Implementation of a Motion Detection System

Abstract

In today's competitive environment, the security concerns have grown tremendously. In the modern world, possession is known to be 9/10'ths of the law. Hence, it is imperative for one to be able to safeguard one's property from worldly harms such as thefts, destruction of property, people with malicious intent etc. Due to the advent of technology in the modern world, the methodologies used by thieves and robbers for stealing have been improving exponentially. Therefore, it is necessary for the surveillance techniques to also improve with the changing world. With the improvement in mass media and various forms of communication, it is now possible to monitor and control the environment to the advantage of the owners of the property. The latest technologies used in the fight against thefts and destruction are the video surveillance and monitoring. By using the technologies, it is possible to monitor and capture every inch and second of the area in interest. However, so far the technologies used are passive in nature, i.e., the monitoring systems only help in detecting the crime but do not actively participate in stopping or curbing the crime while it takes place. Therefore, we have developed a methodology to detect the motion in a video stream environment and this is an idea to ensure that the monitoring systems not only actively participate in stopping the crime, but do so while the crime is taking place. Hence, a system is used to detect any motion in a live streaming video and once motion has been detected in the live stream, the software will activate a warning system and capture the live streaming video. Keywords—Motion, Detection, System, Video, Crime, Matlab, Surveillance.

Full text

Abstract—In today’s competitive environment, the security
concerns have grown tremendously. In the modern world, possession
is known to be 9/10’ths of the law. Hence, it is imperative for one to
be able to safeguard one’s property from worldly harms such as
thefts, destruction of property, people with malicious intent etc. Due
to the advent of technology in the modern world, the methodologies
used by thieves and robbers for stealing have been improving
exponentially. Therefore, it is necessary for the surveillance
techniques to also improve with the changing world. With the
improvement in mass media and various forms of communication, it
is now possible to monitor and control the environment to the
advantage of the owners of the property. The latest technologies
used in the fight against thefts and destruction are the video
surveillance and monitoring. By using the technologies, it is possible
to monitor and capture every inch and second of the area in interest.
However, so far the technologies used are passive in nature, i.e., the
monitoring systems only help in detecting the crime but do not
actively participate in stopping or curbing the crime while it takes
place. Therefore, we have developed a methodology to detect the
motion in a video stream environment and this is an idea to ensure
that the monitoring systems not only actively participate in stopping
the crime, but do so while the crime is taking place. Hence, a
system is used to detect any motion in a live streaming video and
once motion has been detected in the live stream, the software will
activate a warning system and capture the live streaming video.
Keywords—Motion, Detection, System, Video, Crime, Matlab,
Surveillance.
I. INTRODUCTION ABOUT VIEO SURVEILLANCE
F
you consider video in the simplest of terms, video
surveillance began with simple closed circuit television
monitoring (CCTV). As early as 1965, there were press
reports in various countries across the world suggesting police
use of surveillance cameras in public places. When video-
cassette recorders hit the market, video surveillance became
really popular.
Analog technology using taped video-cassette recordings
meant surveillance could be preserved on tape as evidence. A
complete analog video-surveillance system consisted of a
camera, monitor, and VCR. The old tube camera was only
useful in daylight, and the VCR could only store eight hours
of footage at best. The drawback was that after a while,
1
Asif Ansari is currently, a Lecturer in the Dept. of Information Technology
of Thakur College of Engg. & Tech., Kandivili, Mumbai, Maharashtra,
India.
2
T.C. Manjunath is currently, Professor & Head in Electronics and
Communications Engineering Dept.
3
C.Ardil is with the National Academy of Aviation, AZ 1056 Baku,
Azerbaijan.
owners and employees of such a system would become
complacent and not change the tapes daily or the tapes would
wear out after months of being re-used. There was also the
problem of recording at night or in low light. While the
concept was good, the technology hadn’t yet peaked. The next
step was the Charged Coupled Device camera (CCD), which
used microchip computer technology. In the 1990’s video
surveillance made great strides in practicality by the
introduction of digital multiplexing. When digital multiplexer
units became affordable, it revolutionized the surveillance
industry by enabling recording on several cameras at once
(more than a dozen at time in most cases) [1].
Three key factors brought on the popular use of the digital
video recorder. They are
• The advancement in compression capability, allowing
more information to be stored on a hard drive. (Round-
the-clock surveillance produces a lot of information.)
