Pedestrian Detection in CSharp

System Requirement

Component	Requirement	Detail
Emgu CV	Version 2.0.1.0	Available from SVN only
Operation System	Cross Platform

Source code

      static void Run()
      {
         Image<Bgr, Byte> image = new Image<Bgr, byte>("pedestrian.png");

         Stopwatch watch = Stopwatch.StartNew();
         Rectangle[] regions;

         //check if there is a compatible GPU to run pedestrian detection
         if (GpuInvoke.HasCuda) 
         {  //this is the GPU version
            using (GpuHOGDescriptor des = new GpuHOGDescriptor())
            using (GpuImage<Bgr, Byte> gpuImg = new GpuImage<Bgr,byte>(image))
            using (GpuImage<Bgra, Byte> gpuBgra = gpuImg.Convert<Bgra, Byte>())
            {
               des.SetSVMDetector(GpuHOGDescriptor.GetDefaultPeopleDetector());
               regions = des.DetectMultiScale(gpuBgra);
            }
         }
         else
         {  //this is the CPU version
            using (HOGDescriptor des = new HOGDescriptor())
            {
               des.SetSVMDetector(HOGDescriptor.GetDefaultPeopleDetector());
               regions = des.DetectMultiScale(image);
            }
         }
         watch.Stop();

         foreach (Rectangle pedestrain in regions)
         {
            image.Draw(pedestrain, new Bgr(Color.Red), 1);
         }

         ImageViewer.Show(
            image,
            String.Format("Pedestrain detection using {0} in {1} milliseconds.", 
               GpuInvoke.HasCuda ? "GPU" : "CPU", 
               watch.ElapsedMilliseconds));
      }

Result

Pedestrian Detection