The bee is an essential species for the pollination of many crops; its abnormally high extinction rate is therefore particularly worrying. Domestic bee populations are being carefully observed to identify the reason for this decline. In this context, video hive monitoring aims to enable real-time monitoring while avoiding laborious human labour. We’ll Bee is a start-up seeking to automate certain hive monitoring processes. A tool used to count the number of entries and exits of bees to the hive already exists. The subject of this internship is the improvement of this system in order to determine the proportion of bees bringing pollen back to the hive.