matt27110's profile - activity

I forgot one thing : you must know your frame size before :

"writer.open("test.avi", -1 ,20 ,frame.size())"

Otherwise you can't record your video.

VideoWriter writer;
cap >> frame;
writer.open("test.avi", -1 ,20 ,frame.size());

You show nothing, you created a window but you don't display the image. Just add : imshow("MyVideo", frame);

Hello everyone !

I'm using HOG and DPM to track multiple targets and among these targets I want to track just one. Multi-targets tracking is pretty easy but track only one person among them is ... harder.

For example : I would like to draw a red box for the person at the left on the below image without changing the other boxes.

Have you any ideas ?

Thank you for your help !

Thank you it works !!!

Hello everyone !

I'm having problems with the KeypointBasedMotionEstimator class.

I don't understand how to instanciate that class. The constructor is :

KeypointBasedMotionEstimator(Ptr<MotionEstimatorBase> estimator)

And this is my main :

int main(int argc, char **argv)
{
  MotionModel mm = MM_AFFINE;
  Ptr<MotionEstimatorBase> estimator;
  estimator->setMotionModel(mm);
  KeypointBasedMotionEstimator kbme = KeypointBasedMotionEstimator(estimator);

  return 0; 
}

I get "segmentation fault (core dumped)"

I think the error comes from Ptr<MotionEstimatorBase> estimator , my initialization is probably bad and I'm not familiar with abstract class.

Any ideas is welcome.

Thank you in advance !!