Colour Management for Cholesteric Displays: Creation and Usage of ICC Colour Profiles
The effectiveness of large format reflective colour CHLC displays has been demonstrated for outdoor display applications. However, the optical qualities of the medium combined with unpredictable viewing environments pose a challenge to using mainstream ICCbased colour management solutions. The optical qualities of the CHLC and the difficulties they pose for metrology are discussed culminating in the recommendation of a diffuse normal (d:0o) measurement geometry (non-standard for graphic arts). A test-device is measured and an accurate characterization model developed using a polynomial regression method. The gamut shape of the CHLC medium is found to exhibit surface concavities, and a modified convex hull method is used to establish its gamut boundary descriptor before using a carefully selected gamut clipping algorithm to populate the ICC media relative rendering intent of a CLUT-based profile. Challenges to the CHLC’s ICC profile usage are discussed, including the lack of a standard viewing condition for outdoor displays and the issue of incomplete viewer adaptation. Expectations of the end-user are hard to manage, especially if clients intend to use the resulting colour profile with their existing desktop software. Usability issues relate to the different ICC profile formats MatrixTRC or CLUT). An alternative strategy of producing a ‘CHLC reference RGB colourspace’ is explored, and how it might be used within the limitations of mainstream soft-proofing tools for previewing an RGB output device.
Gregory High Phil Green David Coates Chris Hughes
London College of Communication Magink Display Technologies United Kingdom Magink Display Technologies United Kingdom
国际会议
The 31st International Congress on Imaging Science(第31届国际影像科学大会 ICIS2010)
北京
英文
35-38
2010-05-12(万方平台首次上网日期,不代表论文的发表时间)