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Emissive chart for imager calibration

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Each and every color imaging device should be custom calibrated both to enhance image processing algorithms and to produce pleasing and faithful images of the captured scenes or medias. Custom calibrations, however, are usually not performed because calibration instruments are either too slow to be used on the manufacturing line or the instruments lack the necessary accuracy. We have developed a calibration instrument that enables both fast and accurate imager calibrations. The instrument is based on emissive narrow-band light sources—light emitting diodes—arranged in a grid pattern or chart configuration. We refer to the instrument as the emissive calibration chart or the EC chart. We compare the emissive calibration chart to other calibration instruments, which include reflective charts, like the Macbeth ColorChecker or DC charts, and monochromators. The results demonstrate that custom calibrations of each and every imager could be accurately determined on the manufacturing line using the emissive calibration chart.
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Document Type: Research Article

Publication date: January 1, 2004

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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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