The Raspberry Pi 4 is the most powerful Raspberry Pi to date, with it packing enough reserves to be used for machine learning. Now, you can put the popular SBC to use for automatically detected objects using TensorFlow Lite.
https://www.notebookcheck.net/Raspberry-Pi-New-project-puts-the-popular-single-board-computer-to-use-for-AI-object-recognition-with-TensorFlow.458938.0.html
where the source because the webpage ask to me password and user name :-\ >:(