Re: Please check this conifg for me and give your opinion
Re: Please check this conifg for me and give your opinion
- Subject: Re: Please check this conifg for me and give your opinion
- From: Rick Gordon <email@hidden>
- Date: Wed, 28 Mar 2007 23:51:06 -0700
A quick test based on setting color samplers in neutral, warm, and cool light areas on the PhotoDisc test image, duplicating the file three times, and converting, using ProfileMaker-generated RGB profiles from the same set of measurements (from an Epson 2200 printing to Heavyweight Matte) as follows, shows:
* AbsCol: identical values regardless of optical brightener correction
* Perceptual: OB-corrected version has B values 1-3 points higher and R values 0-2 points lower than non-OB-corrected version. (G values remain consistent throughout)
So, based on that small test, I'd have to concur with John's conclusion, although it's certainly not clearly spelled out in the ProfileMaker documentation.
Rick Gordon
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On 3/28/07 at 11:03 PM -0700, Marco Ugolini wrote in a message entitled
"Re: Please check this conifg for me and give your opinion":
>In a message dated 3/27/07 11:25 PM, John W Lund wrote:
>
> > -- as I understand it, the "Correct for Optical Brightener" function
>> applies only to the perceptual rendering intent, not to RelCol. That's great
>> for my fine art printing, but can pose some issues for a proofing workflow.
>
>I've heard that rumor before, and I just wish that someone with better and
>more reliable inside knowledge than the rest of us would come and set us
>straight one way or the other.
--
___________________________________________________
RICK GORDON
EMERALD VALLEY GRAPHICS AND CONSULTING
___________________________________________________
WWW: http://www.shelterpub.com
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