MATLAB: How to combine multiple noise type using checkbox. for example double noise and triple noise and apply it to the image when click the checkbox

checkboximage processingImage Processing Toolbox

I have 5 checkbox that represent 5 types of noise which is salt&pepper noise,localvar noise,gaussian noise, speckle noise and poisson noise. i want the user to be able to select multiple noise which is double noise or triple noise by clicking the checkbox and the noises will apply to the image.and after user click the checkboxes at the top of the image, it will show title of the combine noises.for example, title('poisson noise and speckle noise'). and also when the user uncheck the checkbox the noise is dissapear from the image. So here my current coding:

function pushbutton1_Callback(hObject, eventdata, handles)
[filename, pathname] = uigetfile({'*.jpg';'*.tif';'*.png'},'Select File');
if isequal(filename,0)|| isequal(pathname,0) 
     uiwait(msgbox ('User pressed cancel','please select an image')  )
     hold on;
else
    uiwait(msgbox('User selected image sucessfully','sucess'));
    hold off;
    img = imread([pathname filename]);
    img = img(:,:,1);
    axes(handles.axes1); 
    imshow(img);
    title('original image');
      %update the handles structure with the image
      handles.imgData = img;
      %save the handles data
      guidata(hObject,handles)
  end
%check to make sure that the image data exists in handles
if isfield(handles,'imgData')
    %grab the image data from handles





    I = handles.imgData;
    axes(handles.axes2);
    imshow(img);
end
% 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)





% --- Executes on button press in checkbox1.
function checkbox1_Callback(hObject, eventdata, handles)
isChecked = get(hObject,'Value');
if isChecked==1
if isfield(handles,'imgData')
    %grab the image data from handles
    I = handles.imgData;
    J = imnoise(I,'salt & pepper',0.3);
    axes(handles.axes2);
    imshow(J);
    title('Noise type: Salt & pepper');
end
guidata(hObject, handles)
end   
% hObject    handle to checkbox1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of checkbox1
% --- Executes on button press in checkbox2.
function checkbox2_Callback(hObject, eventdata, handles)
isChecked = get(hObject,'Value');
if isChecked==1
if isfield(handles,'imgData')
    %grab the image data from handles
    I = handles.imgData;
    M = imnoise(I,'gaussian',0.1,0.1);
    axes(handles.axes2);
    imshow(M);
    title('Noise type: Gaussian noise');
end
guidata(hObject, handles)
end   
% hObject    handle to checkbox2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of checkbox2
% --- Executes on button press in checkbox3.
function checkbox3_Callback(hObject, eventdata, handles)
isChecked = get(hObject,'Value');
if isChecked==1
if isfield(handles,'imgData')
    %grab the image data from handles
    I = handles.imgData;
    N=imnoise(I,'localvar',0.05*rand(size(I)));
    axes(handles.axes2);
    imshow(N);
    title('Noise type: Localvar noise');
end
guidata(hObject, handles)
end   
% hObject    handle to checkbox3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of checkbox3
% --- Executes on button press in checkbox4.
function checkbox4_Callback(hObject, eventdata, handles)
isChecked = get(hObject,'Value');
if isChecked==1
if isfield(handles,'imgData')
    %grab the image data from handles
    I = handles.imgData;
    P=imnoise(I,'poisson');
    axes(handles.axes2);
    imshow(P);
    title('Noise type: Poisson noise');
end
guidata(hObject, handles)
end   
% hObject    handle to checkbox4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of checkbox4
% --- Executes on button press in checkbox5.
function checkbox5_Callback(hObject, eventdata, handles)
isChecked = get(hObject,'Value');
if isChecked==1
if isfield(handles,'imgData')
    %grab the image data from handles
    I = handles.imgData;
    Q = imnoise(I,'speckle', 0.3);
    axes(handles.axes2);
    imshow(Q);
    title('Noise type: Speckle noise');
end
guidata(hObject, handles)
end   
% hObject    handle to checkbox5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of checkbox5

Best Answer

amira - I would create one function that all of your checkbox callbacks would call whenever the checkbox is checked or unchecked. This single function would then apply (or remove) the noise depending upon which checkbox is checked. For example, your first and second checkboxes would be replaced with just

function checkbox1_Callback(hObject, eventdata, handles)
applyNoise(handles); 
function checkbox2_Callback(hObject, eventdata, handles)
applyNoise(handles);

The applyNoise function would then

function applyNoise(handles)
if isfield(handles,'imgData')
   imgData = handles.imgData;
   noiseStr = '';
     if get(handles.checkbox1,'Value')
        noiseStr = 'Salt & pepper';
        imgData = imnoise(imgData,'salt & pepper',0.3);
     end
     if get(handles.checkbox2,'Value')
        if ~isempty(noiseStr)
            noiseStr = [noiseStr ', '];
        end
        noiseStr = [noiseStr 'Gaussian'];
        imgData = imnoise(imgData,'gaussian',0.1,0.1);
     end
     axes(handles.axes2);
     imshow(imgData);
     title(['Noise type: ' noiseStr]);
end

The above function gets the initial image and first applies the Salt and Pepper noise followed by the Gaussian noise (if either has been selected) before being displayed in axes2. If neither has been selected, then there is no noise and so the original image is displayed in axes2.