• The cost of a hard drive, which has dropped dramatically
in recent years.
• The storage capacity of a hard drive, which has increased
dramatically in recent years.
Digital video surveillance made complete sense as the price
of digital recording dropped with the computer revolution.
Rather than changing tapes daily, the user could reliably
record a month's worth of surveillance on hard drive. The
images recorded digitally were so much clearer than the often
grainy images recorded with analog that recognition was
immediately improved for identification purposes. Digitally
stored images can also be enhanced in various ways (add
light, change colors, reverse black and white) to make crucial
determinations. With videotape, what you see is what you get.
The paper is organized as follows [17]. A brief introduction
to the surveillance system was presented in the previous
paragraphs. The requirements of the video surveillance are
depicted in brief in section 2. Motion detection in live video
stream is presented in section 3, followed by the work
specification in section 4. The study and analysis of the work
is presented in section 5. Section 6 describes the motion
detection algorithm. Various types of graphical user
interfaces developed for this work is presented in section 7.
Results and discussions is presented in section 8, followed by
the conclusions in section 9 [17].
Implementation of a Motion Detection System
Asif Ansari
1
, T.C.Manjunath (Ph.D., IIT Bombay)
2
, C.Ardil
3
I
World Academy of Science, Engineering and Technology 45 2008
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II. REQUIREMENT
OF VIDEO SURVEILLANCE
While it is important to understand the various places video
surveillance can be used it is also important to asses the risks
involved in the protection of a certain item. In the recent
years, as more and more items such as art are gaining
importance, the prices of such things are also going through
the roof. Therefore, technology has come in the forefront for
protection and surveillance of such goods and items. When
assessing risk one of your inputs should be theft statistics. The
following are the statistics of thefts in places such as shops,
residences and in public places in our country, India in a
particular year. Of the 50 reported thefts in one year, the
breakage of thefts can be shown as the following [2]:
• Display Cases 19
• Open displays 10
• Pictures 04
• Other displays 02
• At night 06
• From stores 02
• Long timescale 04
• Other 03
This means that even though technology has improved
dramatically in the past few decades, it has still a long way to
go. It is clearly seen from the statistics that although the focus
of security surveillance is on gaining evidence against crimes
and thefts, the thought process should change to stopping
thefts and crimes while they are in progress.
III. MOTION
DETECTION IN LIVE VIDEO STREAM
When all is said and done, surveillance systems should be a
reflection of the real world we live in. As people become more
and more security savvy, they will demand real protection for
their property. The new digital video systems will have to
raise that security to a new level. They should make the
customers feel good. Scare off a few troublemakers. And
those who do try to beat the system should face a far greater
risk of getting caught. Hence, the new digital video
surveillance systems should be able to provide a high sense of
security. The peace of mind can only be achieved when the
person is assured that he will be informed of any thefts of his
property while they are in progress. He would also feel more
secure if he can be guaranteed that the surveillance system
that he uses will not only give him evidence against the
perpetrators but also try to stop the thefts from taking place in
the first place. Therefore, to achieve such kind of security
Motion Detection in the live video stream is implemented. The
motion detection systems will not only be monitoring the
areas of interest but will also keep an active lookout for any
motion being produced.
IV. WORK
SPECIFICATION
Aim: In our project we have aimed to build such a
surveillance system, which can not only detect motion, but
will
a) Warn the user of the intrusion and
b) Record the footage of the video from the moment the
motion was detected.
Coding Language: To fulfill our aim, we have used a strong
computing software called Matlab 7 [3].
Advantage of Matlab: Basically the advantage of using Matlab
is that Matlab is an interpreted language for numerical
computation. It allows one to perform numerical calculations,
and visualize the results without the need for complicated and
time consuming programming. Matlab allows its users to
accurately solve problems, produce graphics easily and
produce code efficiently.
Disadvantage of Matlab: The only problem with Matlab is that
since Matlab is an interpreted language, it can be slow, and
poor programming practices can make it unacceptably slow. If
the processing power of the computing machine is low the
Matlab software takes time to load and execute any code
making the code execute very slowly.
Reason for Selection: We used Matlab to develop our work,
because Matlab provides Image Acquisition and Image
Processing Toolboxes which facilitate us in creating a good
GUI and an excellent code.
