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

Published

January 1, 2009

Author(s)

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

Abstract

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

Report Number

6657

NIST Pub Series

NIST Interagency/Internal Report (NISTIR)

Pub Type

NIST Pubs

Download Paper

Local Download

Keywords

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

Citation

Kelley, E. , Lang, K. , Silverstein, L. and Brill, M. (2009), A rational methodology for estimating the luminous flux based upon color primaries from digital projection displays, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=901354 (Accessed October 8, 2025)