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XYZ2SRGB

XYZ2SRGB

Name


    XYZ2SRGB

Purpose


    This function converts a provided set of tristimulus values to
    sRGB. The tristimulus values are assumed to be in the range
    [0,1] and computed with illuminant D65. A non-linearity adjustment
    for the monitor response is applied (gamma = 2.2).
      (Source: http://www.brucelindbloom.com)
      | R-linear | | 3.2404542 -1.5371385 -0.4985314 | | X |
      | G-linear | = | -0.9692660 1.8760108 0.0415560 | * | Y |
      | B-linear | | 0.0556434 -0.2040259 1.0572252 | | Z |
    For [R-linear,G-linear,B-linear] <= 0.0031308
      sRGB = 12.92 * sRGB
    For [R-linear,G-linear,B-linear] > 0.0031308
      sRGB = ( 1 + a ) * sRGB^( 1 / 2.4 ) - a

Category


    Color Science.

Calling Sequence


    Result = XYZ2SRGB( xyz )

Inputs


    xyz
      A 3-element vector or 3xn array of XYZ tristimulus values
      (each in the range [0,1]). The tristimulus values are
      assumed to have been computed using illuminant D65.

Keyword Parameters


    None

Return Value


    Result is either a 3-element vector or a 3xn array that contains
    the computed sRGB color values

Side Effects


    None

Modification History


    Written by: Carl Salvaggio
    January, 2008 Original code
    February 2010 Modified with more precise coefficients
    July 2010 Corrected error with sRGB values and threshhold

Disclaimer


    This source code is provided "as is" and without warranties as to performance
    or merchantability. The author and/or distributors of this source code may
    have made statements about this source code. Any such statements do not
    constitute warranties and shall not be relied on by the user in deciding
    whether to use this source code.
    This source code is provided without any express or implied warranties
    whatsoever. Because of the diversity of conditions and hardware under which
    this source code may be used, no warranty of fitness for a particular purpose
    is offered. The user is advised to test the source code thoroughly before
    relying on it. The user must assume the entire risk of using the source code.



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