vehicle speed detection using image processing

hi, i am doing a project to find vehicle speed using image processing. the procedure to find the speed is using kinematics equation,our video contains two imaginary lines one is starting line and other is ending line.when vehicle crosses first line counts the time upto vehicle reaches end line.distance between lines known to us and time calculated from algorithm.....how to find when vehicle crosses first line and leaves the second line ....... waiting for reply thanks you in advance

[sai kiran]

can you send me the code

[AVISHEK KUMAR]

clc;
close all;
inputvideo=vision.VideoFileReader('traffic.avi');
vid1=vision.VideoPlayer;
while~isDone(inputvideo)
frame1=step(inputvideo);
step(vid1,frame1);
pause(0.005);
end
imwrite(frame1,'D:\referenceimage.jpg','jpg');
release(inputvideo);
release(vid1);
referenceimage=imread('D:\referenceimage.jpg');
vid2=vision.VideoFileReader('Traffic.avi');
X=zeros(2,121);
Y=zeros(2,121);
Z=zeros;
for i=2:121
clc
frame=step(vid2);
frame2=((im2double(frame))-(im2double(referenceimage)));
frame1=im2bw(frame2,0.2);
[labelimage]=bwlabel(frame1);
stats=regionprops(labelimage,'basic');
BB=stats.BoundingBox;
X(i)=BB(1);
Y(i)=BB(2);
Dist=((X(i)-X(i-1))^2+(Y(i)-Y(i-1))^2)^(1/2);
Z(i)=Dist;
if(Dist>10&&Dist<20)
display('MEDIUM SPEED');
elseif(Dist<10)
display('SLOW SPEED');
else
display('FAST SPEED');
end
S=strel('disk',6);
frame3=imclose(frame1,S);
step(vid1,frame1);
pause(0.05);
end
M=median(Z);
Speed=(M)*(120/8);
release(vid1)

[saravana arumugam]

Please can you give me the details about the algorithm for speed measurement. Because I'm doing this project.

[Walter Roberson]

saravana arumugam: the algorithms for vehicle speed measurement depend upon your situation. Are you using a fixed camera position and fixed focus and a scene in which the real-world distance between two points on the image is known? Or are you using a pair of cameras giving a stereo view onto an scene in which distances are not known? Or do you have a situation with one or more moving cameras?

[SHOBA MOHAN]

Though I got the output, the following error also comes after the execution of the above code mentioned by @Avisekkumar . Can anyone help me how to resolve it?

Too many outputs requested.  Most likely cause is missing [] around left hand side that has a comma separated list
expansion.

Error in speed_1 (line 25)
BB=stats.BoundingBox;

[Walter Roberson]

That code is wrong. It assumes that only one region will be found on the video. You can get rid of the error message by using

BB = stats(1).BoundingBox;

but this will just pick out the first thing it finds in the image, without concern about whether it makes sense.

Answer 1

[Image Analyst]

2022 Update - In general, with the Computer Vision Toolbox, you can calibrate the camera to the road and use point tracking. The Sensor Fusion and Tracking Toolbox is an option to fuse data from multiple sensors to maintain situational awareness and localization.

Look for significant changes in the line. For example use improfile (to get the intensity profile along a line) and sum the values along the line and see when it make a big change in value.

[sridhar]

thank you sir,

i have a doubt , Is it possible to keep on observe the changes along the line , i mean sum of pixel values automatically?.

and in my image two lines will present, Is it possible to monitor the two lines separate which is useful to know when vehicle cross first line and second line.

[Image Analyst]

Yes it is. Simply have two calls to improfile with different line endpoints.

Answer 2

[Thilakam kuttiannan]

sir

I have a doubt.I am currently doing a project on vehicle speed detection. when I am using your code I am getting an error ??? Undefined function or variable 'vision'. what is the problem with this code. What is an alternative of this error.

sir currently i am using Matlab 2010 b version

waiting for reply thanks you in advance

[Walter Roberson]

The Computer Vision Toolbox did not exist in R2010b. In R2010b, all that existed was https://www.mathworks.com/help/releases/R2010b/toolbox/vipblks/ Video and Image Processing Blockset which was for Simulink.

You would need at least R2012a to use the Computer Vision Toolbox.

Answer 3

[Thilakam kuttiannan]

Sir

I have a doubt.I am currently doing a project on vehicle speed detection. when I am using your code I am getting an error ??? Insufficient number of outputs from right hand side of equal sign to satisfy assignment.

Error in main (line 28)
    BB= stats.BoundingBox;

What is the problem with this code? What is an alternative of this error?

Sir currently I am using Matlab 2015 b version.

Waiting for reply thanks you in advance

Herewith i have attached the coding also

[Image Analyst]

Add this after the call to regionprops():

  if isempty(stats)
    continue;
  end

[Ameni chetouane]

Sir I used your code for vehicle speed detection but I m getting the value of M and S=0

What is the problem with this code?

Waiting for reply thanks you in advance.

[Walter Roberson]

We do not have your pontbiz2.mp4

I tried using traffic.avi as Image Analyst suggested, but I discovered that it has been unreadable in every release since at least R2014a.

[Ameni chetouane]

thank your for your reply.

[Ameni chetouane]

can i send you the video test to your mail address because i couldn't attach the video.

Answer 4

[Thilakam kuttiannan]

thank you very much sir

Answer 5

[NGUYEN THE VY]

i dont know how to do the theoretical basis part for this project. I hope anyone help me list me

theory section.

thank you very much!

[Walter Roberson]

See my comment above. You might need to click to expand comments.

https://www.mathworks.com/matlabcentral/answers/22194-vehicle-speed-detection-using-image-processing#comment_516852