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Factors Influencing the Appearance of CRT Colors

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The color appearance of a stimulus depends on the context in which it is viewed. Well-known examples of context effects include simultaneous color contrast and color constancy. In simultaneous contrast, the color immediately surrounding a test influences its appearance. In color constancy, the visual system adapts to the ambient illumination to keep surface color approximately constant. Color constancy is a context effect because the way that the visual system interprets the light reaching the eye depends on the context defined by the ambient illumination.

To predict accurately the color appearance of stimuli rendered on a CRT monitor, we need a theory of color context effects that applies to such stimuli. Simultaneous contrast suggests that the color perceived at a particular monitor location may vary with the immediate context provided by the image at other locations on the monitor (the monitor context). Color constancy suggests that the color appearance of stimuli displayed on a monitor may vary with the ambient illumination of the room in which the monitor is viewed (the illumination context), at least if images from a monitor are processed by the visual system in the same way as reflective surfaces.

In this paper, we report initial experiments designed to measure psychophysically how the monitor context and the illumination context influence the appearance of stimuli presented on CRT color monitors. Our emphasis, however, is on the effect of the illumination context.
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Document Type: Research Article

Publication date: January 1, 1995

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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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