Re: Averaging LAB values
Re: Averaging LAB values
- Subject: Re: Averaging LAB values
- From: Phil Green <email@hidden>
- Date: Wed, 03 Jan 2001 15:06:37 +0000
- Organization: LCP
Edmond Cho wrote:
>
>
I have a question about how you might average 3 LAB values. Is it as simple
>
as adding each value up and dividing by three or is there something deeper
>
involved?
Assuming that you're averaging measurements made by the same device to
smooth out some of the intra-instrument variation, that's all there is
to it: L=(L1+L2+L3)/3, a=(a1+a2+a3)/3, b=(b1+b2+b3)/3.
It would be less valid to do it for measurements made by different
instruments, or where the differences were large (>5 DE).
--
Phil Green
Colour Imaging Group
School of Printing and Publishing
LCP
Elephant and Castle, London SE1 6SB
Tel: +44 020 7514 6759 Fax: +44 020 7514 6772
http://twinpentium.lcp.linst.ac.uk/digitalcolor/cig