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NTIS 바로가기방송과 미디어 = Broadcasting and media magazine, v.25 no.1, 2020년, pp.75 - 82
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
GPS는 어떠한 기술인가? | 첫 번째로는 잘 알려진 GPS(Global PositioningSystem)를 들 수 있다. GPS는 <그림 2>와 같이4개 이상의 인공위성에서 받은 거리 정보를 토대로삼변 측량(trilateration)을 통해 측위를 진행하는기술이다. 3개의 위성으로부터 위치를 추정할 수도있지만 일반적으로 시계의 오차를 보정하기 위해추가적으로 한 개의 위성을 더 필요로 한다. | |
영상을 기반으로 하는 측위 기술은 어떻게 구분되는가? | 영상을 기반으로 하는 측위 기술로는 크게 마커인식을 기반으로 하는 방식과 영상매칭을 기반으로하는 방식 두 가지로 나눌 수 있다. | |
추측 항법은 어떠한 단점이 있는가? | 하지만 이 방식은 측위 시간이 오래될수록 센서의 오차가 누적되어 측위의 오차로 나타나는 단점이 존재한다[3]. 센싱에 있어 칼만 필터나 파티클필터 등을 활용하여 누적되는 오차를 줄이는 등 정확도를 높이는 방식들이 연구되었으나 오차가 누적된다는 근본적인 문제를 해결하지는 못하였다[4][5]. |
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Saito, Shigeru, et al, "Indoor marker-based localization using coded seamless pattern for interior decoration," In 2007 IEEE Virtual Reality Conference, pp.67-74, 2007.
H. An. Deep learning-based indoor positioning system using pyramid LED beacons, Master's Thesis of Hoseo University, Asan, Korea, 2020.
Van Opdenbosch, Dominik, et al, "Camera-based indoor positioning using scalable streaming of compressed binary image signatures," In 2014 IEEE International Conference on Image Processing (ICIP), pp.2804-2808, 2014.
Cheng, Yaun-Chou, et al, "AR-based positioning for mobile devices," In 2011 40th International Conference on Parallel Processing Workshops, pp. 63-70, 2011.
Kawaji, Hisato, et al, "Image-based indoor positioning system: fast image matching using omnidirectional panoramic images," In Proceedings of the 1st ACM international workshop on Multimodal pervasive video analysis, pp.1-4, 2010.
Zhang, Xinzheng, Ahmad B. Rad, and Yiu-Kwong Wong, "Sensor fusion of monocular cameras and laser rangefinders for line-based simultaneous localization and mapping (SLAM) tasks in autonomous mobile robots," Sensors, Vol.12, No.1, pp.429-452, Jan 2012.
Komine, Toshihiko, and Masao Nakagawa, "Fundamental analysis for visible-light communication system using LED lights," IEEE transactions on Consumer Electronics, Vol.50, No.1, pp.100-107, June 2004.
Luo, Pengfei, et al, "An indoor visible light communication positioning system using dual-tone multi-frequency technique," In 2013 2nd International Workshop on Optical Wireless Communications (IWOW), pp.25-29, 2013
Li, Yiwei, et al, "A VLC smartphone camera based indoor positioning system," IEEE Photonics Technology Letters, Vol.30, No.13, pp.1171-1174, May 2018.
Tran, Huy Q., and Cheolkeun Ha. "Improved Visible Light-Based Indoor Positioning System Using Machine Learning Classification and Regression," Applied Sciences, Vol.9, No.6, 1048, Mar 2019.
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