Artificial olfaction  was introduced  as a model tool  to investigateolfaction  properties  [1]. Nonetheless,   the  only  analogy  between the natural and the artificial system lies just in the selectivity proper- ties of the receptors. The implementation of more sophisticated fea- tures such as the large number of receptors and the glomerular layer have been hampered  by technical difficulties related to the manage- ment of large numbers  of simultaneous  signals.As demonstrated in the past, optical imaging is a read-out  tech- nique for sensors development that can provide large sensor arrays [2]. On that basis, we recently introduced  an artificial olfaction sys- tem based on the imaging of a continuous layer of chemical indi- cators [3]. In this situation an image sensor provides a segmentation of the whole sensing layer in a number  of elementary  units corre- sponding to the pixels of the image. Eventually, since it is possible to …