Characterization Method and Color Matching Technology for Mobile Display

모바일 디스플레이를 위한 특성화 방법과 색 정합 기술

  • 박기현 (경북대학교 전자전기컴퓨터학부) ;
  • 하영호 (경북대학교 전자전기컴퓨터학부) ;
  • 이철희 (안동대학교 컴퓨터공학)
  • Published : 2006.04.01

Abstract

This paper proposes a color-matching 3D look-up table that simplifies the complex color-matching procedure between a monitor and a mobile display device, where the image colors are processed in a device-independent color space, such as CIEXYZ or CIELAB, and gamut mapping performed to compensate the gamut difference. The transform from a device-dependent RGB color space to a device-independent color space is implemented by performing display characterization. The mobile LCD characterization error using the S-curve model is larger than the tolerance error since the mobile LCD has the channel-chromaticity-inconstancy and channel-dependence characteristics. In this paper we reduced the characterization error using the electro-optical transfer functions of X, Y, and Z value for R, G, B, C, M, Y, K components. Experimental results demonstrated that 64 ($4{\times}4{\times}4$) was the smallest size of color-matching look-up table that could produce an image with an acceptable reproduction error, based on a comparison of color-matched images resulting from the proposed color-matching look-up table and complex step-by-step color-matching procedures.