Method for automatically assessing the quality of a dispensed beverage

A method automatically evaluates the quality of milk foam dispensed by a machine for dispensing milk-based beverages through the analysis of an image of the free surface of the frothed milk contained in a container, wherein the analysis uses automatic procedures for processing images for identifying and quantifying, in the processed image, a physical characteristic representative of the texture of the surface of the frothed milk and hence indicative of the quality of milk foam, the physical characteristic being the plurality of air bubbles.