Spatial frequency modulation for display-camera communication

Seung Su Ryu, Kyu Ho Lee, Ji Sang Bae, Jong Ok Kim

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    Display-camera communication (DCC) is one of visible light communication (VLC) techniques using an LED display and a camera. Conventional methods hide data bits by dynamically changing luminance intensity of image blocks. However, this approach still suffers from noticeable flickering artifacts. In this paper, we proposed a novel spatial frequency modulation method for display-camera communication. The proposed method hides a bit by modulating spatial frequency of an image block, which is actually implemented by blurring and sharpening. Discrete Cosine Transform (DCT) is applied to an image block, and its high frequency coefficients are either boosted (sharpened) or zero-padded (blurred). Experimental results demonstrate that the proposed method can achieve larger throughput and higher transmission accuracy, compared to the existing luminance methods.

    Original languageEnglish
    Title of host publication2021 International Conference on Electronics, Information, and Communication, ICEIC 2021
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)9781728191614
    DOIs
    Publication statusPublished - 2021 Jan 31
    Event2021 International Conference on Electronics, Information, and Communication, ICEIC 2021 - Jeju, Korea, Republic of
    Duration: 2021 Jan 312021 Feb 3

    Publication series

    Name2021 International Conference on Electronics, Information, and Communication, ICEIC 2021

    Conference

    Conference2021 International Conference on Electronics, Information, and Communication, ICEIC 2021
    Country/TerritoryKorea, Republic of
    CityJeju
    Period21/1/3121/2/3

    Bibliographical note

    Funding Information:
    This work is supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2019R1A2C1005834).

    Publisher Copyright:
    © 2021 IEEE.

    Keywords

    • DCT coefficient
    • Display-Camera Communication (DCC)
    • Spatial Frequency Modulation
    • Visible Light Communication (VLC)

    ASJC Scopus subject areas

    • Artificial Intelligence
    • Computer Networks and Communications
    • Information Systems
    • Information Systems and Management
    • Electrical and Electronic Engineering
    • Instrumentation

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