Re: Basiccolor and/or Imageprint issue
Re: Basiccolor and/or Imageprint issue
- Subject: Re: Basiccolor and/or Imageprint issue
- From: Graeme Gill <email@hidden>
- Date: Fri, 01 Sep 2006 13:02:20 +1000
Marco Ugolini wrote:
In a message dated Aug 31, 2006 6:19 AM, Peter Karp wrote:
BTW, when using a good hardware calibrated display where the
calibration is very precise the benefit of the potential "more exact"
LUT profiles is very small.
That is not my sense of it.
Using basICColor display, I get remarkably better profiles in LUT mode (16 bits, L-Star)
> than I do in matrix mode.
My (limited) experience is more in line with Peter Karp's. I've seen a remarkable
difference between the fit of a matrix profiles to an uncalibrated vs. calibrated
display. If a gamma target curve is chosen for the calibration, then even a
single gamma-curve/matrix profile can have quite a good fit.
One advantage of a shaper or gamma/matrix profile is that it may be
noticeably smoother than a LUT based profile - the LUT table resolutions
relative coarseness may cause mach banding effects at table nodes.
One disadvantage of a gamma-curve/matrix profile is that it can't
apply gamut mapping within the profile. Even an ICCV4 matrix
display profile will have to use a LUT mechanism to apply real
gamut mapping.
Graeme Gill.
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