You can do the same for the remaining three noise types.

Related Solutions

MATLAB: How to save image using one pushbutton

Change the declaration to return handles, like this

function handles = applyNoise(handles)

otherwise the changes you make to handles (like adding a field handles.JData) will never be seen by your other functions.

MATLAB: How to uncheck checkbox

Hello amira, you could add another condition to your callback, like this:

fucntion checkbox1_callback(hObject,eventdata,handles)
if hObject.Value==1 % This is like your isChecked==1
    if isfield(handles,'imgData')
    I=handles.imgData;
    J=imnoise(I,'salt & pepper',0.3);
    imshow(J);
    title('Noise type: Salt and pepper');
elseif hObject.Value==0
    if isfield(handles,'imgData')
    I=handles.imgData;
    imshow(I)
    title('No noise')
end
guidata(hObject,handles)
end

Note that I have changed isChecked to hObject.Value because isChecked is a variable that does not exist when you call the callback, and hObject.Value or handles.checkbox1.Value (which are equivalent if you are inside the callback function of checkbox1) they give you value 1 if it's checked and 0 if it's not checked.

Now if you want to apply different types of noise then you need to create for example a second checkbox, and let's suppose it's tag is checkbox2, then you could do like this:

fucntion checkbox2_callback(hObject,eventdata,handles)
if hObject.Value==1
    if isfield(handles,'imgData')
    I=handles.imgData;
    J=imnoise(I,'my_noise',0.3);
    imshow(J);
    title('Noise type: mynoise');
elseif hObject.Value==0
    if isfield(handles,'imgData')
    I=handles.imgData;
    imshow(I)
    title('No noise')
end
guidata(hObject,handles)
end

Now the problem is that if you want to apply only one noise at a time and not allow 2 noises to be together you could do like this:

fucntion checkbox1_callback(hObject,eventdata,handles)
if hObject.Value==1 && handles.checkbox2.Value==0
    if isfield(handles,'imgData')
    I=handles.imgData;
    J=imnoise(I,'salt & pepper',0.3);
    imshow(J);
    title('Noise type: Salt and pepper');
elseif hObject.Value==0 && handles.checkbox2==0
    if isfield(handles,'imgData')
    I=handles.imgData;
    imshow(I)
    title('No noise')
end
guidata(hObject,handles)
end
fucntion checkbox2_callback(hObject,eventdata,handles)
if hObject.Value==1 && handles.checkbox1.Value==0
    if isfield(handles,'imgData')
    I=handles.imgData;
    J=imnoise(I,'my_noise',0.3);
    imshow(J);
    title('Noise type: mynoise');
elseif hObject.Value==0 && handles.checkbox1.Value==0
    if isfield(handles,'imgData')
    I=handles.imgData;
    imshow(I)
    title('No noise')
end
guidata(hObject,handles)
end

Like this you can only apply one noise at a time and also the checkboxes won't apply noise to an image that has allready a noise applied to it. If you want to add warning dialogs to warn the user that he is applying 2 noises then you could simply write them like this:

fucntion checkbox1_callback(hObject,eventdata,handles)
if hObject.Value==1 && handles.checkbox2.Value==0
    if isfield(handles,'imgData')
    I=handles.imgData;
    J=imnoise(I,'salt & pepper',0.3);
    imshow(J);
    title('Noise type: Salt and pepper');
elseif hObject.Value==0 && handles.checkbox2==0
    if isfield(handles,'imgData')
    I=handles.imgData;
    imshow(I)
    title('No noise')
elseif hObject.Value==1 && handles.checkbox2==1
    warndlg('Only one noise may be applied', 'Invalid choice warning');
end
guidata(hObject,handles)
end
fucntion checkbox2_callback(hObject,eventdata,handles)
if hObject.Value==1 && handles.checkbox1.Value==0
    if isfield(handles,'imgData')
    I=handles.imgData;
    J=imnoise(I,'my_noise',0.3);
    imshow(J);
    title('Noise type: mynoise');
elseif hObject.Value==0 && handles.checkbox1.Value==0
    if isfield(handles,'imgData')
    I=handles.imgData;
    imshow(I)
    title('No noise')
elseif hObject.Value==1 && handles.checkbox1==1
    warndlg('Only one noise may be applied', 'Invalid choice warning');
end
guidata(hObject,handles)
end

Hope this answer helped you get what you were looking for.

Best Answer

Related Solutions

MATLAB: How to save image using one pushbutton

MATLAB: How to uncheck checkbox

Related Question