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  • Delta e difference

    Hi there,

    if i have LAB values both target and actual, is there a easy way to work out delta e difference ? if so how do i do it?


    Cheers Paul

  • #2
    Re: Delta e difference

    http://www.brucelindbloom.com/index....E_CIE2000.html

    I think the basic formula (CIE1976?) is something like sqrt( (L1-L2)sq + (a1-a2)sq + (b1-b2)sq )

    I could be wrong though. Hope that helps.

    -sean

    edit: um, this is the link I meant:

    http://www.brucelindbloom.com/index....renceCalc.html

    Edited by: Sean Girard on Jan 16, 2008 7:39 PM

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    • #3
      Re: Delta e difference

      Hi Paul

      Have you got a spectro..I use the viptronic 2000 to tell me the difference. The Delta E of 2-3 is acceptable.

      Dan

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      • #4
        Re: Delta e difference

        Thanks for the answers, i use the vipdens as well but im comparing the refs to ISO 12467, and i havent got any of those stored as references in the device. Do you zero to abs twice a day with yor device? if so do you have a ref card and do you find the device accurate as im having a LOT OF HASSLE getting readings which i would class as accurate.

        Paul

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