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I am new to OpenCV and have got a project to detect and count the number of vehicles and people in a video taken from a still camera. From Google, I found out that background subtractor helps but have some queries though:

  1. What is the use of background subtractor if I can detect (but could not count) vehicles and humans from the original video? Background subtractor makes the original video into a binary video.

  2. Detection in the original video is inconsistent. If my Region of Interest (ROI) is a line then there is hardly any count. On the other hand, if my ROI is a rectangle then one vehicle gets count many times.

  3. How to count the vehicles and people in a time frame? For eg.: No. of people (or vehicle) per minute. Store the number and count again after a minute. And the process continues.

Thank You.

thewaywewere
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Manan Bothra
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  • Can you attach sample consecutive input frames – ZdaR Jun 15 '17 at 15:38
  • Couly you please split that up into several questions? – Jens Baitinger Jun 15 '17 at 18:08
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    1) For vehicle and human detections, OpenCV provides haar cascade in .xml to train the algorithm and I can detect using the coordinates of the vehicles in the sample video. So, what is the use of background subtractor then? 2) There is multiple counting of the same vehicle. For eg. If a car gets tracked in 3 consecutive frames, the count increases by 3 instead of 1. The car must be tracked till the end but counting (increment by 1 only) is to be done only when the car crosses the line of intersection. 3) I need to count the no of people and no of vehicles per min the same video. @JensBaitinger – Manan Bothra Jun 25 '17 at 05:37
  • Sorry, I do not know how to take the snapshots of the consecutive frames. @ZdaR – Manan Bothra Jun 25 '17 at 05:40
  • @MananBothra Did you find any solution of this problem "If Region of Interest (ROI) is a line then there is hardly any count. ' ? – programmers_39 Jun 29 '18 at 07:43

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