face detection - off button gui not working

Question

Hi, 
i am working a face recognition system for my fyp but first i would like to ensure that the facial feature can be detected.

I have 2 question.
I would like to add the video player into the gui but I am not sure which parts of the part i should amend. I try adding axes(handles.camerAxes) into my code and remove the videoplayer but face error. 

Another question will be the off button. I want to off the videoplayer feature but there is error face.

Please help me as I am really new to matlab.

Thank you in advance.


  function varargout = face_tracking(varargin)
  % FACE_TRACKING MATLAB code for face_tracking.fig
  %      FACE_TRACKING, by itself, creates a new FACE_TRACKING or raises the existing
  %      singleton*.
  %
  %      H = FACE_TRACKING returns the handle to a new FACE_TRACKING or the handle to
  %      the existing singleton*.
  %
  %      FACE_TRACKING('CALLBACK',hObject,eventData,handles,...) calls the local
  %      function named CALLBACK in FACE_TRACKING.M with the given input arguments.
  %
  %      FACE_TRACKING('Property','Value',...) creates a new FACE_TRACKING or raises the
  %      existing singleton*.  Starting from the left, property value pairs are
  %      applied to the GUI before face_tracking_OpeningFcn gets called.  An
  %      unrecognized property name or invalid value makes property application
  %      stop.  All inputs are passed to face_tracking_OpeningFcn via varargin.
  %
  %      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
  %      instance to run (singleton)".
  %
  % See also: GUIDE, GUIDATA, GUIHANDLES
  
  % Edit the above text to modify the response to help face_tracking
  
  % Last Modified by GUIDE v2.5 28-Jan-2015 00:39:01
  
  % Begin initialization code - DO NOT EDIT
  gui_Singleton = 1;
  gui_State = struct('gui_Name',       mfilename, ...
                     'gui_Singleton',  gui_Singleton, ...
                     'gui_OpeningFcn', @face_tracking_OpeningFcn, ...
                     'gui_OutputFcn',  @face_tracking_OutputFcn, ...
                     'gui_LayoutFcn',  [] , ...
                     'gui_Callback',   []);
  if nargin && ischar(varargin{1})
      gui_State.gui_Callback = str2func(varargin{1});
  end
  
  if nargout
      [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
  else
      gui_mainfcn(gui_State, varargin{:});
  end
  % End initialization code - DO NOT EDIT
  
  
  % --- Executes just before face_tracking is made visible.
  function face_tracking_OpeningFcn(hObject, eventdata, handles, varargin)
  % This function has no output args, see OutputFcn.
  % hObject    handle to figure
  % eventdata  reserved - to be defined in a future version of MATLAB
  % handles    structure with handles and user data (see GUIDATA)
  % varargin   command line arguments to face_tracking (see VARARGIN)
  
  % Choose default command line output for face_tracking
  handles.output = hObject;
  
  % Update handles structure
  guidata(hObject, handles);
  
  % UIWAIT makes face_tracking wait for user response (see UIRESUME)
  % uiwait(handles.figure1);
  
  
  % --- Outputs from this function are returned to the command line.
  function varargout = face_tracking_OutputFcn(hObject, eventdata, handles) 
  % varargout  cell array for returning output args (see VARARGOUT);
  % hObject    handle to figure
  % eventdata  reserved - to be defined in a future version of MATLAB
  % handles    structure with handles and user data (see GUIDATA)
  
  % Get default command line output from handles structure
  varargout{1} = handles.output;
  
  
  % --- Executes when figure1 is resized.
  function figure1_ResizeFcn(hObject, eventdata, handles)
  % hObject    handle to figure1 (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 cameraon.
  function cameraon_Callback(hObject, eventdata, handles)
  % hObject    handle to cameraon (see GCBO)
  % eventdata  reserved - to be defined in a future version of MATLAB
  % handles    structure with handles and user data (see GUIDATA)
  faceDetector = vision.CascadeObjectDetector();
  
  obj = imaq.VideoDevice('winvideo', 1, 'MJPG_320x240','ROI',[1 1 320 240]);
  handles.vid=obj;
  
  videoFrame = step(obj);
  
  %Get a bounding box around the face
  bbox            = step(faceDetector, videoFrame);
  
  %Check if something was detected, otherwise exit
  if numel(bbox) == 0
    errordlg('Face not detected. Please try again.');
  end 
  
  %Show coordinates of tracked face
  videoOut = insertObjectAnnotation(videoFrame,'rectangle',bbox,'Face');
  release(obj);
  [hueChannel,~,~] = rgb2hsv(videoFrame);
  
  noseDetector = vision.CascadeObjectDetector('Nose');
  faceImage    = imcrop(videoFrame,bbox);
  
  noseBBox     = step(noseDetector,faceImage);
  % The nose bounding box is defined relative to the cropped face image.
  % Adjust the nose bounding box so that it is relative to the original video
  % frame.
  noseBBox(1:2) = noseBBox(1:2) + bbox(1:2);
  
  % Create a tracker object.
  tracker = vision.HistogramBasedTracker;
  initializeObject(tracker, hueChannel, noseBBox);
  ROI = get(obj,'ROI');
  videoSize = [ROI(3) ROI(4)];
  videoPlayer  = vision.VideoPlayer('Position',[300 300 videoSize(1:2)+30]);
  
  % Track the face over successive video frames until the video is finished.
  %You could set here a finite number of frames to capture
  while 1
  
      % Extract the next video frame
      videoFrame = step(obj);
  
      % RGB -> HSV
      hsv=rgb2hsv(videoFrame);
  
      % Track using the Hue channel data
      bbox = step(tracker, hsv(:,:,1));
  
      % Insert a bounding box around the object being tracked
      videoOut = insertObjectAnnotation(videoFrame,'rectangle',bbox,'Face');
   
     
      % Display the annotated video frame using the video player object
      step(videoPlayer, videoOut);
  end
  
  
  guidata(hObject,handles);
  
  % Release resources
  release(obj);
  release(videoPlayer);
  
  
  % --- Executes on button press in cameraoff.
  function cameraoff_Callback(hObject, eventdata, handles)
  % hObject    handle to cameraoff (see GCBO)
  % eventdata  reserved - to be defined in a future version of MATLAB
  % handles    structure with handles and user data (see GUIDATA)
  cameraoff=handles.vid;
  delete(cameraoff);
  
  
  
  % --- Executes on button press in startStopCamera.
  function startStopCamera_Callback(hObject, eventdata, handles)
  % hObject    handle to startStopCamera (see GCBO)
  % eventdata  reserved - to be defined in a future version of MATLAB
  % handles    structure with handles and user data (see GUIDATA)

face detection - off button gui not working

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