Select an image folder in GUI

Hi,

I have problem to select an image folder in GUI. My GUI functions like that, when I push the selectSourceButton button I select the folder. Later, when I push the startButton the program should read all the files.

It seems my problem is how to transfer the Source folder information between the functions. I hope anyone can help me.

Thank you.

function selectSourceButton_Callback(hObject, eventdata, handles)
% hObject    handle to selectSourceButton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
handles.output = hObject; 
sourceFolder = uigetdir();
textLabel = sprintf('%s', sourceFolder);
set(handles.sourceFolderEdit, 'string', textLabel);
myFolder = get(handles.sourceFolderEdit, 'String'); 
guidata(hObject, handles);

function startButton_Callback(hObject, eventdata, handles)
handles.output = hObject;
if ~isdir(myFolder)
  errorMessage = sprintf('Error: The following folder does not exist:\n%s', myFolder);
  uiwait(warndlg(errorMessage));
  return;
end

filePattern = fullfile(myFolder, '*.jpg');
jpegFiles = dir(filePattern);

for k = 1:length(jpegFiles)
      baseFileName = jpegFiles(k).name;
      fullFileName = fullfile(myFolder, baseFileName);
      fprintf(1, 'Now reading %s\n', fullFileName);
      imageArray = imread(fullFileName);
  end

Answer 1

[Image Analyst]

See the FAQ: http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F

I'd just use one folder - not myFolder and not sourceFolder. Just pick one and attach it to handles.

function selectSourceButton_Callback(hObject, eventdata, handles)
  sourceFolder = uigetdir();
  set(handles.sourceFolderEdit, 'string', sourceFolder );
  handles.sourceFolder = sourceFolder;
  guidata(hObject, handles);

function startButton_Callback(hObject, eventdata, handles)
if ~isdir(handles.sourceFolder)
  errorMessage = sprintf('Error: The following folder does not exist:\n%s', handles.sourceFolder);
  uiwait(warndlg(errorMessage));
  return;
end

filePattern = fullfile(handles.sourceFolder, '*.jpg');
jpegFiles = dir(filePattern);

for k = 1:length(jpegFiles)
      baseFileName = jpegFiles(k).name;
      fullFileName = fullfile(handles.sourceFolder, baseFileName);
      fprintf(1, 'Now reading %s\n', fullFileName);
      imageArray = imread(fullFileName);
end

[as hz]

Thanks

[geo i]

Could anyone tell me why I get this error?

Reference to non-existent field 'sourceFolderEdit'.

[Image Analyst]

They had an edit text box on their GUI called sourceFolderEdit - in other words, the "tag" property of the text edit box was sourceFolderEdit. If you want to do the same thing, you'll have to either call your edit box that, or replace the code with the actual name of the edit text box that you're using.

[Ishwarya Subramanian]

I'm using the above code..but i didnt get the images in sequential order. Can anyone please solve this

[Image Analyst]

Not sure what sorting order you want. Perhaps it's this: http://blogs.mathworks.com/pick/2014/12/05/natural-order-sorting/