vehicle speed detection using image processing
显示 更早的评论
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
6 个评论
sai kiran
2016-9-30
can you send me the code
AVISHEK KUMAR
2017-5-6
编辑：Walter Roberson
2017-12-5
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
2017-12-16
Please can you give me the details about the algorithm for speed measurement. Because I'm doing this project.
Walter Roberson
2017-12-16
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
2017-12-31
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
2017-12-31
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.
采纳的回答
Image Analyst
2022-6-7
编辑：MathWorks Support Team
2022-6-7
0 个投票
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.
2 个评论
sridhar
2011-11-25
Image Analyst
2011-11-25
Yes it is. Simply have two calls to improfile with different line endpoints.
更多回答（4 个）
Thilakam kuttiannan
2017-12-5
编辑：Walter Roberson
2017-12-5
0 个投票
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
1 个评论
Walter Roberson
2017-12-5
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.
Thilakam kuttiannan
2018-8-28
编辑：Image Analyst
2018-8-28
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
5 个评论
Image Analyst
2018-8-28
Add this after the call to regionprops():
if isempty(stats)
continue;
end
Ameni chetouane
2019-6-11
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
2019-6-14
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
2019-6-18
thank your for your reply.
Ameni chetouane
2019-6-18
can i send you the video test to your mail address because i couldn't attach the video.
NGUYEN THE VY
2022-5-14
0 个投票
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!
1 个评论
Walter Roberson
2022-5-14
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
类别
在 帮助中心 和 File Exchange 中查找有关 Detection and Tracking 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
