Detecting Cars in a Video of Traffic

This example shows how to detect cars in a video of traffic. You can use Image Processing Toolbox™ to visualize and analyze videos or image sequences. This example uses VideoReader (MATLAB®), implay, and other Image Processing Toolbox functions to detect light-colored cars in a video of traffic. Note that VideoReader has platform-specific capabilities and may not be able to read the supplied Motion JPEG2000 video on some platforms.
	
Step 1: Access Video with VideoReader
The VideoReader function constructs a multimedia reader object that can read video data from a multimedia file. See the documentation for VideoReader for information on which formats are supported on your platform. Use VideoReader to access the video and get basic information about it.
trafficVid = VideoReader('traffic.mj2')
trafficVid = 
  VideoReader with properties:
   General Properties:
            Name: 'traffic.mj2'
            Path: '/mathworks/devel/bat/BR2016ad/build/matlab/toolbox/imag...'
        Duration: 8
     CurrentTime: 0
             Tag: ''
        UserData: [ ]
   Video Properties:
           Width: 160
          Height: 120
       FrameRate: 15
    BitsPerPixel: 24
     VideoFormat: 'RGB24'
The get method provides more information on the video such as its duration in seconds.
get(trafficVid)
obj = 
  VideoReader with properties:
   General Properties:
            Name: 'traffic.mj2'
            Path: '/mathworks/devel/bat/BR2016ad/build/matlab/toolbox/imag...'
        Duration: 8
     CurrentTime: 0
             Tag: ''
        UserData: [ ]
   Video Properties:
           Width: 160
          Height: 120
       FrameRate: 15
    BitsPerPixel: 24
     VideoFormat: 'RGB24'