Approach: Using a video input object, live data is acquired
and analyzed to calculate any motion between two adjacent
image frames. Any motion in the image stream is plotted in a
MATLAB figure window as shown in Fig. 2.
Fig. 1 M-Play figure file function
V. STUDY AND ANALYSIS
The objective of this work was to develop a surveillance
system which would detect motion in a live video feed and if
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724

motion is detected, then to activate a warning system and store
the video feed for future reference and processing purposes.
The activation of an alarm would help in nullifying a threat of
security and storing of video provides a proof of such
malicious activity. Keeping the work objective in mind, we
firstly developed basic system architecture as shown in the
Fig. 2.
Fig. 2 A basic system architecture of our system
The system architecture, which we developed, describes
how the system component interacts and work together to
achieve the overall system goals. It describes the system
operation, what each component of the system does and what
information is exchange. The architecture was designed for
basically getting an idea of how the actual system works and
operates [4].
A. System architecture functioning
The system architecture is going to function in following way:
• Capturing the live video feed through a web cam : To
detect motion we first have to capture live video frames
of the area to be monitored and kept under surveillance
this is done by using a web cam which continuously
provides a sequence of video frames in a particular speed
of FPS (frames per second).
• Comparing the current frames captured with previous
frames to detect motion: For checking whether any
motion is present in the live video feed, we compare the
live video frames being provided by the web cam with
each other so that we can detect changes in these frames
and hence predict the occurrence of some motion..
• Storing the frames on the memory if motion is detected :
If motion is being detected, we would require storing
such motion so that the user can view it in the near future.
This also helps the user in providing a legal proof of some
inappropriate activity since a video coverage can be used
as a proof in the court of law.
• Indicating through an alarm when the motion is detected :
The user may want to be notified immediately that there
has been some intrusion detected by the software, hence
an alarm system is included in the software. This alarm
system immediately activates a WAV file format audio
alarm signal if any kind of motion is detected hence. This
helps in preventing any kind of breach of security at that
moment of time.
B. Selection criteria of the tasks
Our work is motion based change detection in .avi video
format. Before beginning with the work, one of the important
tasks was deciding the various tasks required to implement the
work. Therefore, we performed a brain storming session and
decided various important tasks which would be required in
completion of the work such as:
• Analysis and study of the problem definition,
• Deciding the requirements of the system being developed,
• System architecture containing the following sub function:
 Capturing,
 Comparing
 Storing and
 Indication of motion
• Developing the code and
• Documentation.
After deciding the various important tasks in our work, we
decided that the platform on which we are going to develop
our code will be Matlab. We choose Matlab because various
video acquisition and analysis functions are pre-defined in
Matlab that would make the development of our work much
easier. Finally, just before we started developing the code, we
designed a rough GUI and created a design, which would suit
our needs and perform all activities, which were desired by us
and would be easier to use by anybody.
C. Motion detection
1) RATIONALE
The detection of motion essentially requires the user to
perform two major steps. They are: foremost step is to setup
the hardware for acquiring the video data in which the motion
is to be detected and the later step is to actually device an
algorithm by which the motion will be detected. The AVI
video format is actually an interleave of Audio and Video.
The video stream is stored or acquired as a series of frames
occurring in an ordered sequence one after the other [5].
2) ACQUISITION SETUP
The Matlab programming language is used to store data in
the form of matrices. Therefore Matlab can provide quick
interface with data matrices. The software provides for frame
acquisition from hardware devices such as web cams or digital
cameras as long as the devices are correctly initialized by the
programmer. Therefore, in order to allow quick setup with the
image acquisition devices, Matlab Function directory provides
a host of predefined functions by which the user can inquire
about the various different devices currently connected and
then setup the required device with Matlab so that it can
acquire and store data at run time.
VI. MOTION
DETECTION ALGORITHM
The Matlab interface allows the user to define the
commands to be performed at the run time. Once the user
setup of the video source is complete the algorithm comes into
play. The algorithm is built to take advantage of the strength
of Matlab i.e. to store data as a form of matrices. The frames
acquired are stored in the Matlab directory as matrix in which
each element of the matrix contains information about the
pixel value of the image at a particular location. Therefore,
the pixel values are stored in the workspace as a grid where
every element of the matrix corresponds to an individual pixel
World Academy of Science, Engineering and Technology 45 2008
725

value [6].
