Chen Shih-Hao, Chow Chi-Wai
Opt Express. 2014 Dec 15;22(25):30713-8. doi: 10.1364/OE.22.030713.
A novel color-filter-free visible-light communication (VLC) system using red-green-blue (RGB) light emitting diode (LED) and mobile-phone camera is proposed and demonstrated for the first time. A feature matching method, which is based on the scale-invariant feature transform (SIFT) algorithm for the received grayscale image is used instead of the chromatic information decoding method. The proposed method is simple and saves the computation complexity. The signal processing is based on the grayscale image computation; hence neither color-filter nor chromatic channel information is required. A proof-of-concept experiment is performed and high performance channel recognition is achieved.
首次提出并演示了一种使用红绿蓝（RGB）发光二极管（LED）和手机摄像头的新型无滤色器可见光通信（VLC）系统。针对接收到的灰度图像，使用了一种基于尺度不变特征变换（SIFT）算法的特征匹配方法，而不是色度信息解码方法。该方法简单且节省计算复杂度。信号处理基于灰度图像计算；因此既不需要滤色器也不需要色度通道信息。进行了概念验证实验并实现了高性能的信道识别。
