Re: Photographer needs monitor recommendations(Eye-One/iCColor)
Re: Photographer needs monitor recommendations(Eye-One/iCColor)
- Subject: Re: Photographer needs monitor recommendations(Eye-One/iCColor)
- From: Terry Wyse <email@hidden>
- Date: Fri, 21 Nov 2003 07:24:08 -0500
on 11/20/03 6:33 PM, Graeme Gill wrote:
>
Terry Wyse wrote:
>
> transport time). Basing my data on 100 samples/second (Gretag's specs), I
>
> came up with around 20-30 measurements per patch on the IT8 and ECI2002
>
> targets. Even if you cut this in half, that's still a lot of samples being
>
> taken. This amount of sampling would have been unthinkable on my
>
> Spectroscan!
>
>
What point are you making though ? Number of samples doesn't equate to
>
anything in particular. 20 measurements of 50 msec duration are
>
going to capture the same number of photons as a single 1 second
>
measurement.
So, YOU'RE saying more samples per patch is no better than a single
measurement?
I guess my point was that when measuring inkjet targets that may have slight
density differences across the patches OR when measuring a press/proof
target that has halftone dots, more samples per patch can mean a better
average of that patch. I don't have a scientific study to back that up, but
intuition tells that SHOULD result in better data. It's just a hunch though.
>
The point of lots of measurements on these sorts of instruments,
>
is that it allows them to detect the edges of the patches. Samples
>
near the edges will be thrown away, and there will be dead time
>
between readings. The spectroscan spends time moving the instrument.
>
These things in themselves don't mean a whole lot. What's important
>
in the end is the repeatability of the measurement.
Yes, some samples would be tossed out which is why I stated that, of the
20-30 samples/sec. the iCColor takes, if even HALF the samples were thrown
out that that's still a lot of good samples per patch. And, as I stated
earlier, the repeatability of the iCColor seems as good or better than the
Spectroscan in some of the informal tests I've made.
I will go on my merry way comforted by the fact that I'm getting several
samples per patch for free as opposed to the 1-3 samples per patch I used to
get. Whether that's BETTER data or not is for someone else to decide. For
me, ignorance is bliss!
Terry
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