  The aim of this paper is to present an integrated system consisted of a RGB-D
camera and a software able to monitor shoppers in intelligent retail
environments. We propose an innovative low cost smart system that can
understand the shoppers' behavior and, in particular, their interactions with
the products in the shelves, with the aim to develop an automatic RGB-D
technique for video analysis. The system of cameras detects the presence of
people and univocally identifies them. Through the depth frames, the system
detects the interactions of the shoppers with the products on the shelf and
determines if a product is picked up or if the product is taken and then put
back and finally, if there is not contact with the products. The system is low
cost and easy to install, and experimental results demonstrated that its
performances are satisfactory also in real environments.
