Estimating the Size of a Crowd with OpenCV and a Raspberry Pi 4 2, image processing with opencv and RPi4, opencv RPi4, Rpi4 openCV, crowd size with RPi4, crowd size with image processing, crowd size with opencv Welcome to the next tutorial on our raspberry pi four python programming. In the previous article, we built a system that recognizes when two people are in physical contact using OpenCV and a Raspberry Pi 4. We used the weights from the YOLO version 3 Object Recognition Algorithm to implement the De ....