How to use image with two push buttons in matlab guide?

Question

everyone have problem programing in guide, so in guide i opened image with file selector in this i use pushbutton1, so now i want so save this image into database using pushbutton2, always got error on : Undefined function or variable 'image_str'.

Error in pildymas>pushbutton2_Callback (line 291) nuotrauka = {[1],'.jpg',image_str,[42],[42]};

add code below:

function pushbutton1_Callback(hObject, eventdata, handles)
[filename, pathname] = uigetfile({'*.jpg','*.bmp'},'File Selector');
image1 = imread(strcat(pathname, filename));
axes(handles.axes1);
I = imshow(image1);
I = I(:)'; % transpose it
I = im2uint8(I); % convert it to uint8
s = dec2hex(I, 2)'; % convert it to hexcode
image_str = s(:)'; 
handles.image_str=0;
guidata(hObject,handles)
clear I s
 % save the updated handles object
 guidata(hObject,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)
% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
%Use handles structure to recall the selected file
conn = database('baze', 'root', 'root', 'Vendor', 'MYSQL', 'Server', 'localhost', 'PortNumber', 3306);
setdbprefs('DataReturnFormat','cellarray');
vardas = get(handles.edit1, 'string');
pavarde = get(handles.edit2, 'string');
laipsnis = get(handles.edit3, 'string');
pareigos = get(handles.edit4, 'string');
telefonas = get(handles.edit5, 'string');
marke = get(handles.edit6, 'string');
numeris = get(handles.edit7, 'string');
tarnyba = get(handles.edit8, 'string');
handles.image_str=0;
nuotrauka = {[1],'.jpg',image_str,[42],[42]}; 
guidata(hObject, handles);
exdata = {vardas,pavarde,laipsnis,pareigos,telefonas,marke,numeris,tarnyba,nuotrauka};
fastinsert(conn, 'info', {'vardas','pavarde','laipsnis','pareigos','telefonas','marke','numeris','tarnyba','nuotrauka'},exdata)
close(conn);

thanks in advise.

Please read my answer carefully first add `handles.image_str=0` to `OpeningFcn` but you add this to `pushbutton11_callback` function -and next step `handles.img_str=s(:)'` and next `nuotrauka = {[1],'.jpg',handles.image_str,[42],[42]};` — Saeed Masoomi, May 27 '17 at 18:23
now i little change code look at this: https://stackoverflow.com/questions/44215492/how-to-save-image-in-database-matlab — Gytis Raudonius, May 28 '17 at 07:40
your previous error is solved? are you get concept? if your problem is solved,then apply answer — Saeed Masoomi, May 28 '17 at 15:31

Saeed Masoomi · Answer 1 · 2017-05-23T16:52:12.617

0

Variables in each function is local, this means that image_str only define in pushbutton1_callback function and not define in pushbutton2_callback so you must define this variable in handles structure

check this QA for much information

for gentle answer you can try following steps:

define variable that shared in whole functions

define a variable in OpeningFcn like below code

handles.image_str=0;
guidata(hObject,handles)

save image in pushbutton1_callback function

save image in handles.img_str like below

handles.image_str=0;
guidata(hObject,handles)

Use handles.image_str

now you can use handles.image_str every where you like

edited May 23 '17 at 16:52

answered May 23 '17 at 16:44

Saeed Masoomi

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Undefined function or variable 'image_str'. Error in pildymas>pushbutton2_Callback (line 291) nuotrauka = {[1],'.jpg',image_str,[42],[42]}; – Gytis Raudonius May 28 '17 at 07:37

How to use image with two push buttons in matlab guide?

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