정보과학회 논문지 (Journal of KIISE)

  • 제43권1호
  • /
  • Pages.126-134
  • /
  • 2016
  • /
  • 2383-630X(pISSN)
  • /
  • 2383-6296(eISSN)
한국정보과학회 (Korean Institute of Information Scientists and Engineers)
권호 표지
DOI QR코드

DOI QR Code

모바일 OLED 디스플레이를 위한 인간 시각 만족의 최적 전력 절감 색 변환

Human Visual System-Aware Optimal Power-Saving Color Transformation for Mobile OLED Devices

  • 이재혁 (아주대학교 전자공학과) ;
  • 김은실 (아주대학교 전자공학과) ;
  • 김영진 (아주대학교 전자공학과)
  • 투고 : 2015.06.10
  • 심사 : 2015.11.10
  • 발행 : 2016.01.15
⟨ 이전 논문 다음 논문 ⟩

초록

OLED 디스플레이는 빠른 응답속도, 전력 효율성 등 여러 장점 때문에 점차 사용이 증가하고 있는 추세이다. 뛰어난 전력 효율성에도 불구하고 메신저, 게임 등의 사용자와의 상호작용 기반의 어플리케이션 사용의 증가로 OLED에 의한 전력 소모 비중이 여전히 크게 나타나고 있다. OLED에서는 출력하는 영상에 따라 소모 전력이 크게 달라지기 때문에 저전력 색 변환 기법이 대표적인 전력 절감 기법이다. 기존의 저전력 색 변환 기법들은 색 변환 시 인간 시각 시스템의 만족에 대한 엄밀한 연구가 없으며, 시각 만족도와 소모 전력을 동시에 최적으로 고려하는 연구가 부재했다. 본 연구에서는 기존 기법들의 문제점을 보완한 새로운 저전력 색변환 기법을 제안한다. 실험 결과를 통해서 제안 기법이 기존 기법보다 시각 만족도 측면에서 더 인간 시각 시스템을 만족하며 또 전력절감 측면에서도 색 변환거리에 따라 기존 기법보다 평균 13.4% 및 22.4% 향상된 전력 절감이 가능한 것으로 나타났다.

Due to the merits of OLED displays such as fast responsiveness, wide view angle, and power efficiency, their use has increased. However, despite the power efficiency of OLED displays, the portion of their power consumption among the total power consumption is still high since user interaction-based applications such as instant messaging, video play, and games are frequently used. Their power consumption varies significantly depending on the display contents and thus color transformation is one of the low-power techniques used in OLED displays. Prior low-power color transformation techniques have not been rigorously studied in terms of satisfaction of the human visual system, and have not considered optimal visual satisfaction and power consumption at the same time in relation to color transformation. In this paper, we propose a novel low-power color transformation technique which strictly considers human visual system-awareness as well as optimization of both visual satisfaction and power consumption in a balanced way. Experimental results show that the proposed technique achieves better human visual satisfaction in terms of visuality and also shows on average 13.4% and 22.4% improvement over a prior one in terms of power saving.

키워드

과제정보

연구 과제 주관 기관 : 한국연구재단

참고문헌

  1. A. Carroll and G. Heiser, "An analysis of power consumptionin a smartphone," Proc. of USENIX Annual Technical Conference, 2010.
  2. B. Anand, L. Kecen, and A. L. Ananda, "PARVAI-HVS Aware Adaptive Display Power Management for Mobile Games," Proc. of ICMU, 2014.
  3. T. K. Wee, T. Okoshi, A. Misra, and R. K. Balan, "FOCUS: a usable & effective approach to OLED display power management," Proc. of the 2013 ACM international joint conference on Pervasive and ubiquitous computing, ACM, 2013.
  4. D. Mian, Y. S. K. Choi, and L. Zhong. "Power-saving color transformation of mobile graphical user interfaces on OLED-based displays," Proc. of the 2009 ACM/IEEE international symposium on Low power electronics and design, ACM, 2009.
  5. M. Dong and L. Zhong, "Chameleon: A Color-Adaptive Web Browser for Mobile OLED Displays," Proc. of MobiSys, 2011.
  6. J. Wang, X. Lin, and C. North, "GreenVis: energy-saving color schemes for sequential data visualization on OLED displays," Technical Report TR-12-09, Department of Computer Science, Virginia Tech., 2012.
  7. B. Anand, K. Thirugnanam, J. Sebastian, P. G. Kannan, A. L. Ananda, M. C. Chan, and R. K. Balan, "Adaptive display power management for mobile games," Proc. of the 9th international conference on Mobile systems, applications, and services, ACM, 2011.
  8. Z. Wang, A. C. Bovik, H. R. Sheikh, and E, P. Simoncelli, "Image quality assessment: from error visibility to structural similarity," IEEE Trans. Image Processing, Vol. 13, No. 4, pp. 600-612, Apr. 2004. https://doi.org/10.1109/TIP.2003.819861
  9. (2015, June 9). "Lab color space," [Online]. Available: http://en.wikipedia.org/wiki/Lab_color_space (accessed 2015, Jan. 1).
  10. M.J. Chen and A. C. Bovik, "Fast structural similarity index algorithm," Journal of Real-Time Image Processing, Vol. 6, No. 4, pp. 281-287, 2011. https://doi.org/10.1007/s11554-010-0170-9
  11. (2015, April 21). "HSL and HSV," [Online]. Available: http://en.wikipedia.org/wiki/HSL_and_HSV(accessed 2015, Jan. 1).
  12. H.R. Sheikh, Z.Wang, L. Cormack and A.C. Bovik. (2006, Nov). "LIVE Image Quality Assessment Database Release 2," [Online]. Available: http://live.ece.utexas.edu/reearch/quality/subjective.htm(download ed 2015, Jan. 1).
  13. Tropical Fish Wallpaper [Online]. Available: http://pxwallpaper.com/11938-tropical-fish-wallpaper-download-the-free-tropical-fish-wallpaper.html.
  14. Jae-Hyeok Lee and Young-Jin Kim, "Human visual system-aware and power-saving color transformation space search," Proc. of Korea Computer Congress 2014, pp. 1668-1670, 2014.