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.
|Title of host publication||2021 International Conference on Electronics, Information, and Communication, ICEIC 2021|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Publication status||Published - 2021 Jan 31|
|Event||2021 International Conference on Electronics, Information, and Communication, ICEIC 2021 - Jeju, Korea, Republic of|
Duration: 2021 Jan 31 → 2021 Feb 3
|Name||2021 International Conference on Electronics, Information, and Communication, ICEIC 2021|
|Conference||2021 International Conference on Electronics, Information, and Communication, ICEIC 2021|
|Country/Territory||Korea, Republic of|
|Period||21/1/31 → 21/2/3|
Bibliographical noteFunding Information:
This work is supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2019R1A2C1005834).
© 2021 IEEE.
- 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