xicc/mpplu
Summary
Lookup individual color values though an MPP profile. Also
create MPP gamut files or X3DOM
views.
Usage
mpplu [-v level] [-f func]
[-i intent] [-o order] profile.mpp
-v
Verbose
-f function f = forward, b =
backwards
-p oride x
= XYZ_PCS, l =
Lab_PCS, y = Yxy, s = spectral,
-l limit override
default
ink limit, 1 - N00%
-i illum Choose
illuminant for
print/transparency spectral data:
A, C, D50 (def.), D50M2, D65, F5, F8, F10 or file.sp
-o observ Choose CIE
Observer for spectral
data:
1931_2 (def.), 1964_10, S&B
1955_2, shaw, J&V 1978_2
-u
Use Fluorescent Whitening Agent compensation
-g
Create gamut output
-w
Create gamut X3DOM as well
-n
Don't add X3DOM axes
-a n Gamut
transparency level
-d
n Gamut
surface detail level
-t num
Invoke debugging test code
"num" 1..n
1 - check partial derivative for device
input
2 - create overlap diagnostic X3DOM gamut
surface
profile.mpp Profile to be
used
The colors to
be translated should be fed into
standard input,
one input
color per line, white space separated.
A line
starting with a # will be ignored.
A line not
starting with a number will terminate the
program.
Usage Details and Discussion
This is an analogous tool to icclu , but
applying
to MPP profile, rather than ICC profiles. Because MPP profiles
can also contain a spectral description of device behavior, there are
extra options in mpplu to describe how to convert spectral values into
CIE tristimulus values.
Some additional functionality is included in mpplu, analogous to iccgamut, allowing gamut files and images to
be generated from MPP profiles.
The -v flag causes extra information about the profile to be
printed.
The -f flag is experimental, and should be ignored.
Normally L*a*b* is displayed, but this can be changed using the the -p
flag and XYZ, Yxy, or spectral values to be be displayed.
If an illuminant, observer or Fluorescent Whitening Agent compensation
is selected, then the CIE tristimulus values will be computed from the
spectral information in the MPP profile (if present).
The -l flag overrides any default ink limit (Total Area
Coverage) recorded in the profile. The ink limit has an effect on the
results of a gamut
generated from the profile.
The -i flag allows specifying a standard or custom illumination
spectrum, applied to reflective spectral profile data to compute CIE
tristimulus
values. A, D50, D65, F5, F8, F10
are a selection of standard illuminant spectrums, with D50
being the
default. If a filename is specified instead, it will be assumed to be
an
Argyll specific .sp spectrum file.
The -o flag allows specifying a tristimulus
observer, and is used to compute PCS (Profile Connection Space)
tristimulus values. The following choices are available:
1931_2 selects the standard CIE 1931 2 degree observer.
The default.
1964_10 selects the standard CIE 1964 10 degree observer.
1955_2 selects the Stiles and Birch 1955 2 degree
observer
1978_2 selects the Judd and Voss 1978 2 degree observer
shaw selects the Shaw and Fairchild 1997 2 degree
observer
The -u flag enables Fluorescent Whitening Agent compensation,
which compensates for the effect a different illuminant will have, on
any Fluorescent Whitening Agent present in the reflective media.
The -g flag causes mpplu to simply generate a gamut surface
description from the profile, creating a .gam file with the same base name as
the given profile.
The -w flag causes the gamut surface to be generated in X3DOM format
as well as .gam format.
The -n flag suppresses the X3DOM axes.
The -a n parameter sets a transparency
level in the X3DOM surface.
The -d parameter controls the level of detail displayed in the
gamut surface. The parameter roughly corresponds to a deltaE value, so
smaller values give greater detail. The default value is around 10, and
is a good place to start. Small values may take a lot of time to
generate, and will produce big files.
The -t parameter invokes special MPP test and diagnostic output.