Since Matlab considers each matrix as one large collection
of values instead of a bunch of individual values it is
significantly quicker in analyzing and processing the image
data. The algorithm hence checks each frame being acquired
by the device with the previously acquired frame and checks
for the difference between the total values of each frame. A
threshold level is set by the user with which the difference of
values is compared. If the difference exceeds the threshold
value the motion is said to be detected in the video stream.
The various codes used in this work are shown below.
CODE :
% --- Outputs from this function are returned
to the command line.
function varargout = New1_OutputFcn(hObject,
eventdata, handles)
varargout{1} = handles.output;
guidata(hObject, handles);
set(handles.Mstart,'enable','off');
set(handles.Mstop,'enable','on');
set(handles.Vstart,'enable','off');
set(handles.Vstop,'enable','off');
set(handles.Mstop,'UserData',0);
vid = videoinput('winvideo');
handles.vid = vid;
set(handles.vid,'FramesPerTrigger',50);
[filename, pathname] = uiputfile('*.avi');
aviobj = avifile(filename,'fps',25);
set(handles.vid,'TriggerRepeat',Inf);
triggerconfig(handles.vid, 'Manual');
guidata(hObject, handles);
global pr
if(pr==10)
pr=1;
end
start(handles.vid);
trigger(handles.vid);
y = (getdata(handles.vid,1,'uint8'));
count = 0;
countbck = 0;
cntsnap = 1;
while 1
trigger(handles.vid);
yprev = y;
if get(handles.Mstop,'UserData')
global lp
if lp==0
lp = lp + 1;
z= imread('nomot.tif');
aviobj = addframe(aviobj,z);
end
aviobj = close(aviobj);
stop(handles.vid);
delete(vid);
clear vid;
break
else
y = (getdata(handles.vid,1,'uint8'));
diff = abs(y-yprev);
diff = abs(y-yprev);
abs_img = mean(diff(:));
axes(handles.axes1);
subimage(y);
if abs_img >
str2num(get(handles.editSens,'string'));
count = count + 1;
else
countbck = countbck +1;
end
if count >= 3;
global lp
lp = lp + 1;
for i=1:5
z=getimage(handles.axes1);
aviobj = addframe(aviobj,z);
end
global pr
if pr == 1
global filename1
[t,Fs] = wavread(filename1);
player = audioplayer(t,Fs);
play(player);
global pr
pr = 10;
end
end
end
end
axes(handles.axes1);
cla;
subimage(handles.S);
delete(handles.vid);
clear handles.vid;
imaqreset;
clear handles.axes1;
guidata(hObject, handles);
% --- Executes on button press in Mstop.
function Mstop_Callback(hObject, eventdata,
handles)
guidata(hObject, handles);
set(handles.Mstart,'enable','on');
set(handles.Mstop,'enable','off');
set(handles.Vstart,'enable','off');
set(handles.Vstop,'enable','off');
set(handles.Mstop,'UserData',1);
guidata(hObject, handles);
FUNCTION EXPLANATION
a) Function Name:
The Function name Mstart is executed as the Monitor
button in the GUI is pressed by the user. It takes the value of
the GUI from the user and updates it in the workspace.
b) Set:
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The set command is used to change the looks and controls
available to the user in the GUI. It is used to change the value
of the buttons and is also used to prevent the user from
pressing buttons which cannot logically occur again. As the
number of buttons that can be pressed by the user reduces, the
amount of confusion in the users mind will also reduce as the
process will be self guiding thereby reducing the number of
errors or bugs and to ensure that user’s experience is hassle
free [7].
c) Video Input:
The video input command is used to setup the video source
for the rest of the program to be run.
% Syntax Checking
requestedDevice =
hwInfo.DeviceInfo(infoIndex);
deviceFileOK =
requestedDevice.DeviceFileSupported;
defaultFormat = requestedDevice.DefaultFormat;
supportedFormats =
requestedDevice.SupportedFormats;
checkSupported = strcmpi(formatType,
supportedFormats);
% Based on the syntax called, determine the
format option and extract any PV pairs
present.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function [newDeviceFile, fileFlag] =
localAddPathToFile(deviceFile)
% Adds the path to the device file if none are
present.
