Howto updated/manipulated image between the callbacks

Hi,

I have several push buttons that performs image analysis (e.g., load an image, convert to gray scale). I wish to share the updated/manipulated image between the callbacks but I get an error.

Therefore, how can I update the image and share it between the callbacks?

Code for example:

function loadImageButton_Callback(hObject, eventdata, handles)
% hObject    handle to loadImageButton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

I = imread('D:\Image\tele.jpg');
axes(handles.imageAxes);
imshow(I); 
guidata(hObject, handles);

function convertGSbutton_Callback(hObject, eventdata, handles)
% hObject    handle to convertGSbutton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

I = rgb2gray(I);
axes(handles.imageAxes);
imshow(I);
guidata(hObject, handles);

Thanks

Answer 1

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.3F

[Lluis Roca]

Thanks.

I used the SETAPPDATA and GETAPPDATA.

What would be my 'yourVariable' in my case?

[Walter Roberson]

The data you want shared. "I" in this case.