Re: Delta H Comparison
Re: Delta H Comparison
- Subject: Re: Delta H Comparison
- From: Lee Badham <email@hidden>
- Date: Fri, 7 Aug 2009 10:38:58 +0100
Ops,
That's the problem with cutting and pasting out of code. The line
below returns the sqrt of the dH value.
Lee
On 6 Aug 2009, at 19:08, Mauro Boscarol wrote:
On 5 Aug 2009, at 11:37 AM, Lee Badham wrote:
Hi,
We've got to be a little careful here in what we mean by dH
because dH and dh are different.
The discussion has so far been about dh which is the difference in
hue angle when using LCh
dH as used in the ISO 12647-7 proofing standard is a different
formula
dH=da^2+db^2-dC^2
In the above formula there is a little typo. Correct version is:
dH^2=da^2+db^2-dC^2
Mauro Boscarol
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