How to save image in database

hi, i try insert image in database together with sting information about image but always got error. Maybe you know how to solve that. Error: Error using cell2mat (line 46) All contents of the input cell array must be of the same data type.

Error in pildymas>pushbutton2_Callback (line 301) exdata = {vardas,pavarde,laipsnis,pareigos,telefonas,marke,numeris,tarnyba, cell2mat(nuotrauka)};

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

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

Error in @(hObject,eventdata)pildymas('pushbutton2_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uicontrol Callback

% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
[filename, pathname] = uigetfile({'*.jpg','*.bmp'},'File Selector');
image1 = imread(strcat(pathname, filename));
axes(handles.axes1);
I = imshow(image1);

guidata(hObject,handles)
 % 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');
I = handles.I(:)'; % transpose it
I = im2uint8(I); % convert it to uint8
s = dec2hex(I, 2)'; % convert it to hexcode
image_str = s(:)'; 
clear I s
nuotrauka = {[1],'.jpg',image_str,[42],[42]}; % define the input data
exdata = {vardas,pavarde,laipsnis,pareigos,telefonas,marke,numeris,tarnyba, cell2mat(nuotrauka)};
fastinsert(conn, 'info', {'vardas','pavarde','laipsnis','pareigos','telefonas','marke','numeris','tarnyba','nuotrauka'},exdata)
guidata(hObject, handles);
close(conn);

thanks in advise

[Selva Karna]

use imwrite or mat save