1. A process of identifying a shadow in a digital image, the digital image comprising a set of image points that can be located in a plane of said image, each image point being associated with a color and brightness, the color being defined by chromatic components that are locatable in a color space of an acquisition system, the brightness being determinable from said chromatic components, wherein for each image point the process comprises the steps of, determining a brightness; performing a color standardization to provide standardized chromatic components r, g, b; determining a chromatic brightness from the standardized chromatic components r, g, b; and comparing the chromatic brightness with the brightness of each image point to identify a presence of a shadow on a relevant image point.