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1 (JBE Vol. 23, No. 5, September 2018) (Regular Paper) 23 5, (JBE Vol. 23, No. 5, September 2018) ISSN (Online) ISSN (Print) a), a) The Rotating Multiple Display Signage System Ye-Jin Kang a) and Goo-Man Park a).. ROI.,.. Abstract Recently, the digital signages display not only the rectangular shapes but also the various shapes and sizes. The high-resolution large-screen display monitors have evolved to multi-vision modes in which several screens are connected to one another. In this paper, we present the structure of an atypically shaped signage system in which the ROI changes with the rotation of the multiple displays. The inclination angle of the monitor is calculated by taking the output value of the gyro sensor inter-locked with the Arduino, and an image in which the position of the four corners is varied according to the rotation angle by using the polar coordinate system. In order to display images in the multi-screen environment, multiple displays with a gyro sensor were controlled using serial communication. As the result, we have obtained the flexibly moving monitor systems with associated images fitting in them. Keyword : Digital Signage, Multi-monitor display, rotating display a) IT (Dept. of Electronics IT Media Engineering, Seoul National Univ. of Science and Technology) Corresponding Author : (Gooman Park) gmpark@seoultech.ac.kr Tel: ORCID: This study was supported by the Research Program funded by the SeoulTech(Seoul National University of Science and Technology) Manuscript received February 6, 2018; Revised July 30, 2018; Accepted, July 30, Copyright 2016 Korean Institute of Broadcast and Media Engineers. All rights reserved. This is an Open-Access article distributed under the terms of the Creative Commons BY-NC-ND ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited and not altered.

1 : (Ye-Jin Kang et al.: The Rotating Multiple Display Signage System). (digital signage), [1].,, [2]. [3]., [4]. 1.,,. [5]. [6]. [10],.. 1. 2.

2 1 : (Ye-Jin Kang et al.: The Rotating Multiple Display Signage System). (digital signage), [1].,, [2]. [3]., [4]. 1.,,. [5]. [6]. [10], Yaw. (polar coordinates system) (image coordinates system)., ROI. ROI(Region of Interest). 1. Fig 1. Example of atypical multiple display signage

3 (JBE Vol. 23, No. 5, September 2018) 2. Fig 2. The Rotating Multiple Display Signage block diagram, [7]. Yaw.. 2.,. (Pixel image coordinates system) Fig 3. Polar coordinates and image coordinate system [8]. 3, x, y.

4 1 : (Ye-Jin Kang et al.: The Rotating Multiple Display Signage System).,., ( ) ( ) ( ) cos sin.. Yaw (tan ) (arctan ) (thread) CPU, [9]. 5 (Multi thread). (Single thread),..,. 5. Fig 5. Multi-threading of arduino 4. Fig 4. Process of converting coordinates system A' C', B' D' 5. Window 10, OpenCV Library ,

5 4 6 0 방송공학회논문지 제23권 제5호, 2018년 9월 (JBE Vol. 23, No. 5, September 2018) 그림 6. 회전 각도에 따른 디스플레이 영상 Fig 6. Display image according to rotation angle 키 적으로 회전시 면 실시간으로 자이로 센서의 각속도 값을 플레이를 제어하는 등의 응용 분야를 기대할 수 있다. 출력하여 회전각을 계산한다. 이 회전각으로 극좌표계상에 있는 가상의 외접원과 디스플레이의 교점에서 이동한 좌표 참 고 문 헌 (References) 값을 계산한 후 영상좌표계로 변환한다. 이 네 꼭짓점의 값 키 을 디스플레이에 적용시 면 그림 6과 같이 디스플레이의 회전 각도(0, 15, 80, 30 )에 따라 회전형 멀티 디스플레이 사이니지가 표출되는 것을 확인할 수 있다. Ⅲ. 결 론 본 논문에서는 회전형 멀티 디스플레이 사이니지 시스템 을 제안하였다. 회전형 멀티 디스플레이 사이니지 시스템 은 디스플레이가 회전하는 경우 부착된 자이로 센서에서 회전 각도를 극좌표계에 나타내어 디스플레이 꼭짓점의 좌 표 값을 계산한다. 멀티 디스플레이에 부착된 자이로 센서 는 각각 다른 값을 불러오므로 독립적으로 계산할 수 있다. 회전 각도에 따라 디스플레이의 좌표 값을 계산하고 이를 함 써 정형화된 직사각형의 디스플레이뿐만 아니 표출 으로 라 다각형 형태의 디스플레이에도 적용할 수 있다. 향후 연구 과제로는 3차원상에서 자이로 센서의 z축 값 을 측정하고 가속도 센서나 칼만 필터를 추가적으로 사용 함으로써 오차를 보상할 수 있는 알고리즘을 연구할 예정 이다. 차후 유동적인 중심점의 UHD 영상을 표출하거나 멀 티 터치 스크린, UI/UX에 접목시켜 제스처 인식으로 디스 [1] S. Lee, I. Shin, N. Lee, and H. Lee, Atypical Screen Digital Signage Technology, TTA Journal, catimage=1&dir=51&start=38 (accessed March 2017). [2] I. Shin, S. Lee, Y. Lee, N. Lee, and H. Lee, A Study on the Moving Screen Signage system, J-KICS, Vol.42, No.1, pp , January [3] H. Jung, "Trends of Technology and Industry for Digital Signage to Support High Quality Resolution", 2014 Electronics and Telecommunications Trends, page 73, February [4] G. Kang, "Digital Signage Standardization Trend", Jounal of Telecommunications and Network(JCN), 30(8), page76, July [5] Y. Jung, Case Analysis of Multi Display and A Study on Management Interface, Journal of Korea Design Knowledge, Vol.18, pp , June [6] A. Lee Recent trends and developments in digital signage", ICT Spot Issue, Vol. 04, May [7] I. Shin, S. Lee, E. Lee, N. Lee, and H. Lee, "S/W Based Frame-Level Synchronization for Irregular Screen Processing System", ETRI Journal Vol. 38, No. 5, pp , Oct [8] M. Lee, Studies on the coordinate systems, Hannam University Graduate School of Education, pp.7-8, February [9] I. Do, K. Kim, G. Jung, K. Jung, and S. No, Performance Comparisons of Multi - Process and Multi - Thread based Web Servers on Multiple Operating System Platforms, Journal of KIISE, JOK, Vol.30, No.1C, pp.94-96, April [10] Y. Kang, M. Kim, Y. Kim, G. Park, "The Rotating Display Signage System", The Korean Institute of Broadcast and Media Engineers, , (2 pages)

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2 : 3 (Myeongah Cho et al.: Three-Dimensional Rotation Angle Preprocessing and Weighted Blending for Fast Panoramic Image Method) (Special Paper) 23 2

2 : 3 (Myeongah Cho et al.: Three-Dimensional Rotation Angle Preprocessing and Weighted Blending for Fast Panoramic Image Method) (Special Paper) 23 2 (Special Paper) 232, 2018 3 (JBE Vol. 23, No. 2, March 2018) https://doi.org/10.5909/jbe.2018.23.2.235 ISSN 2287-9137 (Online) ISSN 1226-7953 (Print) 3 a), a), a) Three-Dimensional Rotation Angle Preprocessing