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Re: DTP70 - 2 step or not 2 step?


On Jul 30, 2007, at 5:15 PM, Marco Ugolini wrote: 
BTW, I hate to call it linearization since it doesn't directly
linearize the printer prior to profiling. I like "device customized
profile target generation" but I'm open to other, shorter ideas...

Isn't the process properly called "pre-linearization"?

Well, technically it is performed post-linearization and before profiling. Putting "linear" in the name should be avoided because it shouldn't be confused with any linearization process that may, or may not be taking place. When I train new users on this process their reaction is always something like: "Why are we linearizing again? I thought this other thing was the linearization. If this is for just making a better profile why don't they call it something other than linearization?"

While I like to think of MP's 1st step as characterizing the non- linear state of a device for the sake of generating a device customized target that will generate a superior profile, I think XRite could just call it step 1 of their 2 step profiling process for the sake of simplicity. Perhaps they could go into further detail about "device customized target generation" and what's going on under the hood in the manual.

MP's documentation is currently so poor that people are actually more confused about it after having read about it. How many times have you read and re-read that paragraph about linearization on page 118 of the MP manual? A better written paragraph could have advanced our community years ago. IMO, the point of 2 step profiling is to make a superior profile, not for the sake of being able to re-linearize a device later. If one can take the time to re-linearize a device than one can surely re-profile it as well.

Anyway, the concept of a 2 step profiling process is important to understand. Generic targets assume a device is perfectly linear. If it is not, a generic target will produce less than optimal results and a target that is customized for the device's nonlinear behavior will produce better results. While I've been carrying this torch for a while, I'd like to see more education and public awareness about this concept.

Scott Martin
www.on-sight.com




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