vehicle speed detection using image processing
22 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
sridhar
am 24 Nov. 2011
Bearbeitet: MathWorks Support Team
am 7 Jun. 2022
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 Kommentare
SHOBA MOHAN
am 31 Dez. 2017
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
am 31 Dez. 2017
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.
Akzeptierte Antwort
Image Analyst
am 7 Jun. 2022
Bearbeitet: MathWorks Support Team
am 7 Jun. 2022
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 Kommentare
Image Analyst
am 25 Nov. 2011
Yes it is. Simply have two calls to improfile with different line endpoints.
Weitere Antworten (4)
Thilakam kuttiannan
am 5 Dez. 2017
Bearbeitet: Walter Roberson
am 5 Dez. 2017
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 Kommentar
Walter Roberson
am 5 Dez. 2017
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
am 28 Aug. 2018
Bearbeitet: Image Analyst
am 28 Aug. 2018
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 Kommentare
Ameni chetouane
am 18 Jun. 2019
can i send you the video test to your mail address because i couldn't attach the video.
NGUYEN THE VY
am 14 Mai 2022
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 Kommentar
Walter Roberson
am 14 Mai 2022
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
Siehe auch
Kategorien
Mehr zu Computer Vision with Simulink finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!