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Toshiaki Fujii - One of the best experts on this subject based on the ideXlab platform.

  • high Speed transmission of overlay coding for road to vehicle visible light communication using led array and high Speed Camera
    Global Communications Conference, 2012
    Co-Authors: Sayaka Nishimoto, Tomohiro Yendo, Takaya Yamazato, Hiraku Okada, Toshiaki Fujii, Shintaro Arai
    Abstract:

    This paper aims to the improve the data rate for the visible light communication system using LED array and high-Speed Camera. Previously, we have proposed the decoding algorithm using inverted signals for driving situation. However, using this method the data rate become a half, because we transmit original signals and inverted signals alternately for LED array tracking. In this paper, we propose the data rate improving method for overlay coding which is coding method that overlay two data which are called as the long range data and the short range data. In the proposed method, for the long range data, we transmit original signals and inverted signals alternately. On the other hand, for the short range data, we transmit only original signals while we transmit inverted signals of long range data. We confirm that we can improve data rate as compared with the previous method.

  • overlay coding for road to vehicle visible light communication using led array and high Speed Camera
    International Conference on Intelligent Transportation Systems, 2011
    Co-Authors: Sayaka Nishimoto, Tomohiro Yendo, Takaya Yamazato, Hiraku Okada, Toshiaki Fujii, Tom Nagura, Shintaro Arai
    Abstract:

    This paper aims to improve the visible light communication system using LED array and high-Speed Camera by proposing what we call “overlay coding”. “Overlay coding” is a new coding method to realize a hierarchical coding, through which a high-priority data can be received even if the receiver is far from a transmitter. Conventionally, the hierarchical coding has been realized through the wavelet transform that has a limitation of number and disposition of LEDs, and as a result it does not always match with the design of the transmitters (e.g. traffic lights, etc.) used in real life. To solve the limitation problem, we propose a more flexible way of designing the application of LEDs depending on the transmitters. In particular, overlay coding is realized through the procedures of coding and decoding. In coding, we replace one LED with a flexible number of LEDs, and the number depends on whether the data is high-priority or low-priority, then high-priority data and low-priority data are overlaid (section III-B1). In decoding, we first obtain the high-priority data, and then the low-priority data using retrieved high-priority data (section III-B2). The experimental result shows that the distance for receiving error-free data is extended from 30m to 70m in the overlay coding (section IV-B).

  • improved decoding methods of visible light communication system for its using led array and high Speed Camera
    Vehicular Technology Conference, 2010
    Co-Authors: Toru Nagura, Tomohiro Yendo, Takaya Yamazato, Toshiaki Fujii, Masaaki Katayama, Hiraku Okada
    Abstract:

    In this paper, we consider visible light communication systems using LED array as a transmitter and high-Speed Camera as a receiver for Intelligent Transport System (ITS). Previously, we have proposed the hierarchical coding scheme which allocates data to spatial frequency components of the image depending on the priority. This scheme is possible to receive information of the high-priority even if communication distance is long. However, we need to distinguish multi-valued data from the received image by using a hierarchical coding. In this paper, we propose two improved decoding methods, and demonstrate to distinguish multi-valued data more correctly in the experiment.

  • High-Speed-Camera Image Processing Based LED Traffic Light Detection for Road-to-Vehicle Visible Light Communication
    2010
    Co-Authors: H C N Premachandra, Tomohiro Yendo, Takaya Yamazato, Hiraku Okada, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto
    Abstract:

    As one of ITS technique, a new visible light road-to-vehicle communication system at intersections is proposed. In this system, the communication between a vehicle and an LED traffic light is conducted using an LED traffic light as a transmitter, and an on-vehicle high-Speed Camera as a receiver. The LEDs in the transmitter emit light in high frequency and those emitting LEDs are captured by the high-Speed Camera for making communication. Here, the luminance value of LEDs in the transmitter should be captured in consecutive frames to achieve effective communication. For this purpose, first the transmitter should be found, then it should be tracked in consecutive frames by processing the images from the high-Speed Camera. In this paper, we propose new effective algorithms for finding and tracking the transmitter, which result in a increased communication Speed, compared to the previous methods. Experiments using appropriate images showed the effectiveness of the proposals.

