Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Image quality assessment of color LCD monitors by polychromatic modulation transfer function

다색광전달함수를 사용한 컬러 LCD 모니터의 광학적 상평가법

  • Song, Jong-Sup (Optical Module R&D Group, Optics Division, Samsung Electro-mechanics Co. Ltd.) ;
  • Jo, Jae-Heung (Dept. of Physics, Hannam University) ;
  • Hong, Sung-Mok (Dept. of Physics, Hannam University) ;
  • Lee, Yun-Woo (Photometry & Imaging Optics Group, Korea Research Institute of Standards and Science) ;
  • Yang, Ho-Soon (Photometry & Imaging Optics Group, Korea Research Institute of Standards and Science) ;
  • Cho, Hyun-Mo (Photometry & Imaging Optics Group, Korea Research Institute of Standards and Science) ;
  • Lee, In-Won (Photometry & Imaging Optics Group, Korea Research Institute of Standards and Science)
  • 송종섭 ((주)삼성전기 광사업부 광모듈사업팀 광모듈개발그룹) ;
  • 조재흥 (한남대학교 이과대학 광·전자물리학과) ;
  • 홍성목 (한남대학교 이과대학 광·전자물리학과) ;
  • 이윤우 (한국표준과학연구원 광도영상그룹) ;
  • 양호순 (한국표준과학연구원 광도영상그룹) ;
  • 조현모 (한국표준과학연구원 광도영상그룹) ;
  • 이인원 (한국표준과학연구원 광도영상그룹)
  • Published : 2005.02.01
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Abstract

We propose a method for evaluating the image quality of color liquid crystal display(LCD) monitors by using the polychromatic modulation transfer function(PMTF), which is calculated from the modulation transfer function(MTF) weighted by the overall color response of the system including the test LCD monitor. We confirm that experimental results using the PMTF agree well with simulated results of the PMTF of a color LCD monitor by using three bar targets with different amplitudes and three elementary colors such as red(R), green(G), and blue(B). As a results, we should choose the PMTF instead of the white color MTF or monochromatic MTF in order to evaluate correctly the image quality of color LCD monitors.

컬러 LCD(liquid crystal display) 모니터의 광학적 상에 대한 성능을 평가하기 위하여 LCD 모니터를 포함한 모든 광학계의 파장별 공간주파수 반응에 가중치를 부여한 진폭전달함수(modulation transfer function ; MTF)를 이용한 다색광전달함수(polychromatic modulation transfer function ; PMTF)를 제안한다. 서로 다른 진폭들을 갖는 적색(R), 녹색(G), 청색(B)의 3개의 막대형 LCD 단위물체를 이용한 컬러 LCD의 PMTF의 시뮬레이션 결과와 실험적 결과가 잘 일치하며, 이 결과 컬러 LCD의 결상성능은 단색으로 측정하는 MTF 및 가시광의 전파장대를 사용하는 백색광 MTF와는 다른 R, G, B의 3색에 대한 PMTF로 측정하늘 것이 보다 적절하다.

Keywords

References

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