Re: Pre-Linearization or Iterative Profiling (WAS Re: Printer profile mis-shape?)
Re: Pre-Linearization or Iterative Profiling (WAS Re: Printer profile mis-shape?)
- Subject: Re: Pre-Linearization or Iterative Profiling (WAS Re: Printer profile mis-shape?)
- From: Marco Ugolini <email@hidden>
- Date: Tue, 29 Aug 2006 14:50:51 -0700 (GMT-07:00)
In a message dated Aug 29, 2006 12:25 PM, Darren Sheppard wrote:
>If you re-linearize using the RIP's tools in the future and for
>whatever reason this linearization curve changes, surely you would
>have to redo the MP "linearization" and the MP profile?.
When you wish to use this technique with a RIP (whether we wish to call it "pre-linearization" or you-name-it), the testchart is modified -- by MP or ColorPort -- using values from MP's (or ColorPort's) linearization chart, which gets printed to the device via the RIP, which in turn modifies the output through its own (and *separate*) linearization procedure. Complicated enough yet?
If the RIP is relinearized *from scratch* (not just realigning the current linearization, but starting over), that changes the output. In that case, the teschart must be modified and then output again and measured, and a *new* profile must be created to reflect the changed state of the device.
Ideally, though, if you just relinearize the RIP without starting over (as opposed to linearizing all over again from scratch), that should keep the output in line with the previous results, without changing the state of the device. That way, the previously-made profile should remain valid.
Regards.
----------
Marco Ugolini
Mill Valley, CA
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