| Authors |
Y. Kawai, T. Yamazato, H. Okada, T. Fujii, T. Yendo, S. Arai, K. Kamakura |
| Title |
Tracking of LED headlights considering NLOS for an image sensor based V2I-VLC |
| Authority |
International Conference and Exhibition on Visible Light Communications (ICEVLC) |
| Summary |
This paper focuses on image sensor based
vehicle-to-infrastructure visible light communication (V2IVLC)
for Intelligent Transport Systems (ITSs). Because
the image sensor can spatially separate multiple or noise
sources, its receiver can simultaneously demodulate multiple
sources. Thus, we consider multiple source reception
from multiple vehicles. In image sensor based VLC, the
transmitted data are received by extracting the luminance
corresponding to the VLC transmitter from the captured
image. Transmitter detection and tracking are an important
requirement of these systems but are degraded
by occlusion, which causes non-line of sight (NLOS). We
focus on tracking of transmitters that may be occluded by
moving vehicles in V2I-VLC. Our proposed method detects
multiple LED headlights by combining a background
difference method with an LED detection method based
on time and space gradients. We also propose a tracking
method based on optical flow-based tracking, which
handles occlusion by linear or second-curve interpolation.
The proposed methods were evaluated by a high-speed
camera placed by the roadside. The false-positive and falsenegative
tracking rates were 6.25% and 3.32%, respectively,
at κ = 60 (where κ defines the permissible error in the
optical flow). |
| 年月 |
2015年10月 |
| DOI/Handle |
|
| 開催場所 |
Yokohama, Japan |
| 研究テーマ |
可視光通信／光無線通信
高度交通システム（ＩＴＳ）
|
| 言語 |
英語 |
| 原稿/プレゼン資料 |
 /  (ローカル限定) |
