System and methods for tracking transaction flow through a customer service area. The present invention provides automated, non-intrusive tracking of individuals, based on a series of still image frames obtained from one or more colour sensors. Images of individuals are extracted from each frame and the datasets resulting from the cropped images are compared across multiple frames. The datasets are grouped together into groups called “tracklets”, which can be further merged into “customer sets”. Various pieces of metadata related to individuals' movement (such as customer location and the duration of each transaction state) can be derived from the customer sets. Additionally, individual images may be anonymized into mathematical representations.