Error Creating Object tracking pointer with OpenCV

Question

Please i need help I am having an error when i try creating a pointer for object tracking with opencv

cv::Ptr<cv::Tracker> tracker = cv::TrackerKCF::create();

The error says:

TrackerKCF is not a member of CV.

I have checked the opencv documentation on objecttracking and i included the neccesary header. I am stuck.

The different header I included includes:

#include <opencv2/highgui.hpp>
#include <opencv2/imgproc.hpp>
#include <opencv2/imgcodecs.hpp>
#include <opencv2/objdetect.hpp>
#include <opencv2/video/tracking.hpp>
#include <iostream>

I have tried creating pointer for other object tracking algorithm according to OpenCV

cv::Ptr<cv::Tracker> tracker = cv::TrackerMOSSE::create();
cv::Ptr<cv::Tracker> tracker = cv::TrackerCSRT::create();

I received same Error

Answer 1

This works for me:

#include <opencv2/tracking.hpp>
#include <opencv2/tracking/tracking_legacy.hpp>

int main()
{
  auto tracker = cv::legacy::TrackerMOSSE::create();
  cv::Ptr<cv::Tracker> tracker2 = cv::TrackerCSRT::create();
}

Note that TrackerMOSSE has been moved to "legacy" a long time ago (OpenCV 4.5.1).

Generally, everything is well documented, e.g. https://docs.opencv.org/4.8.0/d2/da2/classcv_1_1TrackerCSRT.html, for CSRT, just chose the proper OpenCV version in the combo box and use the search widget.