Messages behind the sound
Qian Wang, Kui Ren, Man Zhou, Lei Tao, Dimitrios Koutsonikolas, Lü Su · 2016
With the ever-increasing use of smart devices, recent research endeavors have led to unobtrusive screen-camera communication channel designs, which allow simultaneous screen viewing and hidden screen-camera communication. Such practices, albeit innovative and effective, require well-controlled alignment of camera and screen and obstacle-free access.