% Initilaize.
fileFlag = true;
newDeviceFile = deviceFile;
% Check to see if a path was already present
[pathStr, fileName, fileExt] =
fileparts(deviceFile);
if isempty(pathStr),
% If no file extension was provided either,
% must assume it's not a device file.
if isempty(fileExt)
fileFlag = false;
end
% Try to add a path and extension (via WHICH).
If file is
try
pathLocation = which(deviceFile);
if ~isempty(findstr(pathLocation,
fullfile('matlab', 'ops'))),
pathLocation = '';
end
catch
pathLocation = '';
end
if ~isempty(pathLocation),
newDeviceFile = pathLocation;
fileFlag = true;
end
end
The codes presented above are snippets of the processes
performed by Matlab when the video input command is called
into play. The initial four commands are given to inquire
about the presence and status of the camera that has been
stated in the program. The subsequent function is carried out
if Matlab is able to connect and initialize the specified device.
If the connection is successfully established Matlab just sets
its input location to the device, which has been initialized, and
then keeps on catching the frames as input data from the
device [8].
d) Uiputfile:
The Uiputfile function is used to allow the user to define
the name and storage space of the output file of the video.
This function is essential for two major reasons:
i) It allows the Matlab to save the file exactly where the
user specifies thereby ensuring the user can easily find
the storage location.
ii) It allows the user to name the file thereby allowing him
to keep a record of each and every file without the
chances of any previous record being overwritten.
e) Aviobj:
The AVI object command is used to create an object file of
the type AVI. The AVI file is a standard video format with a
predefined method of encryption. Therefore, a class file is
already present in Matlab and the AVI object file defines an
instance to create the AVI file in which the motion is being
stored. The object created is set to the filename specified by
the user in the previous function.
f) Get:
The get function is used to interface with the GUI file. It
checks the status and returns the current value of the GUI
button as specified.
g) Start Vid:
The Start function is used to start the video acquisition
device to get the frame from the device object.
h) Stop Vid:
The Stop function is very important in the video acquisition
device. The Start function begins the video stream entering as
input to Matlab. The stop function will stop this input. If the
function is not used, the video stream continues in the path
already started by Matlab. If the user will try to use it again,
Matlab will not be able to start it again as the path will be
busy. It will therefore stop the reusability of the program
unless the whole of Matlab reinitializes [9].
i) Delete Vid:
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The delete function is used to delete the temporary frames
stored by Matlab in the object file. This function will free up
the workspace as well as enable the function to reuse the
pathname.
j) Imaqreset:
The imaqreset function is very important as it resets the
acquisition device altogether. It ensures that the frame buffer
in the object is free and completely new at the time the device
restarts. It also resets the device therefore ensuring that there
is no device present for acquisition and the device can be used
for other uses.
A. VIDEO, AUDIO, HELP AND GUI:
This section describes about the further development of the
video and the audio units along with the help and the
graphical user interfaces.
1) VIDEO
The software produces an AVI video file as it monitors the
area in view. Irrespective of the fact that most modern
operating systems would provide various different software’s
to play video files in AVI format, the user should be able to
view the file without having to switch programs and searching
for it. Hence, it is of the utmost importance that there should
be a video player that plays the video stream that has been
produced.
CODE
% --- Executes on button press in Vstart.
function Vstart_Callback(hObject, eventdata,
handles)
% hObject handle to Vstart (see GCBO)
% eventdata reserved - to be defined in a
future version of MATLAB
% handles structure with handles and user data
(see GUIDATA)
guidata(hObject, handles);
set(handles.Mstart,'enable','off');
set(handles.Mstop,'enable','off');
set(handles.Vstart,'enable','off');
set(handles.Vstop,'enable','on');
handles.output = hObject;
[filename2] = uigetfile('*.*');
mplay(filename2);
Explanation of the video code :
a) Uigetfile:
The uigetfile function is used to retrieve a file from the hard
drive. The function is used here to ensure that the user has the
option : choose the movie file that the user wants to playback.
Although it may seem illogical since only one file is created in
each instance, the user may want to keep a track of other files
in the record or may want to play a previously recorded video.
b) Mplay:
The mplay function is a built in video player in the Matlab
library function. It can play a host of multimedia files as well
as be called from the Matlab command prompt. It has a
Graphical User Interface to play the video file thereby
allowing the user to stop, play as well as forward and rewind
the file. The mplay function is predefined and encrypted in
Matlab to be run with the various programs created by the
user. The source code for the player is protected [10].