  • edge based tracking of an led traffic light for a road to vehicle visible light communication system
    Journal of Korean Society for Broadcast Engineers, 2009
    Co-Authors: Chinthaka Premachandra, Tomohiro Yendo, Masayuki Tanimoto, Takaya Yamazato, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Yoshikatsu Kimura
    Abstract:

    We propose a visible light road-to-vehicle communication system at intersection as one of ITS technique. In this system, the communication between vehicle and a LED traffic light is approached using LED traffic light as a transmitter, and on-vehicle high-Speed Camera as a receiver. The LEDs in the transmitter are emitted in 500Hz and those emitting LEDs are captured by a high-Speed Camera for making communication. Here, the luminance value of each LED in the transmitter should be found for consecutive frames to achieve effective communication. For this purpose, first the transmitter should be identified, then it should be tracked for consecutive frames while the vehicle is moving, by processing the images from the high-Speed Camera. In our previous work, the transmitter was identified by getting the subtraction of two consecutive frames. In this paper, we mainly introduce an algorithm to track the identified transmitter in consecutive frames. Experimental results using appropriate images showed the effectiveness of the proposal.

Masayuki Tanimoto - One of the best experts on this subject based on the ideXlab platform.

  • High-Speed-Camera Image Processing Based LED Traffic Light Detection for Road-to-Vehicle Visible Light Communication
    2010
    Co-Authors: H C N Premachandra, Tomohiro Yendo, Takaya Yamazato, Hiraku Okada, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto
    Abstract:

    As one of ITS technique, a new visible light road-to-vehicle communication system at intersections is proposed. In this system, the communication between a vehicle and an LED traffic light is conducted using an LED traffic light as a transmitter, and an on-vehicle high-Speed Camera as a receiver. The LEDs in the transmitter emit light in high frequency and those emitting LEDs are captured by the high-Speed Camera for making communication. Here, the luminance value of LEDs in the transmitter should be captured in consecutive frames to achieve effective communication. For this purpose, first the transmitter should be found, then it should be tracked in consecutive frames by processing the images from the high-Speed Camera. In this paper, we propose new effective algorithms for finding and tracking the transmitter, which result in a increased communication Speed, compared to the previous methods. Experiments using appropriate images showed the effectiveness of the proposals.

  • edge based tracking of an led traffic light for a road to vehicle visible light communication system
    Journal of Korean Society for Broadcast Engineers, 2009
    Co-Authors: Chinthaka Premachandra, Tomohiro Yendo, Masayuki Tanimoto, Takaya Yamazato, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Yoshikatsu Kimura
    Abstract:

    We propose a visible light road-to-vehicle communication system at intersection as one of ITS technique. In this system, the communication between vehicle and a LED traffic light is approached using LED traffic light as a transmitter, and on-vehicle high-Speed Camera as a receiver. The LEDs in the transmitter are emitted in 500Hz and those emitting LEDs are captured by a high-Speed Camera for making communication. Here, the luminance value of each LED in the transmitter should be found for consecutive frames to achieve effective communication. For this purpose, first the transmitter should be identified, then it should be tracked for consecutive frames while the vehicle is moving, by processing the images from the high-Speed Camera. In our previous work, the transmitter was identified by getting the subtraction of two consecutive frames. In this paper, we mainly introduce an algorithm to track the identified transmitter in consecutive frames. Experimental results using appropriate images showed the effectiveness of the proposal.

  • Visible light road-to-vehicle communication using high-Speed Camera
    IEEE Intelligent Vehicles Symposium, Proceedings, 2008
    Co-Authors: Shinya Iwasaki, Masayuki Tanimoto, Chinthaka Premachandra, Toshiaki Fujii, Tomohiro Endo, Yoshikatsu Kimura
    Abstract:

    We have been proposing visible light road-to-vehicle communication at intersection, using LED traffic light as the transmitter and on-vehicle high-Speed Camera as the receiver. Visible light communication is a wireless communication method using luminance, transmitting data by emitting light. Thus when we use image sensor as the receiver, detection of the transmitter is required to enable the communication. In this paper, we propose transmitter detection algorithm supposed that the sequence is captured at 1000 fps. We also made experiments to verify our algorithm, using the sequence captured by a high-Speed Camera fixed on a vehicle which is running at 30 km/h.

