“…Among these are isovist analysis, the volume of space visible from a given point in space [ 96 ], and the application of artificial intelligence to distinguish formal categories, based on different features [ 97 ]. The recent mathematical-geometric analysis of architectural images is also noteworthy [ 98 , 99 , 100 ], through its use in architectural spaces of spatial metrics, such as edge density (number of straight and curved edges), fractal dimension (visual complexity), entropy (randomness), and colour metrics, such as hue (the dominant wavelength), saturation (the intensity of colour), and brightness (the darkness of colour). Hence, the geometric approach has not been abandoned.…”