10:47 a.m.
Hi all,
I have downloaded the new ECI Offset profiles.
So my question is which type of rendering intent (Relative Colorimetric
or Perceptual) is most suitable with Iso Coated and Iso Webcoated profiles.
By the way, I've noticed that while using Relative Colorimetric
rendering intent there is a "fall off" of yellow ink in dark tones. (For
L=0; a=0; b=0 yellow is 54%, but for L=5; a=0; b=0 yellow is 61%)
11:28 a.m.
Hello Borislav,
- rendering intent
either perceptual (best result in most of the cases) or colorimetric
with black point compensation As you probably know black point
compensation is only available with the Adobe Color Engine or other
tools supporting black point compensation such as Heidelberg Color
Editor (Acrobat Plug-In).
- yellow decrease in dark tones:
Usually yellow ink is the last color (ink sequence in web/sheetfed
offset). Above a certain ink value yellow lightens up the color instead
of the intended effect. Just have a look at the color characterization
used for the new ECI profiles (Fogra 27 - Fogra 32). You can download
the data from www.fogra.org, open in e.g. Excel and sort by L
(lightness).
Best regards,
Florian
Am 21.06.2004 um 10:47 schrieb Borislav Ivanov:
Hi all,
I have downloaded the new ECI Offset profiles.
So my question is which type of rendering intent (Relative
Colorimetric or Perceptual) is most suitable with Iso Coated and Iso
Webcoated profiles.
By the way, I've noticed that while using Relative Colorimetric
rendering intent there is a "fall off" of yellow ink in dark tones.
(For L=0; a=0; b=0 yellow is 54%, but for L=5; a=0; b=0 yellow is 61%)
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7:29 p.m.
At 11:47 AM +0300 6/21/04, Borislav Ivanov wrote:
Hi all,
I have downloaded the new ECI Offset profiles.
So my question is which type of rendering intent (Relative Colorimetric or Perceptual) is
most suitable with Iso Coated and Iso Webcoated profiles.
The best rendering intent is typically determined by image content. If you setup
Photoshop's proof setup with the ISO profile and then turn on the gamut warning
function you should be able to see which colours in your image are most likely to be
affected by the profile. If important image detail is out of gamut then perceptual intent
is probably best. If the out-of-gamut colours are not important (or there are none) then
colorimetric may be best. I have also found that the Saturation intent can give good
results as it's in-gamut rendering is often identical to perceptual and out-of-gamut
will opt for more saturation in an acceptable way.
Regards,
Steve
________________________________________________________________________
o Steve Upton CHROMiX www.chromix.com
o (hueman) 866.CHROMiX
o upton(a)chromix.com 206.985.6837
o ColorGear ColorThink ColorValet ColorSmarts ProfileCentral
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2 comments
3 participants
participants (3)
-
Borislav Ivanov -
Florian Süßl -
Steve Upton