

% str2double(get(hObject,'String')) returns contents of sigma_value as a double

% --- Executes during object creation, after setting all properties.

function sigma_value_CreateFcn(hObject, eventdata, handles)

% hObject handle to sigma_value (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.

% See ISPC and COMPUTER.

if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor','white');

end

% --- Executes on button press in Mean_square_error.

function Mean_square_error_Callback(hObject, eventdata, handles)

% hObject handle to Mean_square_error (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% --- Executes on button press in Peak_signal_to_noise_ratio.

function Peak_signal_to_noise_ratio_Callback(hObject, eventdata, handles)

% hObject handle to Peak_signal_to_noise_ratio (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

function edit5_Callback(hObject, eventdata, handles)

% hObject handle to edit5 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit5 as text

% str2double(get(hObject,'String')) returns contents of edit5 as a double

% --- Executes during object creation, after setting all properties.

function edit5_CreateFcn(hObject, eventdata, handles)

% hObject handle to edit5 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.

% See ISPC and COMPUTER.

if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor','white');

end

function edit8_Callback(hObject, eventdata, handles)

% hObject handle to edit8 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit8 as text

% str2double(get(hObject,'String')) returns contents of edit8 as a double

% --- Executes during object creation, after setting all properties.

function edit8_CreateFcn(hObject, eventdata, handles)

% hObject handle to edit8 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.

% See ISPC and COMPUTER.

if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor','white');

end

% --- Executes on selection change in MSE.

function MSE_Callback(hObject, eventdata, handles)

% hObject handle to MSE (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns MSE contents as cell array

% contents{get(hObject,'Value')} returns selected item from MSE

f=handles.f;

contents = cellstr(get(hObject,'String'));

p1=contents{get(hObject,'Value')};

if(strcmp(p1,'wiener filter'))

K=handles.K;

v1=0;

for i=1:256

for j=1:256

v1=v1+mean(K(i,j)-f(i,j))^.2;

end

end

MSE=v1/(256*256);

set(handles.edit5,'string',MSE);

PSNR=10*log10(255^2*254^2/v1);

set(handles.edit8,'string',PSNR);

elseif (strcmp(p1,'gaussian filter'))

output=handles.output;

v2=0;

for i=1:256

for j=1:256

v2=v2+mean(output(i,j)-f(i,j))^.2;

end

end

MSE=v2/(256*256);

set(handles.edit5,'string',MSE);

PSNR=10*log10(255^2*254^2/v2);

set(handles.edit8,'string',PSNR);

elseif (strcmp(p1,'vector median filter'))

Y0=handles.Y0;

v3=0;

for i=1:256

for j=1:256

v3=v3+mean(Y0(i,j)-f(i,j))^.2;

end

end

MSE=v3/(256*256);

set(handles.edit5,'string',MSE);

PSNR=10*log10(255^2*254^2/v3);

set(handles.edit8,'string',PSNR);

else

avg1=handles.avg1;

v4=0;

for i=1:256

for j=1:256

v4=v4+mean(avg1(i,j)-f(i,j))^.2;

end

end

MSE=v4/(256*256);

set(handles.edit5,'string',MSE);

PSNR=10*log10(255^2*254^2/v4);

set(handles.edit8,'string',PSNR);

end

% --- Executes during object creation, after setting all properties.

function MSE_CreateFcn(hObject, eventdata, handles)

% hObject handle to MSE (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows.

% See ISPC and COMPUTER.

if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor','white');

end

% --- Executes on selection change in PSNR.

function PSNR_Callback(hObject, eventdata, handles)

% hObject handle to PSNR (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns PSNR contents as cell array

% contents{get(hObject,'Value')} returns selected item from PSNR

% --- Executes during object creation, after setting all properties.

function PSNR_CreateFcn(hObject, eventdata, handles)

% hObject handle to PSNR (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows.

% See ISPC and COMPUTER.

if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor','white');

end

This is a code for image denoising techniques,I am faced few errors in it .Attaching the error below ,Please help

Reference to non-existent field 'avg1'.

Error in gui>MSE_Callback (line 466)

avg1=handles.avg1;

Error in gui_mainfcn (line 95)

feval(varargin{:});

Error in gui (line 42)

gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)gui('MSE_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uicontrol Callback

[Adam Danz]

Help others help you. Make it very easy for people to help you by formatting your code.

https://www.mathworks.com/matlabcentral/help/rtc

[Adam Danz]

The error message states that this line is causing the problem

    avg1=handles.avg1;

and the problem is that av1 does not exist.