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Analytic Network Process 기반의 디스플레이 인지화질 평가

Perceptual Quality Assessment on Display based on Analytic Network Process

  • Sung, Jung-Min (School of Electronics Engineering, Kyungpook national university) ;
  • Choi, Bong-Seok (School of Electronics Engineering, Kyungpook national university) ;
  • Choi, Bong-Yeol (School of Electronics Engineering, Kyungpook national university) ;
  • Ha, Yeong-Ho (School of Electronics Engineering, Kyungpook national university)
  • 투고 : 2014.03.24
  • 심사 : 2014.06.25
  • 발행 : 2014.07.25

초록

현재 디스플레이 기술의 급격한 발전과 종류의 다양성으로 인해 디스플레이 화질평가에 대한 중요성이 대두되고 있다. 기존 디스플레이 화질평가는 물리측정에 의한 정량적 평가법이 사용되어 왔지만, 이러한 방법은 최종 평가자인 인간의 인지평가와 일치하지 않는다. 따라서 이와 같은 모순점을 해결함과 동시에 디스플레이의 물리적 특성과 인간의 인지화질 사이의 정량적 상관관계를 정립할 필요가 있다. 이에 본 논문은 디스플레이들의 상대적 인지화질을 평가할 수 있는 체계화된 방법을 제안하며, 이 방법을 통해 디스플레이들의 상대적 인지화질을 정량화한다. 디스플레이들에 대한 상대적 인지화질평가는 개개인의 주관적 의사를 평가하는 것과 같으며, 이 점에 착안하여 디스플레이 인지화질평가에 의사결정방법들 중 하나인 Analytic Network Process(ANP)를 도입하였다. 또한, 본 논문은 인간의 시각정보처리 체계를 표현하기 위해서 색, 모양, 깊이에 해당하는 3가지 평가기준을 채택하였으며, 그 3가지 평가기준들에 대한 하위 평가항목들로 디스플레이의 대표적 특성 8가지를 사전 설문조사를 통해 선정하였다. 제안된 방법과 주관적 평가의 유사성을 입증하기 위해 대표적인 모바일 디스플레이인 TFT-LCD와 OLED 디스플레이에 대해 상대적 인지화질을 실험 평가하였다. 그 결과, 제안된 방법에 의해 정량화된 값들 사이의 대소관계와 주관적 평가를 통해 얻은 디스플레이 선호도 간의 관계가 유사하다는 것을 입증하였다.

Display quality assessment has been a long standing issue due to the diversity of display devices and the rapid growth of display technology. The conventional display quality assessment methods are mostly those methods which evaluate qualities of a display by measuring physical quantities, but the results from the methods are not equal to the perceived results which are acquired with subjective experiments. Thus, we need to solve the above contrariety as well as establish the quantitative correlation between physical and perceived results. This paper proposes the systematic method of evaluating relative perceived qualities among various display devices and quantifies these relative perceived qualities. The proposed method is based on Analytic Network Process(ANP), which is one of the most popular decision making methods in the business administration field. We also adopted three evaluation criteria, which consist of color, shape and depth, in order to reflect the human visual system and chose eight sub-criteria related to display characteristics via question investigation. We carried out a subjective experiment and the proposed method which evaluated perceived qualities of two display devices(TFT-LCD, OLED) in order to prove the similarity between their results. As a result, it is proved that the order relationship between perceived qualities was the same as the order of results got through the subjective experiment.

키워드

참고문헌

  1. www.displaybank.com
  2. Hiroyuki Ito, Masaki Ogawa and Shoji Sunaga, "Evaluation of an organic light-emitting diode display for precise visual stimulation," Journal of Vision, 13(7):6, p. 1-21, 2013.
  3. 이승배, 정호균, 김상수, "OLED 화질 평가 기술," 전자공학회지, 제37권, 제2호, 2010년 2월.
  4. Tae-Yong Park, Cheol-Hee Lee, Yeong-Ho Ha, "Evaluation of Color Reproduction Characteristics of TFT-LCD and AMOLED for Mobile Phone," , Jan., 2008.
  5. Rajae-Joordens, R. and Heynderickx, I., "Effect of resolution, sharpness, contrast and luminance on depth impression and overall image quality for a 2D TV," SID Symposium Digest of Technical Papers, 35(1), pp. 1370-1373, 2004.
  6. Heynderickx, I. and Langendijk, E. H. A., "Image Quality Comparison of PDP, LCD, CRT and LCos Projection," SID Symposium Digest of Technical Papers, 36(1), pp. 1502-1505, May 2005.
  7. 이승배, "Display의 감성 화질 평가기술," 조명 전기설비학회지, 제21권, 제5호, 2007년 10월.
  8. Nyman, G., Radun, J., Leisti, T. and Vuori, T., "From image fidelity to subjective quality: a hybrid qualitative/quantitative methodology for measuring subjective image quality for different image contents," Proceedings of International Display Workshops, 12(2), pp. 1817-1820, 2005.
  9. Eun-Hye Jang, Sangsup Choi, Kyung Hwa Lee, Jin-Hun Sohn, "Development of Emotion Assessment Scale in Evaluation of Television Picture Quality," Korean Journal of the science of Emotion & sensibility, Vol. 12, No. 1, pp. 121-128, 2009.
  10. Eunjung Lee, Jong Ho Chong, Sun A Yang, Hun Jung Lee, Miok Shin, Su Young Kim, Dong Wook Choi, Seung Bae Lee, Han Yong Lee, and Brian H. Berkeley, "Improved Angle-of-View Measurement Method for Display Devices," Journal of Information Display, 11(1), pp. 17-20, 2010. https://doi.org/10.1080/15980316.2010.9652112
  11. Wen-Hung Kuo, Po-Hung Lin and Sheue-Ling Hwang, "A framework of perceptual quality assessment on LCD-TV," Displays, 28, pp. 35-43, 2007. https://doi.org/10.1016/j.displa.2006.11.005
  12. Thomas L. Saaty, "The analytic hierarchy and analytic network measurement processes: Applications to decisions under Risk," European Journal of Pure and Applied Mathematics, 1(1), pp. 122-196, 2008.
  13. Livingston and Hubel, "Segregation of form, color, movement and depth," Science, 240, pp. 740-9, 1988. https://doi.org/10.1126/science.3283936
  14. D. Hubel and M. Livingston, "Segregation of form, color and stereopsis in primate area 18," J. Neuroscience, 7, pp. 3378-3415, 1987.
  15. T. L. Saaty, "A scaling method for priorities in hierarchical structures," J. Mathematical Psychology, 15(3), p. 234-281, June 1977. https://doi.org/10.1016/0022-2496(77)90033-5
  16. T. L. Saaty, "The Analytic Hierarchy Process," McGraw-Hill, New York, 1980.
  17. T. L. Saaty, "How to make a decision: The analytic hierarchy process," European J. Operational Research, 48(1), pp. 9-26, September 1990. https://doi.org/10.1016/0377-2217(90)90057-I
  18. Jumpei Nakamura, "Appliance, PC makers compete over LCD TV image quality," NIkkei Elecctronics Asia, July 2004.
  19. Howard Anton, "Elementary Linear Algebra 9th", John Wiley & Sons Inc., 2005.
  20. 박용성, "AHP에 의한 의사결정 이론과 실제," 교우사, 2012년.