2) AUDIO
In order for the software to act as a surveillance system it is
important to provide a mechanism to raise an alarm in case
motion is detected in the video stream. However, conversely,
stealth may be required in a few cases where alarms may
prove more harmful. Therefore, an alarm function is required
which will allow the user to choose the audio function as per
his requisites.
CODE
function Alarm_Callback(hObject, eventdata,
handles)
button_state = get(hObject,'Value');
if button_state == get(hObject,'Max')
icon5=imread('Volume.png');
set(handles.Alarm,'CData',icon5)
global filename1
[filename1] = uigetfile('*.wav');
global pr
pr=1;
elseif button_state == get(hObject,'Min')
icon5=imread('RedVolume.png');
set(handles.Alarm,'CData',icon5)
global pr
pr=0;
end
% --- Executes Alarm.
[t,Fs] = wavread(filename1);
player = audioplayer(t,Fs);
play(player);
Explanation of the audio code :
a) Get:
The get function is used to interface with the GUI file. It
checks the status and returns the current value of the GUI
button as specified.
b) Global:
The global function is used to specify that the global
variable is being called into play. Matlab ensures that every
variable is local only to its local function to reduce complexity
and to reduce conflicts between similarly named variables.
The global function makes the variable accessible to all
functions in the program to allow different functions to
change variables according to the necessity [11] .
c) Waveread:
The wav read function is a Matlab function to read and
store audio files in the wave audio format. It can search and
find the first RIFF chunk of data in the file. It then opens the
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file for the wave player and searches for the next subsequent
chunks of data. It does not open the subsequent chunks but
just reads the type of chunk that is present and forwards it to
the player.
d) Audioplayer:
The audio player function is an audio playing file, which
can play a host of audio signals in Matlab. It essentially
initializes the audio file sent to it by the waveread or auread
function and creates an audio signal object which returns the
number of bits each signal takes up [12].
e) Play:
The play function starts and runs the audio signal object
created in the audio player function. It plays each audio
sample as provided in the audio file as it enters in the audio
player. The following are snippets of the play function of the
audio player. It checks for any present errors and if not, plays
the audio sample.
if ~isa(obj, 'audioplayer')
error('MATLAB:audioplayer:noAudioplayerObj',
...
audioplayererror('MATLAB:audioplayer:noAudiopl
ayerObj'));
end
error(nargchk(1, 2, nargin, 'struct'));
if isempty(varargin)
play(obj.internalObj);
else
play(obj.internalObj,
double(varargin{:}));
end
3) HELP
The help function is a prerequisite for any good software to
ensure that the user can use each and every function of the
program. The help file of any software should be detailed with
examples or instructions about using the software to improve
user’s interaction with the software.
CODE
% --- Executes on button press in Vstop.
function Vstop_Callback(hObject, eventdata,
andles)
guidata(hObject, handles);
handles.output = hObject;
S = imread('welcome.tif');
handles.S = S;
axes(handles.axes1);
subimage(S);
mdhelp
function varargout = mdhelp(varargin)
TEX('CALLBACK',hObject,eventData,handles,...)
calls the local function named CALLBACK in
TEX.M with the given input arguments.
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',
mfilename, ...
'gui_Singleton',
gui_Singleton, ...
'gui_OpeningFcn',
@tex_OpeningFcn, ...
'gui_OutputFcn',
@tex_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 tex is made
visible.
function tex_OpeningFcn(hObject, eventdata,
handles, varargin)
guidata(hObject, handles);
function varargout = tex_OutputFcn(hObject,
eventdata, handles)
varargout{1} = handles.output;
Explanation of the help :
Mdhelp:
The mdhelp is a completely new gui file which acts as a
popup when called as a function. It contains a static text box
that acts as a frame in which there are instructions stored
about how to use the given software. The text frame contains a
step-by-step guide to running and interfacing with the
software to help the user make various decisions about the
options he wants exercise.
GUI
The modern operating systems allow for almost every
program to run using visual icons and Interfaces. Hence, most
users would be put off from using software’s that are
completely text based to run. Matlab provides the programmer
with Matlab GUIDE which is a tool for generating user
interfaces for the programs [13].
