  Statistical methods are usually applied in the processing of digital images
for the analysis of the textures displayed by them. Aiming to evaluate the
urbanization of a given location from satellite or aerial images, here we
consider a simple processing to distinguish in them the 'urban' from the
'rural' texture. The method is based on the mean values and the standard
deviations of the colour tones of image pixels. The processing of the input
images allows to obtain some maps from which a quantitative evaluation of the
textures can be obtained.
