Re: Newsprint G7 calibration
Re: Newsprint G7 calibration
- Subject: Re: Newsprint G7 calibration
- From: Steve Upton <email@hidden>
- Date: Sun, 25 Mar 2007 22:09:14 -0700
At 8:15 PM -0400 3/25/07, Roger Breton wrote:
> > What difference does it make, Roger? You don't have access to that
>> golden device, do you?
>>
>> Rich Apollo
>
>True, even I knew which one it was, I wouldn't necessarily have access to
>it. On the other hand, I believe in such thing as inter-instrument
>agreement. When instruments are within the manufacturer's specified
>calibration -- I've personally seen this many times -- readings made with
>various instruments of the same make and model closely relate to each other.
>
>Call me an idealist but I believe anyone has a better fighting chance to
>match a given set of colors when they know what it was created with.
I do agree that it would be nice to know more about how the data are created sometimes.
I have found, however, that for the well processed industry-standard/spec datasets that finding out information that might help me make similar measurements gets very murky.
The data is so highly processed that the instrument effects are largely filtered out. Some data sets like the TR001 set were measured with both GretagMacbeth and X-Rite instruments.
This is not such a bad thing as the data really does need much smoothing & averaging and this processing is essential to good idealized data.
Regards,
Steve
________________________________________________________________________
o Steve Upton CHROMiX www.chromix.com
o (hueman) 866.CHROMiX
o email@hidden 206.985.6837
o ColorGear ColorThink ColorValet ColorSmarts ProfileCentral
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