  • feasible study of road to vehicle communication system using led array and high Speed Camera
    15th World Congress on Intelligent Transport Systems and ITS America's 2008 Annual MeetingITS AmericaERTICOITS JapanTransCore, 2008
    Co-Authors: Shintaro Arai, Tomohiro Yendo, Masayuki Tanimoto, Takaya Yamazato, Toshiaki Fujii, Shohei Mase, Yoshikatsu Kimura
    Abstract:

    This paper reports on a study of a parallel optical wireless communication systems using LED array transmitters and a high-Speed Camera as the receiver for road-to-vehicle communications in an intelligent transportation system (ITS). The authors had previously proposed a hierarchical coding scheme which allocates data to spatial frequency components depending on the priority; this scheme enables the reception of high priority data even if the receiver is far from the transmitter. They go on to describe the addition of real time information to the system, to support actual road-to-vehicle communications, and outline the results found from a driving field array using the LED array and a vehicle with a high Speed Camera. One of the problems encountered is difficulty synchronizing the timing to release the shutter with the lighting cycle of LEDs, i.e., the sampling of the data. They also report the bit error rate and confirm the reception of the data during driving.

  • experimental on hierarchical transmission scheme for visible light communication using led traffic light and high Speed Camera
    Vehicular Technology Conference, 2007
    Co-Authors: Shintaro Arai, Yoshikatsu Kimura, Masayuki Tanimoto, Takaya Yamazato, Toshiaki Fujii, S Mase, T Endo, Kiyosumi Kidono, Yoshiki Ninomiya
    Abstract:

    LEDs are expected as lighting sources for next generation, and data transmission system using LEDs attract attention. In this paper, we present hierarchical coding scheme using LED traffic lights and high-Speed Camera for intelligent transport systems (ITS) application. Further, if each of LEDs in traffic lights is individually modulated, parallel data transmissions are possible using a Camera as a reception device. Such parallel LED-Camera channel can be modeled as spatial low-pass filtered channel of which the cut-off frequency varies according to the distance. To overcome, we propose hierarchical coding scheme based on 2D fast Haar wavelet transform. As results, the proposed hierarchical transmission schemes outperform the conventional on-off keying and the reception of high priority data is guaranteed even LED-Camera distance is further.

Takaya Yamazato - One of the best experts on this subject based on the ideXlab platform.

  • high Speed transmission of overlay coding for road to vehicle visible light communication using led array and high Speed Camera
    Global Communications Conference, 2012
    Co-Authors: Sayaka Nishimoto, Tomohiro Yendo, Takaya Yamazato, Hiraku Okada, Toshiaki Fujii, Shintaro Arai
    Abstract:

    This paper aims to the improve the data rate for the visible light communication system using LED array and high-Speed Camera. Previously, we have proposed the decoding algorithm using inverted signals for driving situation. However, using this method the data rate become a half, because we transmit original signals and inverted signals alternately for LED array tracking. In this paper, we propose the data rate improving method for overlay coding which is coding method that overlay two data which are called as the long range data and the short range data. In the proposed method, for the long range data, we transmit original signals and inverted signals alternately. On the other hand, for the short range data, we transmit only original signals while we transmit inverted signals of long range data. We confirm that we can improve data rate as compared with the previous method.

  • overlay coding for road to vehicle visible light communication using led array and high Speed Camera
    International Conference on Intelligent Transportation Systems, 2011
    Co-Authors: Sayaka Nishimoto, Tomohiro Yendo, Takaya Yamazato, Hiraku Okada, Toshiaki Fujii, Tom Nagura, Shintaro Arai
    Abstract:

    This paper aims to improve the visible light communication system using LED array and high-Speed Camera by proposing what we call “overlay coding”. “Overlay coding” is a new coding method to realize a hierarchical coding, through which a high-priority data can be received even if the receiver is far from a transmitter. Conventionally, the hierarchical coding has been realized through the wavelet transform that has a limitation of number and disposition of LEDs, and as a result it does not always match with the design of the transmitters (e.g. traffic lights, etc.) used in real life. To solve the limitation problem, we propose a more flexible way of designing the application of LEDs depending on the transmitters. In particular, overlay coding is realized through the procedures of coding and decoding. In coding, we replace one LED with a flexible number of LEDs, and the number depends on whether the data is high-priority or low-priority, then high-priority data and low-priority data are overlaid (section III-B1). In decoding, we first obtain the high-priority data, and then the low-priority data using retrieved high-priority data (section III-B2). The experimental result shows that the distance for receiving error-free data is extended from 30m to 70m in the overlay coding (section IV-B).

