OpenCV: How to use HOGDescriptor::detect method?

Question

I have succeeded in tracking moving objects in a video.

Answer 1

• If you don't cmake OpenCV with CUDA enabled, calling gpu::HOGDescriptor::detect will be equal to call HOGDescriptor::detect. No GPU is called.

• Also for code, you can use

  GpuMat img;
  vector found_locations;
  gpu::HOGDescriptor::detect(img, found_locations);
  if(!found_locations.empty())
  {
      // img contains/is a real person 
  }
  

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Edit:

However I want to decide if an object is person or not.

I don't think that you need this step. HOGDescriptor::detect itself is used to detect people, so you don't need to verify them as they are supposed to be people according to your setup. On the other hand, you can setup its threshold to control its detected quality.