Re: First attempt at profiling monitor and printer

["Alan Rew" <arew@patrol.i-way.co.uk>]

<x-charset iso-8859-1>On Tue May 8, 2001  1:36 pm,
C. David Tobie (CDTobie@aol.com) wrote:

>> In a message dated 5/8/01 8:43:46 AM, dmarder@r... writes:
>>I believe this blue/purple situation is characteristic of ColorVision's
>>software;
<snip>

> The purple shift is characteristic of any Lab based transform,

Dave,

Can you explain why this is so? Why should transforming colours to Lab (and back again, perhaps)
cause hue shifts?

Is this problem peculiar to profiling packages? Or could I also get this phenomenon when converting
an image to Lab in PS?

> and shows in
> all profiling software that hasn't added some type of artificial adjustment
> to hide it.

So you're saying that many profiling packages 'fiddle the figures', but ColorVision products don't?
<Very> interesting!

> Considering that the effect is device specific, <snip>

Why is this?

Thanks for any insight on this subject.

Alan Rew

arew@patrol.i-way.co.uk


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