Dr. Gabriel G. Marcu
Senior Scientist at Apple Inc
SPIE Involvement:
Fellow status | Conference Chair | Conference Program Committee | Symposium Committee | Symposium Chair | Editor | Author | Instructor
Publications (35)

Showing 5 of 35 publications
Conference Committee Involvement (21)
Mobile Devices and Multimedia: Enabling Technologies, Algorithms, and Applications 2015
10 February 2015 | San Francisco, California, United States
Color Imaging XX: Displaying, Processing, Hardcopy, and Applications
9 February 2015 | San Francisco, California, United States
Color Imaging XIX: Displaying, Processing, Hardcopy, and Applications
3 February 2014 | San Francisco, California, United States
Mobile Devices and Multimedia: Enabling Technologies, Algorithms, and Applications 2014
3 February 2014 | San Francisco, California, United States
Color Imaging XVIII: Displaying, Processing, Hardcopy, and Applications
4 February 2013 | Burlingame, California, United States
Showing 5 of 21 published special sections
Course Instructor
SC075: Effective Color Computing
This course will provide an overview of the color concepts used in the computer world today, illustrated with practical examples and computer demonstrations. It translates theoretical color concepts into practical knowledge useful to the application developer. The course is structured in three parts: color perception (trichromatic color vision, metamerism, color generation), color analysis (clustering and segmentation), and color reproduction (device dependent color, halftoning, gamut mapping, color management). Computer animation is used for illustration of color spaces, 3D histograms, devices gamut, and gamut mapping. Halftoning examples are presented for several screening methods (stochastic screening, several error diffusion variants, pulse density modulation and mixed techniques). Color management system architecture is discussed and the ICC profile specifications for accurate color reproduction are explained.
SC077: Quality Factors in Color Reproduction
This course discusses the quality factors of color reproduction for displaying and printing. For high quality color reproduction and display, the technology, resolution, color gamut, viewing angle, gain function, luminance level, and flare are discussed. Reproduction equipment, colorant/media interaction, geometric resolution, halftoning, color separation (including UCR/GCR), TRC corrections, and gamut mapping are examined for their influence on print quality. The importance of color management (including characterization and calibration) for high quality color reproduction is discussed. Viewing conditions for print quality evaluation is highlighted. Measurement and interpretation of data (including gamut and histogram) for color quality evaluation are demonstrated. The importance of test and reference images is illustrated.
SC516: Color for Liquid Crystal Displays
This course discusses and illustrates the most important factors of color rendering in Thin-Film Transistor Liquid Crystal Displays (TFT-LCD). Factors such as: technology, luminance/brightness, color gamut, gain function, white point, gray tracking, response time, color model and color dependency on the viewing angle are discussed. Several TFT-LCD technologies such as Twisted Nematic (TN), In-Plane Switching (IPS, Super-IPS), Fringe Field Switching (FFS), Vertical Alignment (VA) are discussed. The importance of color management (including calibration and ICC characterization) for accurate color control is explained and the analytical/empirical color models are compared. The influence of viewing conditions and adaptation in the evaluation of the displayed color is highlighted. The role of measurement and interpretation of data (including gamut visualization and comparison) is demonstrated.
SC930: Optimizing Color Reproduction Systems
This course gives an overview of the essential elements of color reproduction systems today, illustrated with practical examples and demonstrations. This course translates theoretical color concepts into practical knowledge for controlling the color reproduction systems. The course covers device dependent/independent color specification, tone reproduction, gray tracking, halftoning, gamut mapping, color management. Halftoning examples are presented for several screening methods (stochastic screening, several error diffusion variants, pulse density modulation and mixed techniques). Color management system architecture is explained and the characterization and calibration concepts are discussed. ICC profile specifications for displays and printers are explained with examples and interactive demos.
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