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Calibration Sets for Multiprimary Displays: Representation, Visualization, and Applications

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In this paper, we consider idealized additive multiprimary displays and provide: (a) a complete mathematical characterization for the calibration set, i.e., the set of control values that produce a given color, (b) a subspace decomposition of the device control space that decomposes the control signals into constrained and unconstrained dimensions, and (c) a method for visualizing and analyzing alternative calibration strategies via the representation and the subspace decomposition. Specifically, we demonstrate that the calibration set for a given color is a convex polytope in the device control space whose vertices correspond to alternative tessellations of the gamut in a previously proposed representation. For a K primary display, we decompose the K dimensional control space into a 3 dimensional control visual subspace (CVS) that is completely determined by the desired color and a (K–3) dimensional control black space (CBS) that contains the alternative calibrations within its linear varieties, i.e., affine translations. We use these results for ready visualization and analysis of these sets and of alternative calibration strategies for multiprimary displays. For display technologies such as OLED, where power is switched at the individual pixel level, our methodology reduces the minimum and maximum power calibration strategies to linear programs on polytopes, which are wellstudied and allow corresponding calibrations to be immediately determined as appropriate vertices of the polytopes for calibration sets. The visualizations confirm the intuition that these calibration strategies are not necessarily well-behaved in the presence of device variability we highlight how alternative strategies can be formulated within the proposed framework.
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Document Type: Research Article

Publication date: November 3, 2014

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  • CIC is the premier annual technical gathering for scientists, technologists, and engineers working in the areas of color science and systems, and their application to color imaging. Participants represent disciplines ranging from psychophysics, optical physics, image processing, color science to graphic arts, systems engineering, and hardware and software development. While a broad mix of professional interests is the hallmark of these conferences, the focus is color. CICs traditionally offer two days of short courses followed by three days of technical sessions that include three keynotes, an evening lecture, a vibrant interactive (poster) papers session, and workshops. An endearing symbol of the meeting is the Cactus Award, given each year to the author(s) of the best interactive paper; there are also Best Paper and Best Student Paper awards.

    Please note: for Purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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