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function [Thetas, Rhos] = fcn( thetas,rhos)% This block supports an embeddable subset of the MATLAB language. % See the help menu for details.%initialise a frame count persistent count;if isempty(count) count = 0;end %remember previous outputspersistent lastRhos; persistent lastThetas;%initialise to same as first input for first entry into function if isempty(lastRhos)lastRhos = rhos; endif isempty(lastThetas) lastThetas = thetas;end %Assume that all is OK initiallyRhos = rhos; Thetas = thetas;if count == 4 %after the 4th frame, engage the test logicfor I = 1:length(rhos) if (abs(rhos(I) - lastRhos(I))>30) || (abs(thetas(I) - lastThetas(I))>10*(pi/180)) %too much change - just use the old values% outR(I) = lastRhos(I); % outT(I) = lastThetas(I);Rhos(I) = lastRhos(I); Thetas(I) = lastThetas(I);end endelse %otherwise just output the computed valuescount = count+1; end%assign outputs %Rhos = outR;%Thetas = outT;%remember outputs for next time lastRhos = Rhos;lastThetas = Thetas;

Connect the block as shown in the following picture:

In the main model, double-click the “Line Drawing and Image Construction” block.

Change the configuration of the “Draw Lines” block as follows:

Now, it will draw the polygon based on the two longest lines.

Add the following blocks to the subsystem:

Block Library Quantity
Concatenate Simulink /Math Operations 2
Selector Simulink / Signal Routing 3
Gain Simulink / Math Operations 1
Relational Operator Simulink / Logic and Bit Operations 1
Logical Operator Simulink / Logic and Bit Operations 1
Submatrix Signal Processing Toolbox:“Math Functions / Matrices and Linear Algebra / Matrix Operations” or “Signal Management / Indexing” 1

Connect the blocks as follows:

The blocks should be configured as follows:

  • Selector5:
  • Selector4:
  • Selector3:
  • Vertices Matrix:
  • Draw Lane
  • Superposition of Lane and Original Image
  • Extraction

Rename the “Line Detection” to “Lane Detection”. Save the model as “LaneDetection.mdl” The model should look as follows:

Double Click the Lane Detection block. You may rename the blocks’ names. It will look as follows:

Run your model.

Running this gives you the images in Figure 7.

Edge Detection on a Video Stream

Real time implementation using tcp/ip

Procedure

Open the “ RW_dm6437_tcpip.mdl ” Simulink model (generated in the " A Framework for Video Processing with the DM6437 DVDP " module).

Save the model as "lane_dm6437_tcpip.mdl".

Change the name of the “R_W Algorithm” block to “Lane Algorithm”.

The Real Time Implementation Model for Lane Detection

Right click on the "Build/Reload&Run" subsystem, choose “Block Properties”. Go to the Callbacks tab, and under OpenFcn* enter: “lane_tcpip_script('lane_pcl_tcpip');”, as shown in the following picture:

Double-click the “Task” block and make the same changes as shown:

Double-Click the “Lane Algorithm” subsystem.

Copy "Lane Detection and Tracking" block from "LaneDetection.mdl" into this model as shown.

Configure the "TCP/IP Receive" block :

Configure the "TCP/IP Send" block :

Configure the "Byte Unpack" block :

Configure the "Byte Pack" block :

Open the "RW_pcl_tcpip.mdl" model, created in the "Video R_W" directory.

Save the model as "lane_pcl_tcpip.mdl".

Double-click the “Video Source” block and make the same changes as shown:

Configure the "TCP/IP Receive" block :

Double-click the “Display” block, Double-click the “Data Unpack” block and Configure the "Byte Unpack" block as shown:

function lane_tcpip_script(hostModelName) % controls host-side TCP/IP processing for% Video Surveillance demo: %********** Initialization ********************% Get model name modelName = gcs;% Connect to CCS CCS_Obj = connectToCCS(modelName);saved_visibility = CCS_Obj.isvisible; CCS_Obj.visible(1);% Load application loadApp(modelName, CCS_Obj);% Run application fprintf('Running application: %s\n', modelName);CCS_Obj.run; % Allow some time for DHCP address acquisitionpause(3); % Retrieve target's host nameboardType = get_param([modelName '/IP Config'], 'boardType');userPrompt = sprintf('Enter the IP address or the host name of the %s board: ', boardType); hostName = inputdlg(userPrompt, 'Target IP address');if isempty(hostName) errordlg('You have to provide a valid IP address or host name to run the demo.',...'TCP/IP Surveillance Recording', 'modal'); return;end hostName = strtrim(hostName{1});% Launch host side UDP receive / Video display model fprintf('Launching host side application: %s\n', hostModelName);open_system(hostModelName); % Update host side TCP/IP blocks with target's IP addressset_param([hostModelName '/TCP//IP Send'], 'Host', hostName);set_param([hostModelName '/TCP//IP Receive'], 'Host', hostName);fprintf('Click on play button to start running the host side application!\n\n') %[EOF]tcpip_surveil_script.m

Open a new m-file, copy the following code and save it as "lane_tcpip_script.m" at the same directory as the model.

Running the real-time model

Build load and run the project from the "lane_dm6437l_tcpip.mdl" model. Double-click the "Build / Reload&Run" block.

Running the script, you will see:

Real-Time Edge Detection through a TCP/IP Interface

Questions & Answers

how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
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Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
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Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
Prasenjit Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
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Source:  OpenStax, From matlab and simulink to real-time with ti dsp's. OpenStax CNX. Jun 08, 2009 Download for free at http://cnx.org/content/col10713/1.1
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