Hand-waving decodable steganography by use of 960Hz LED panel
Kengo Sato, Shiro Suyama, Hirotsugu Yamamoto · 2013
Digital signage become pervasive everywhere. Each signage required of drawing more attentions. We developed 480Hz LED display [1] and utilized the LED display to provide a kind of enjoyment in decoding a steganography. The proposed steganography is hand-waving decodable [2]. However, there was an unintentional decoding problem, that is, observers perceived the embedded information without hand waving. They perceive the silhouette when viewing the LED screen with fast head movements. This problem may be solved by increasing the switching rate of the LED panel.