why i can't show image in axes in serial callback

i need your help! i'm a newbie

i can't show image in axes by: axes(handles.axes1); imshow('image.jpg');

my Guide have 2 axes and 2 pushbutton.

my code:

 function pushbutton1_Callback(hObject, eventdata, handles)
 % 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)
 global s
 s = serial('COM1','Baudrate',9600,'DataBits',8,'Parity','none','StopBits',1);
 s.BytesAvailableFcnCount = 1; 
 s.Timeout = 1; 
 s.BytesAvailableFcnMode = 'byte';
 s.BytesAvailableFcn = @Serial_Callback;
    try
        fopen(s);
    catch err;
        if (strcmp(err.identifier,'MATLAB:serial:fopen:opfailed'))
            msgbox('Open COMport fail!!! Please try again!','Error','error');
        end
    end

 % --- Executes on button press in pushbutton2.

 function Serial_Callback(hObject, eventdata, handles)
 % hObject    handle to pushbutton2 (see GCBO)
 %  eventdata  reserved - to be defined in a future version of MATLAB
 % handles    structure with handles and user data (see GUIDATA)
 global video hinh s I J K a S P;
 video = videoinput('winvideo',2); 
 hinh = getsnapshot(video);
 imwrite(hinh,'anh.jpg');
 a = imread('anh.jpg'); 
 axes(handles.axes1); 
 imshow(a);
 J = rgb2gray(a); 
 J = imadjust(J);
 K = im2bw(J,0.7); 
 K = imfill(K,'hole');
 K = bwareaopen(K,2500);
 axes(handles.axes2); 
 imshow(K);

 function pushbutton3_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global s;
fclose(s);
close;

Error: Error using feval Undefined function 'figure1_CreateFcn' for input arguments of type 'double'.

Error in gui_mainfcn (line 96) feval(varargin{:});

Error in doan (line 42) gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)doan('figure1_CreateFcn',hObject,eventdata,guidata(hObject))

Error using struct2handle Error while evaluating figure CreateFcn

Error using doan>pushbutton2_Callback (line 107) Not enough input arguments.

Error in instrcb (line 36) feval(val{1}, obj, eventStruct, val{2:end});

Warning: The BytesAvailableFcn is being disabled. To enable the callback property either connect to the hardware with FOPEN or set the BytesAvailableFcn property.

Error using edit (line 66) Undefined function or variable 'hObject'.

Error in helpUtils.errorDocCallback (line 23) if ~edit(editTopic)

Answer 1

[Jan]

"Undefined function 'figure1_CreateFcn'" sounds like you have renamed the GUI after the creation.

"pushbutton2_Callback (line 107) Not enough input arguments." is a serious problem, but without seeing the code it is not possible to give an advice.

 Error using edit (line 66) Undefined function or variable 'hObject'.
 Error in helpUtils.errorDocCallback (line 23) if ~edit(editTopic)

Are you sure that you want to open this is Matlab's editor?

 Warning: The BytesAvailableFcn is being disabled.

There is a severe problem with the serial object, when the BytesAvailableFcn does not work. Note that the callback of the seriabl object gets this object as first input. Using a callback of the GUI is not useful and the 3rd input "handles" was not defined.

Summary: This shown and not shown parts of the code contain many problems. Start with focussing one problem after the other.

[amh limh]

Line 107: axes(handles.axes1)

How to define handles in serial callback. Help me plz

[Walter Roberson]

You have to pass the handles object yourself. Safer would be to pass the figure handle and use guidata to grab the current handle structure.