MATLAB: How to save image using one pushbutton

guideImage Processing Toolboxpushbutton

i add noise in image at axes2, and then i want to save the image.can anyone help me?here is my code that i try
function checkbox1_Callback(hObject, eventdata, handles)
applyNoise(handles);
function applyNoise(handles)
if isfield(handles,'imgData')
 imgData = handles.imgData;
 noiseStr = '';
   if get(handles.checkbox1,'Value')
      noiseStr = 'Salt & pepper';
      JData = imnoise(imgData,'salt & pepper',0.3);
   end
   if get(handles.checkbox2,'Value')
      if ~isempty(noiseStr)
          noiseStr = [noiseStr ', '];
      end
      noiseStr = [noiseStr 'Gaussian'];
      JData = imnoise(imgData,'gaussian',0.1,0.1);
   end
    if get(handles.checkbox3,'Value')
      if ~isempty(noiseStr)
          noiseStr = [noiseStr ', '];
      end
      noiseStr = [noiseStr 'localvar'];
      JData = imnoise(imgData,'localvar',0.05*rand(size(imgData)));
    end
   if get(handles.checkbox4,'Value')
      if ~isempty(noiseStr)
          noiseStr = [noiseStr ', '];
      end
      noiseStr = [noiseStr 'poisson'];
      JData = imnoise(imgData,'poisson');
   end
   if get(handles.checkbox5,'Value')
      if ~isempty(noiseStr)
          noiseStr = [noiseStr ', '];
      end
      noiseStr = [noiseStr 'speckle'];
      JData = imnoise(imgData,'speckle', 0.3);
   end
     axes(handles.axes2);
     %imshow(imgData);
     imshow(JData)
     title(['Noise type: ' noiseStr,]);
    handles.JData = imgData;
    %save the handles data
    %guidata(hObject,handles);
end
if isfield(handles,'JData')
    imgData = handles.JData;
end
and here my save button
function pushbutton2_Callback(hObject, eventdata, handles)
if isfield(handles,'JData')
imgData = handles.JData;
%if isfield(handles,'imgData')
%imgData = handles.imgData;
[Save,savename] = uiputfile('*.jpg','save this file')
fname=fullfile(savename,Save);
imwrite(imgData,fname);  % where F is your image
end

Best Answer

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.
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