CODE
function varargout = New1(varargin)
% Begin initialization code-DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',
mfilename,...
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'gui_Singleton',
gui_Singleton,...
'gui_OpeningFcn',
@New1_OpeningFcn,...
'gui_OutputFcn',
@New1_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 New1 is made
visible.
function New1_OpeningFcn(hObject, eventdata,
handles, varargin)
% Choose default command line output for New1
imaqreset
handles.output = hObject;
icon1=imread('movies.png');
icon2=imread('stop.png');
icon3=imread('imovie.png');
icon4=imread('help.png');
icon5=imread('RedVolume.png');
set(handles.Mstart,'CData',icon1)
set(handles.Mstop,'CData',icon2)
set(handles.Vstart,'CData',icon3)
set(handles.Vstop,'CData',icon4)
set(handles.Alarm,'CData',icon5)
S = imread('welcome.tif');
handles.S = S;
axes(handles.axes1);
subimage(S);
global lp pr qw
lp=0;
pr=0;
qw=0;
Mon_Callback(hObject, eventdata, handles);
guidata(hObject, handles);
function varargout = New1_OutputFcn(hObject,
eventdata, handles)
varargout{1} = handles.output;
% --- Executes on button press in Mon.
function Mon_Callback(hObject, eventdata,
handles)
state of Mon
imaqreset
handles.output = hObject;
clear vid;
clear log;
S = imread('welcome.tif');
handles.S = S;
axes(handles.axes1);
subimage(S);
set(handles.Mstart,'enable','on');
set(handles.Mstop,'enable','off');
set(handles.Vstart,'enable','off');
set(handles.Vstop,'enable','on');
% --- Executes on button press in Cap.
function Cap_Callback(hObject, eventdata,
handles)
state of Cap
set(handles.Mstart,'enable','off');
set(handles.Mstop,'enable','off');
set(handles.Vstart,'enable','on');
set(handles.Vstop,'enable','on');
function editSens_Callback(hObject, eventdata,
handles)
function editSens_CreateFcn(hObject,
eventdata, handles)
if ispc &&
isequal(get(hObject,'BackgroundColor'),
get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
VII. DEVELOPED GRAPHICAL USER INTERFACES
Fig. 3 Main GUI window used for monitoring purposes
FUNCTION EXPLANATION
a) Initialization:
The beginning lines are meant for initializing the program
file before the function opens and runs. It sets the type of GUI
by specifying if single or multiple instances can run at the
same time [14].
b) Opening Function:
The opening function is run just before the GUI is made
visible to the user. It contains the various instructions to
initialize the figure file so that it can run as a cohesive unit
with the program.
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c) Figure File:
The figure file is a screenshot of the figure as created
without the fringe icons and background. The initialization
code ensures that the final interface looks better and is more
appealing to the user.
d) Imread:
The Imread function is the Matlab function, which can read
image files and store their values in a variable. The variables
created are matrices containing the RGB pixel value of
images.
e) Axes:
The axes function corresponds to the various axis figures
present in the figure file. It sets up the axis with the
corresponding output required.
f) Sub image:
Matlab provides the sub image function to output images.
This function returns the image instead of the mathematical
equivalent of the pixel values [15].
g) Callback Function:
The callback function is the auto-generated function that is
called every time the user uses the corresponding interface.
The callback function contains values that change every time a
particular callback occurs. The callbacks are generated for
buttons. Toogle buttons, Radio buttons, Dynamic strings etc.
SYSTEM
MAINTENANCE & HOW IT WORKS
Fig. 4 GUI-1
Initially, on executing the code, the above GUI shown in
Fig. 4 will get opened and displays the various icons, an axis
and a sensitivity tool bar. This information displayed
corresponds to the various features, which we have
incorporated in our software. Each icon fulfills a specific
feature the axis displays the video feed from the web cam an
the sensitivity tool is used to manipulate the sensitivity of the
software to detect motion.
Fig. 5 GUI-2
On clicking the HELP icon a help menu as shown in Fig. 5
is displayed which gives general directions in a very simple
language on how to use the GUI. We tried to use a very
simple language so that any user even a layman can
understand can use the software easily.
