Re: evaluating identical media in incorrect lighting conditions
Re: evaluating identical media in incorrect lighting conditions
- Subject: Re: evaluating identical media in incorrect lighting conditions
- From: Mike Syverson <email@hidden>
- Date: Wed, 28 Jan 2004 09:32:29 -0500
For problem #2 image size - this is a bigger deal than many people
realize. The ICC standard is based on 2-degree, D50 Lab. Your
thumbnail held out at the end of your arm is a rough example of an
image entering your eye at 2 degrees. Bring your thumb (or an image)
closer to your eye and it paints a considerably larger image on your
retina. This images outside of your fovea and changes the mix of rods
vs cones doing the sensing. This affects your color perception enough
that another standard observer with a 10-degree angle-of-entry was
created. So, small prints look different than big ones. I have found
that small prints don't match when larger prints (or portions of the
larger print at the same scale) match.
Steve,
I was wondering if you could explain this concept further. We do a lot
of work with grand format printers and often times deal with a very
small proof to compare to. If I have a better understanding of this
principle, it will make viewing proofs easier.
Thanks
Mike
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