Trying to convert a spectra into CRI

Discussion in 'Lighting' started by Steve, Aug 27, 2012.

  1. Steve

    Steve Guest

    I posted this to sci.color, but got no real response. Perhaps someone here
    could help me.

    I am trying to figure out the algorithm to compute the color rendering index
    from a spectrum (spaced 5nm intervals). I have the CIE 13.3-1995 publication,
    but it is not clear what one is to do. I can compute X,Y,Z from the spectrum,
    along with the X,Y,Z from the test samples (using Table 1 and Table 2 in the
    publication), but I don't understand the notation that is used in Equations 5-3
    through 5-6.

    The publication comes with a CD with the CRI calculation program CIE13_3D.EXE.
    If anyone knows where I could obtain the source code to the program, it would
    answer most of my questions.

    Any help would be greatly appreciated.

    Thanks in advance.

    Steve, Aug 27, 2012
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