Fig. 6 GUI-3
We have given user the facility to use an alarm signal
which will be triggered when a motion is detected as shown in
the Fig. 6. This can be done by using the alarm icon on left
bottom side of the GUI. On clicking this icon a user can direct
the path to any .WAV file which he wants to hear as alarm.
Once the alarm is set the icon turns into a green colour as
shown in the Fig. 7.
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Fig. 7 GUI-4
To start monitoring the system we first click on the monitor
check button on top left corner of the GUI (default is set on
monitor). Now, we click the monitor icon on the middle right
side of the GUI. A window as shown above will pop up on
clicking this icon [16].
Fig. 8 GUI-5
When this window pops up on clicking the monitor icon, a
user can give any filename by which he wants to save the
video file press save after the filename is given as shown in
the Fig. 5. If the motion is detected the video file will be
saved under this filename and even if no motion is detected
that information will be stored under this filename.
Fig. 9 GUI-6
After we have given the filename the monitoring starts and
the video feed is shown from the web cam as shown in the
Fig. 9. There will be no externally triggered activity till there
is no motion once a motion is detected the software will
trigger the alarm and start storing the video under the filename
specified by the user. To stop the storing of the video the user
has to click the stop icon in the right middle of the GUI as
shown in the Fig. 9.
Fig. 10 GUI-7
After pressing the stop icon the GUI comes in the default
view and the video display from the web cam is stopped.
Now to view the video the user has to click the video check
button on the left top of the GUI.
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Fig. 11 GUI-8
After the user has clicked the video check button video icon
on the right bottom side of the GUI is highlighted as shown in
the Fig. 11. To view the video the user has to click this icon.
Fig. 12 GUI-9
On clicking the video icon the above window will pop up as
shown in the Fig. 12 which will show the folder inside which
the videos are saved.
The video which you want to view can be executed by
clicking on that video file’s filename and then clicking the
open button of the pop up window.
If any motion had been detected the mplayer will pop up
and the user can view the video of the surveillance by clicking
the play (90 degrees turned triangle) button on the mplayer as
shown in the Fig. 13.
Fig. 13 GUI-10
Fig. 14 GUI-11
If no motion has been detected, then the mplayer displays
the above information as shown in the Fig. 14.
VIII. RESULTS
AND DISCUSSION
The graphical user interfaces developed shows the
effectiveness of the surveillance method in the work. This has
got many features and of course some limitations also, which
are discussed below.
Features included : We have included various important
features in our work
• We have developed a GUI in our code which allows a
user to use our software with ease and efficiently.
• Our software can be integrated and used with any
company manufactured web cam.
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• We have provided the user a facility to use any audio
(.Wave) file as alarm signal. If the user wants he can use
the software without the alarm audio signal.
• The user can store the recorded video after the motion has
been detected on any place in the hard disk.
• We have used icons instead of usual buttons in our GUI
to make a layman user more comfortable in using our
software.
• Only one instance of our software can run at a single time
hence reducing confusion due to multiple instances of
same software running.
• The stored video is viewed in a Matlab media player
which allows all the features of a media player and hence
we can forward, rewind, pause etc a stored video.
Limitations:
• More features could have been added but due to time
constraint they could not be added. But this is not an issue
since the code can be directly extracted and manipulated
to include new features.
• The code is dependent on Matlab compiler without which
the code would not run but this is not a problem since
acquiring Matlab is not difficult.
IX. CONCLUSION
A video monitoring & detection system was thus developed
successfully in this paper. This system mainly provides an
efficient method for surveillance purposes and is aimed to be
highly beneficial for any person or organization. Thus, a
motion based change detection in avi video format was
completed and successfully implemented. The future scope of
the work done could be as follows: the due course of time as
we started to understand the minute details of our work, we
significantly realized that our software would be tremendously
important in the future world. Following changes or additions
can be done on our work to include some new features.
• With the existing alarm system, advancement can be
included and SMS can be sent to the user when motion is
detected.
• The stored video can be automatically transferred to some
email account so that an extra backup data can be used.
• A user_id and password can be given to a user so that
unauthorized people don’t have access to the software.
• A facility for the user can be given where he can mainly
monitor only a small specific area in the range of the web
cam.
• In the future, the user can be provided a remote access to
this software from some remote PC through internet.
• Include an option to take snaps periodically, manually or
automatically.
• Work could be done to make the system more users
friendly for a layman user
R
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