MATLAB: How do i transfer matrix variable of an image from gui callback function to a another call back function (pushbutton1_Callback —-> pushbutton2_Callback)

Question

function pushbutton1_Callback(hObject, eventdata, handles)
handles.imgin = uigetfile();
guidata(hObject,handles)

i need to transfer loaded image matrix variable to below function

function pushbutton2_Callback(hObject, eventdata, handles)
imgin = guidata(hObject,handles.imgin);

but i fail to get the loaded image matrix from here

Answer 1

Tishan - you don't need to use guidata to access the field of handles that has been update with imgin. Rather than doing

 function pushbutton2_Callback(hObject, eventdata, handles)
 imgin = guidata(hObject,handles.imgin);

just do

 function pushbutton2_Callback(hObject, eventdata, handles)
 if isfield(handles,'imgin') 
     imgin = handles.imgin;
     % rest of code goes here
 end

Try the above and see what happens!