Abstract
In a vehicular visible light communication system, the visible light signals are obtained from a series of image frames showing LEDs as a transmitter which are captured by a high-speed camera as a receiver. However, when two LEDs overlap in the captured image, some serious problems related to data transmission arise, such as high data loss and bit-error-rate. To resolve these problems, in this paper, a method comprising three main steps for separating the overlapping LEDs is proposed. First, according to LED luminance, the edges of the LEDs are detected by applying an improved Canny edge detector algorithm. Then these edges are used to extract all the contours of the two overlapping LEDs. Finally, a derivative of the generalized Hough transform algorithm is utilized to distinguish each LED from the overlapping region according to the obtained LED contours. The performance of the proposed algorithm under different parametric conditions in real situations is analyzed according to the results of experiments conducted in an outdoor environment.
Highlights
Visible light communication (VLC) is a newly emerging technology that, when applied to the traffic system, is termed Vehicular Visible Light Communication (V2LC)
V2LC prevents mutual signal interference, in high-density traffic. These advantages allow V2LC to play an important role in the Intelligent Transportation System (ITS), an innovative advanced application aimed at providing a better, safer transportation network, in which traffic accidents and congestion are effectively reduced
It should be noted that the primary goal of this study was Light Emitting Diodes (LEDs) detection to handle cases when LEDs overlap, and we assume that the input as the series of frames is taken from the LEDs’ first appearance until they overlap
Summary
Visible light communication (VLC) is a newly emerging technology that, when applied to the traffic system, is termed Vehicular Visible Light Communication (V2LC). V2LC uses Light Emitting Diodes (LEDs) to transmit data to a photodiode or an on-vehicle high-speed camera in vehicle-tovehicle or vehicle-to-infrastructure communication [1]–[3]. In comparison to other connected vehicle technologies, for example, Dedicated Short Range Communication [4], [5], V2LC offers greater bandwidths, low deployment costs, low complexity, and a high data rate. V2LC prevents mutual signal interference, in high-density traffic. These advantages allow V2LC to play an important role in the Intelligent Transportation System (ITS), an innovative advanced application aimed at providing a better, safer transportation network, in which traffic accidents and congestion are effectively reduced. The V2LC system uses the vehicular LEDs (front, tail LED lamps and daytime running light) as the transmitter and the on-vehicle high-speed camera as the
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
