LED-to-Camera Communication in Mobile Scenarios

Abstract

There are increasing applications of Visible Light Communication, and LED-to-Camera communication is one of the promising research directions. In this paper, we explore LED-to-Camera communication in mobile scenarios based on the rolling shutter effect to get higher data transmission rate. Movement causes the deformation of the overall shape of the LED in the captured image. And stripes close to the LED edges are too dark to be detected. Both affect the data detection by utilizing the rolling shutter effect. A method is proposed that can increase the transmission rate, which solves the problems caused by movement and darkness of stripes that close to the LED cover edges. After processing, the region of interest is recouped, i.e., the processing range used to detect the rolling shutter stripes becomes larger, which contains more complete data. An approach to detect stripe edges by converting pixel information into binary signal is proposed, which is used to solve the problem of undetectable stripe edges due to high frequency. The proposed method is evaluated through experiments under different conditions. The results demonstrate that the method is effective for addressing the challenges of LED-to-camera communication in mobile scenarios.