  • improved decoding methods of visible light communication system for its using led array and high Speed Camera
    Vehicular Technology Conference, 2010
    Co-Authors: Toru Nagura, Tomohiro Yendo, Takaya Yamazato, Toshiaki Fujii, Masaaki Katayama, Hiraku Okada
    Abstract:

    In this paper, we consider visible light communication systems using LED array as a transmitter and high-Speed Camera as a receiver for Intelligent Transport System (ITS). Previously, we have proposed the hierarchical coding scheme which allocates data to spatial frequency components of the image depending on the priority. This scheme is possible to receive information of the high-priority even if communication distance is long. However, we need to distinguish multi-valued data from the received image by using a hierarchical coding. In this paper, we propose two improved decoding methods, and demonstrate to distinguish multi-valued data more correctly in the experiment.

  • High-Speed-Camera Image Processing Based LED Traffic Light Detection for Road-to-Vehicle Visible Light Communication
    2010
    Co-Authors: H C N Premachandra, Tomohiro Yendo, Takaya Yamazato, Hiraku Okada, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto
    Abstract:

    As one of ITS technique, a new visible light road-to-vehicle communication system at intersections is proposed. In this system, the communication between a vehicle and an LED traffic light is conducted using an LED traffic light as a transmitter, and an on-vehicle high-Speed Camera as a receiver. The LEDs in the transmitter emit light in high frequency and those emitting LEDs are captured by the high-Speed Camera for making communication. Here, the luminance value of LEDs in the transmitter should be captured in consecutive frames to achieve effective communication. For this purpose, first the transmitter should be found, then it should be tracked in consecutive frames by processing the images from the high-Speed Camera. In this paper, we propose new effective algorithms for finding and tracking the transmitter, which result in a increased communication Speed, compared to the previous methods. Experiments using appropriate images showed the effectiveness of the proposals.

  • edge based tracking of an led traffic light for a road to vehicle visible light communication system
    Journal of Korean Society for Broadcast Engineers, 2009
    Co-Authors: Chinthaka Premachandra, Tomohiro Yendo, Masayuki Tanimoto, Takaya Yamazato, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Yoshikatsu Kimura
    Abstract:

    We propose a visible light road-to-vehicle communication system at intersection as one of ITS technique. In this system, the communication between vehicle and a LED traffic light is approached using LED traffic light as a transmitter, and on-vehicle high-Speed Camera as a receiver. The LEDs in the transmitter are emitted in 500Hz and those emitting LEDs are captured by a high-Speed Camera for making communication. Here, the luminance value of each LED in the transmitter should be found for consecutive frames to achieve effective communication. For this purpose, first the transmitter should be identified, then it should be tracked for consecutive frames while the vehicle is moving, by processing the images from the high-Speed Camera. In our previous work, the transmitter was identified by getting the subtraction of two consecutive frames. In this paper, we mainly introduce an algorithm to track the identified transmitter in consecutive frames. Experimental results using appropriate images showed the effectiveness of the proposal.

Tomohiro Yendo - One of the best experts on this subject based on the ideXlab platform.

  • high Speed transmission of overlay coding for road to vehicle visible light communication using led array and high Speed Camera
    Global Communications Conference, 2012
    Co-Authors: Sayaka Nishimoto, Tomohiro Yendo, Takaya Yamazato, Hiraku Okada, Toshiaki Fujii, Shintaro Arai
    Abstract:

    This paper aims to the improve the data rate for the visible light communication system using LED array and high-Speed Camera. Previously, we have proposed the decoding algorithm using inverted signals for driving situation. However, using this method the data rate become a half, because we transmit original signals and inverted signals alternately for LED array tracking. In this paper, we propose the data rate improving method for overlay coding which is coding method that overlay two data which are called as the long range data and the short range data. In the proposed method, for the long range data, we transmit original signals and inverted signals alternately. On the other hand, for the short range data, we transmit only original signals while we transmit inverted signals of long range data. We confirm that we can improve data rate as compared with the previous method.

