Exploiting the location-awareness of our system, it is possible to greatly reduce the computational requirements of the matching process and increase its accuracy. This is done by analyzing the localization information obtained by the BLE infrastructure. The current frame is matched against the templates of the artworks that belongs to the room where the user currently is. It is worth noting that the image recognition algorithm also aims at significantly preserve the energy of the wearable device. Indeed, on the one hand, the BLE technology requires a very low communication power; on the other hand, the savings in terms of computational effort allows a further reduction of power consumption. A summarization of the painting recognition method is presented in Fig. 3.