A rational methodology for estimating the luminous flux based upon color primaries from digital projection displays

Published: January 01, 2009


Edward F. Kelley, Karl Lang, Louis D. Silverstein, Michael H. Brill


A standard methodology exists for estimating the flux from front projection displays by sampling the projected illuminance of a white source signal. With the advent and use of white projection primaries, a dramatic increase in flux can be achieved over the red, green, and blue primaries alone. However, saturated-color areas in an image are constrained to low flux levels relative to the display maximum, and hence bright colors cannot be rendered accurately. Because the display of color-accurate imagery does not generally use the white primary, there is a need for providing an equivalent flux measurement that will better describe a projectors color performance when rendering full color imagery. Background research and a method utilizing the source-signal color primaries is described.
Citation: NIST Interagency/Internal Report (NISTIR) - 6657
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Pub Type: NIST Pubs

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color accuracy, color output, color perception, color rendering, display measurement, display metrology, ICDM Display Measurements Standard, IEC 61947-1, ISO 21118, light output, front projector, flux measurement, projection display, sampled luminous flux measurement, white primary, white subpixel
Created January 01, 2009, Updated February 19, 2017