  • overlay coding for road to vehicle visible light communication using led array and high Speed Camera
    International Conference on Intelligent Transportation Systems, 2011
    Co-Authors: Sayaka Nishimoto, Tomohiro Yendo, Takaya Yamazato, Hiraku Okada, Toshiaki Fujii, Tom Nagura, Shintaro Arai
    Abstract:

    This paper aims to improve the visible light communication system using LED array and high-Speed Camera by proposing what we call “overlay coding”. “Overlay coding” is a new coding method to realize a hierarchical coding, through which a high-priority data can be received even if the receiver is far from a transmitter. Conventionally, the hierarchical coding has been realized through the wavelet transform that has a limitation of number and disposition of LEDs, and as a result it does not always match with the design of the transmitters (e.g. traffic lights, etc.) used in real life. To solve the limitation problem, we propose a more flexible way of designing the application of LEDs depending on the transmitters. In particular, overlay coding is realized through the procedures of coding and decoding. In coding, we replace one LED with a flexible number of LEDs, and the number depends on whether the data is high-priority or low-priority, then high-priority data and low-priority data are overlaid (section III-B1). In decoding, we first obtain the high-priority data, and then the low-priority data using retrieved high-priority data (section III-B2). The experimental result shows that the distance for receiving error-free data is extended from 30m to 70m in the overlay coding (section IV-B).

  • improved decoding methods of visible light communication system for its using led array and high Speed Camera
    Vehicular Technology Conference, 2010
    Co-Authors: Toru Nagura, Tomohiro Yendo, Takaya Yamazato, Toshiaki Fujii, Masaaki Katayama, Hiraku Okada
    Abstract:

    In this paper, we consider visible light communication systems using LED array as a transmitter and high-Speed Camera as a receiver for Intelligent Transport System (ITS). Previously, we have proposed the hierarchical coding scheme which allocates data to spatial frequency components of the image depending on the priority. This scheme is possible to receive information of the high-priority even if communication distance is long. However, we need to distinguish multi-valued data from the received image by using a hierarchical coding. In this paper, we propose two improved decoding methods, and demonstrate to distinguish multi-valued data more correctly in the experiment.

  • High-Speed-Camera Image Processing Based LED Traffic Light Detection for Road-to-Vehicle Visible Light Communication
    2010
    Co-Authors: H C N Premachandra, Tomohiro Yendo, Takaya Yamazato, Hiraku Okada, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto
    Abstract:

    As one of ITS technique, a new visible light road-to-vehicle communication system at intersections is proposed. In this system, the communication between a vehicle and an LED traffic light is conducted using an LED traffic light as a transmitter, and an on-vehicle high-Speed Camera as a receiver. The LEDs in the transmitter emit light in high frequency and those emitting LEDs are captured by the high-Speed Camera for making communication. Here, the luminance value of LEDs in the transmitter should be captured in consecutive frames to achieve effective communication. For this purpose, first the transmitter should be found, then it should be tracked in consecutive frames by processing the images from the high-Speed Camera. In this paper, we propose new effective algorithms for finding and tracking the transmitter, which result in a increased communication Speed, compared to the previous methods. Experiments using appropriate images showed the effectiveness of the proposals.

  • edge based tracking of an led traffic light for a road to vehicle visible light communication system
    Journal of Korean Society for Broadcast Engineers, 2009
    Co-Authors: Chinthaka Premachandra, Tomohiro Yendo, Masayuki Tanimoto, Takaya Yamazato, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Yoshikatsu Kimura
    Abstract:

    We propose a visible light road-to-vehicle communication system at intersection as one of ITS technique. In this system, the communication between vehicle and a LED traffic light is approached using LED traffic light as a transmitter, and on-vehicle high-Speed Camera as a receiver. The LEDs in the transmitter are emitted in 500Hz and those emitting LEDs are captured by a high-Speed Camera for making communication. Here, the luminance value of each LED in the transmitter should be found for consecutive frames to achieve effective communication. For this purpose, first the transmitter should be identified, then it should be tracked for consecutive frames while the vehicle is moving, by processing the images from the high-Speed Camera. In our previous work, the transmitter was identified by getting the subtraction of two consecutive frames. In this paper, we mainly introduce an algorithm to track the identified transmitter in consecutive frames. Experimental results using appropriate images showed the effectiveness of the proposal.

