OpenCV Bot is actually used for detecting or tracking any real time object via image processing. This app can detect any object using its color and it creates X, Y position and Area in your phone screen, with this app the data is sent to the microcontroller via Bluetooth. It has been tested with the HC-05 & HC-06 Bluetooth module and should work for a wide range of devices.

Sample Arduino Code:
https://github.com/chayanforyou/OpenCVBot-Arduino

You can see the tutorial:
https://youtu.be/tYZ5nuR4GLU