You can reach Jetson TX2 Intallation in here
$ sudo apt-get update && upgrade
$ sudo apt-get install python3-pip
$ pip3 install opencv-python==4.5.4.60
** Check installation OpenCV
$ python3
>>import cv2
>>cv2.__version__
'4.5.4'
$ pip3 install opencv-contrib-python==4.5.4.60
$ pip3 install datetime
$ cd /home/moveonboxer/tracker/single_object_tracker
$ python3 single_object_tracker.py
$ cd /home/moveonboxer/tracker/multi_object_tracker
$ python3 multi_object_tracking.py
**Press 'T' for capture the object **Press 'Space' for start tracking