Hiraku Okada - One of the best experts on this subject based on the ideXlab platform.

  • high Speed transmission of overlay coding for road to vehicle visible light communication using led array and high Speed Camera
    Global Communications Conference, 2012
    Co-Authors: Sayaka Nishimoto, Tomohiro Yendo, Takaya Yamazato, Hiraku Okada, Toshiaki Fujii, Shintaro Arai
    Abstract:

    This paper aims to the improve the data rate for the visible light communication system using LED array and high-Speed Camera. Previously, we have proposed the decoding algorithm using inverted signals for driving situation. However, using this method the data rate become a half, because we transmit original signals and inverted signals alternately for LED array tracking. In this paper, we propose the data rate improving method for overlay coding which is coding method that overlay two data which are called as the long range data and the short range data. In the proposed method, for the long range data, we transmit original signals and inverted signals alternately. On the other hand, for the short range data, we transmit only original signals while we transmit inverted signals of long range data. We confirm that we can improve data rate as compared with the previous method.

  • overlay coding for road to vehicle visible light communication using led array and high Speed Camera
    International Conference on Intelligent Transportation Systems, 2011
    Co-Authors: Sayaka Nishimoto, Tomohiro Yendo, Takaya Yamazato, Hiraku Okada, Toshiaki Fujii, Tom Nagura, Shintaro Arai
    Abstract:

    This paper aims to improve the visible light communication system using LED array and high-Speed Camera by proposing what we call “overlay coding”. “Overlay coding” is a new coding method to realize a hierarchical coding, through which a high-priority data can be received even if the receiver is far from a transmitter. Conventionally, the hierarchical coding has been realized through the wavelet transform that has a limitation of number and disposition of LEDs, and as a result it does not always match with the design of the transmitters (e.g. traffic lights, etc.) used in real life. To solve the limitation problem, we propose a more flexible way of designing the application of LEDs depending on the transmitters. In particular, overlay coding is realized through the procedures of coding and decoding. In coding, we replace one LED with a flexible number of LEDs, and the number depends on whether the data is high-priority or low-priority, then high-priority data and low-priority data are overlaid (section III-B1). In decoding, we first obtain the high-priority data, and then the low-priority data using retrieved high-priority data (section III-B2). The experimental result shows that the distance for receiving error-free data is extended from 30m to 70m in the overlay coding (section IV-B).

  • improved decoding methods of visible light communication system for its using led array and high Speed Camera
    Vehicular Technology Conference, 2010
    Co-Authors: Toru Nagura, Tomohiro Yendo, Takaya Yamazato, Toshiaki Fujii, Masaaki Katayama, Hiraku Okada
    Abstract:

    In this paper, we consider visible light communication systems using LED array as a transmitter and high-Speed Camera as a receiver for Intelligent Transport System (ITS). Previously, we have proposed the hierarchical coding scheme which allocates data to spatial frequency components of the image depending on the priority. This scheme is possible to receive information of the high-priority even if communication distance is long. However, we need to distinguish multi-valued data from the received image by using a hierarchical coding. In this paper, we propose two improved decoding methods, and demonstrate to distinguish multi-valued data more correctly in the experiment.

  • High-Speed-Camera Image Processing Based LED Traffic Light Detection for Road-to-Vehicle Visible Light Communication
    2010
    Co-Authors: H C N Premachandra, Tomohiro Yendo, Takaya Yamazato, Hiraku Okada, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto
    Abstract:

    As one of ITS technique, a new visible light road-to-vehicle communication system at intersections is proposed. In this system, the communication between a vehicle and an LED traffic light is conducted using an LED traffic light as a transmitter, and an on-vehicle high-Speed Camera as a receiver. The LEDs in the transmitter emit light in high frequency and those emitting LEDs are captured by the high-Speed Camera for making communication. Here, the luminance value of LEDs in the transmitter should be captured in consecutive frames to achieve effective communication. For this purpose, first the transmitter should be found, then it should be tracked in consecutive frames by processing the images from the high-Speed Camera. In this paper, we propose new effective algorithms for finding and tracking the transmitter, which result in a increased communication Speed, compared to the previous methods. Experiments using appropriate images showed the effectiveness of the proposals.

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