The image acquisition is performed through an Odroid USB-cam 720p, which has a resolution of 1280*720 HD, an USB 2.0 plug-and-play interface and supports up to 30 fps. Fig. 5 shows the hardware used to realize the wearable device. The device that receives and processes the cultural content sent by the processing center when there is a large number of visitors has been realized through a Raspberry Pi Model B [24]. It is equipped with 512 MB of RAM and is based on the Broadcom BCM2835 system with a chip (SoC) that includes an ARM1176JZF-S 700 MHz processor and a VideoCore IV GPU. Furthermore, the system has MicroSD sockets for boot media and persistent storage. The Raspberry Pi board is connected to an interactive wall in order to display the cultural contents received by the processing center. Same boards were also exploited to realize the BLE landmarks that make up the indoor localization infrastructure.