Abstract
Digital signage is widely distributed nowadays and makes attractive advertisements or effective communicating information possible. Users can retrieve the details of displayed information by smartphones which have been widely distributed, too. However, such retrieval is time-consuming. Moreover, the retrieved information is sometimes wrong. Therefore it is desirable that the details are directly obtained from videos on signage. URLs or QR codes are used for such purpose in case of printed materials, but are not suitable in case of videos because they should continue to be displayed in enough time to be read by smartphones. Then, now we implement a suitable digital watermarking system as the application of smartphone for extracting watermark from videos on signage in real-time. The experimental results report a new information that the application can obtain correct watermarks in approximately 743ms from the optimal visual distance.
