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vehicle speed detection using image processing

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sridhar
sridhar 2011-11-24
编辑： MathWorks Support Team 2022-6-7
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
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SHOBA MOHAN
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
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.

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采纳的回答

Image Analyst
Image Analyst 2022-6-7
编辑：MathWorks Support Team 2022-6-7
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.
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sridhar
sridhar 2011-11-25
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
Image Analyst 2011-11-25
Yes it is. Simply have two calls to improfile with different line endpoints.

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更多回答（4 个）

Thilakam kuttiannan
编辑：Walter Roberson 2017-12-5
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
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Walter Roberson
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.

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Thilakam kuttiannan
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
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Ameni chetouane
Ameni chetouane 2019-6-18
can i send you the video test to your mail address because i couldn't attach the video.

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Thilakam kuttiannan
thank you very much sir
NGUYEN THE VY
NGUYEN THE VY 2022-5-14
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
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

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