Directable data transmission with digital lighting and camera

该研究开发了在智能手机等移动互联网设备上安装数码相机的数据通信系统。它通过解码电影中不同颜色强度的模式来读取嵌入的数据，这些图像捕捉到被彩色LED灯泡照亮的物体。我们的发射器根据编码数据有意地控制led的颜色，以传递相关信息，接收器通过使用普通图像传感器检测其变化来解码，通过这种方式，可以在适当的环境条件下取代现有的二维码或近场通信等技术。这项技术不需要能够调制或感应高频可见光的特殊设备，这在现有的可见光通信中使用。我们的系统可以与商用智能手机和数字可控彩色LED照明一起实现，适合以极低的成本开发通信设备。

This research developed a data communication system with a digital camera equipped on a mobile internet devices such as smartphones. It reads embedded data by decoding the patterns of varying color intensities from the movies that capture objects lightened by color LED bulbs.Our transmitter intentionally controls the colors of the LEDs according to the encoded data for delivering relevant information, and a receiver decodes it by detecting their variations with ordinary image sensors, by which existing technologies such as two-dimensional codes or near field communication can be replaced for appropriate environmental conditions.This technology requires no special devices capable for modulating or sensing visible lights at high frequencies, which used in existing visible lighting communications. Our system can be implemented with commercial smartphones and digitally controllable color LED lightings, which is suited to develop communication devices at very low cost.