C++ Demo - Object Tracking (VitTrack)

[ryan1288]

This PR adds the C++ demo for the Object Tracking VitTrack model, as part of a request from #135.

• demo.cpp: Added to have matching functionality to the demo.py, text offsets in both versions were adjusted to prevent overlap and improve clarity.
• demo.py: Updated to use save and vis flags for optional saving (disabled by default) and visualization (enabled by default) functionality.
• CMakeLists.txt: Created to build with OpenCV 4.9.0 and enforces C++11 standards upon building.
• README.md: Updated with C++ instructions.

The interface matches other C++ demos within the set of ML models.

Average 100+ FPS on my laptop (AMD Ryzen 7 5800H) for a (640 x 480) webcam feed. FPS is slightly higher on a (1273 x 733) input video, see testing example below.

Testing

• Run demo using webcam

cmake -B build -D OPENCV_INSTALLATION_PATH=/path/to/opencv .
cmake --build build
./build/opencv_zoo_object_tracking_vittrack

• Run demo using input video

cmake -B build -D OPENCV_INSTALLATION_PATH=/path/to/opencv .
cmake --build build
./build/opencv_zoo_object_tracking_vittrack -i=dog.mp4

[ryan1288]

@fengyuentau I noticed that the "save" functionality should be optionally enabled to save an output .mp4 with the tracking bounding box. This is currently neither available in the Python demo nor the new C++ demo. I'll add that functionality to both C++ and Python in a different PR. Other models may have the same problem so I'll add it to them as well.

[fengyuentau]

Seems like both of them are not used anywhere.

[ryan1288]

They are now used! 👍 In both C++ and Python.

[fengyuentau]

@fengyuentau I noticed that the "save" functionality should be optionally enabled to save an output .mp4 with the tracking bounding box. This is currently neither available in the Python demo nor the new C++ demo. I'll add that functionality to both C++ and Python in a different PR. Other models may have the same problem so I'll add it to them as well.

Ok, it would be like to have this fuctionality implemented.

[ryan1288]

@fengyuentau I noticed that the "save" functionality should be optionally enabled to save an output .mp4 with the tracking bounding box. This is currently neither available in the Python demo nor the new C++ demo. I'll add that functionality to both C++ and Python in a different PR. Other models may have the same problem so I'll add it to them as well.

Ok, it would be like to have this fuctionality implemented.

The functionality is added 💯 Saving works for both input videos and camera feed with matching FPS.

[fengyuentau]

👍 LGTM