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Re: Monitor calibration software/hardware
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Re: Monitor calibration software/hardware


  • Subject: Re: Monitor calibration software/hardware
  • From: Derrick Brown <email@hidden>
  • Date: Fri, 21 Sep 2007 20:37:51 -0400


2. How can you use the same instrument to measure the accuracy of itself and
the process?



Im not saying im using the same instrument to measure the accuracy of itself. Ive never said that.


I have said, and still do, that users have nothing to start with. They have a monitor and a computer. They make a calibration to some target values they were either told about or read about. The instrument with a set of known values can be used to investigate display system performance. This is what the tool is for.

Now sure we have to "assume" the instrument is reasonable, (reason number 1 we still ship DTP94s) and for the most part they all are. Its not perfect but its way ahead of what they have, nothing. And they sure dont have access to spectroradiometers to verify their instrument.
These tools can tell the user that just because they can run a finite black point on one display doesnt mean that value will work on all of them. If they try, the validation tools can show that "monitor B" will block up compared to "monitor A" in the shadows by running these specific values. Or to find out in the color correction room that running D50 on the new LCDs allows a brightness of 100cd/m2 next to the CRTs that are now old but running D50 and can no longer achieve the brightness without losing full black? Isnt that helping improve the user experience? By using the same instrument, same software on several machines you can baseline what your systems are doing.
These validations would all be with the same instruments so the relative comparisons do apply here.


thanks

Derrick Brown
Integrated Color Corporation
81 Rogers Street
N. Billerica, MA 01862

tel: 978-670-1416
email@hidden



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