Tracking clustered object missing

[hwk06023]

We followed all the steps mentioned and in step6: running kf_tracker ROS node has been successfully executed in rviz. We connected to realsense d435i and visualized point clouds in real time. However, we did not see any objects being tracked as shown in the demo sample file of the current github repository. So one thing we tried was editing the main.cpp file located in multiple-object-tracking-lidar/src/main.cpp.(we simply added several cout command lines) After edit we compiled and built the package and executed the kf_tracker node again. Yet, none of the edits seem to affect the execution. We thought editing the main.cpp would solve the problem but now we are out of answers. To summarize, our question is how can we visualize tracked clustered data in real time with realsense d435i. Please let us know if we are missing anything.

Thank you in advance