Spectral Fingerprinting on a Standard Mobile Phone

Figure 2

(a) Intended measuring configuration, with a mobile phone screen held by hand in front of a sensing device. Detail of the sensor layout used to test the identification capabilities of the system and details of the alignment. (b) Example of captured images using the image centered (IC) and dynamic centering (DC) alignments for $z\mathrm{\hspace{0.17em}\hspace{0.17em}}=\mathrm{\hspace{0.17em}\hspace{0.17em}}95$ mm as seen by a snapshot acquisition and in video mode (viewing field marked with dashed squares).

(a)

(b)