Digital BW, The Print

One caveat to this.  It is my understanding that the ICC spec does not
dictate the methodology used in perceptual intents.  The creator of the ICC
profile is free to employ whatever methodology they want.

Roy is doing a very simple thing.  He is making a transfer function by doing
three things: (1) recording the stimulus-response behaviour of the printer
(required) (2) scaling that stimulus-response data for media white point
(required) and (3) doing black point compensation according to Adobe's white
paper posted at www.color.org (not required but sensible - you'd invoke it
anyway.  FYI it does not matter whether you select it in the Print with
Preview pane because it is embedded in the ICC profile).

People - I am not a colour expert here.  I have just come up this learning
curve and I am trying to answer questions to the best of my ability!!


> From: Steve Kale <stevekale@...>
> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Date: Tue, 18 Oct 2005 18:08:27 +0100
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Conversation: [Digital BW] ICC v. Transfer Function in Epson driver
> Subject: Re: [Digital BW] ICC v. Transfer Function in Epson driver
> 
> Yes.  But in greyscale there is actually, I believe, no difference between
> relcol and perceptual. (You need to select perceptual in the driver so it
> links to the A2B0/B2A0 tables.)
>