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<h2><b>spectro/ccxxmake</b></h2>
<h3>Summary</h3>
For Colorimeters that rely on a calibration matrix, <span
style="font-weight: bold;">ccxxmake</span> allows creation of a
correction matrix file (<a href="File_Formats.html#.ccmx">ccmx</a>)
for a particular <span style="font-weight: bold;">Colorimeter &
Display</span> combination, by making use a reference <span
style="font-weight: bold;">Spectrometer</span> or Colorimeter
instrument. This can then be used to improve the accuracy of
subsequent measurements with that Colorimeter on that Display by
using it with the <a href="dispcal.html#X">dispcal</a>, <a
href="dispread.html#X">dispread</a> and <a href="spotread.html#X">spotread</a>
-X option. See <a href="WideGamutColmters.html">Wide Gamut Displays
and Colorimeters</a> for more information on why this may be
useful. <span style="font-weight: bold;">Note</span> that to make
use of a colorimeter as a CCMX reference, you will have to provide
two .ti3 files rather than using interactive measurement- see <a
href="#f"><span style="font-weight: bold;">-f</span></a>.<br>
<br>
For Colorimeters that have sensor spectral sensitivity calibration
information built into them (ie. the X-Rite <span
style="font-weight: bold;">i1d3</span>, and<span
style="font-weight: bold;"><span style="font-weight: bold;"></span></span>
DataColor <span style="font-weight: bold;">Spyder4</span>), <span
style="font-weight: bold;">ccxxmake</span> allows a creation of a
calibration spectral sample (<a href="File_Formats.html#.ccss">ccss</a>)
for a particular <span style="font-weight: bold;">Display</span>,
by making use a reference <span style="font-weight: bold;">Spectrometer</span>
instrument. This can then be used to improve the accuracy of
subsequent measurements on that Display using such Colorimeters, by
using it with the <a href="dispcal.html#X">dispcal</a>, <a
href="dispread.html#X">dispread</a> and <a href="spotread.html#X">spotread</a>
-X option.<br>
<br>
There is a <a href="ccmxs.html">list of contributed</a> <span
style="font-weight: bold;">ccmx</span> (Colorimeter Correction
Matrix) files.<br>
<h3>Usage Summary</h3>
<small style="font-family: monospace;">ccxxmake [-options]
correction.ccmx<br>
</small><small style="font-family: monospace;"> <a href="#v">-v</a>
Verbose mode</small><br>
<a href="#S">-S</a>
Create
CCSS
rather
than CCMX<br>
<a href="#f">-f file1.ti3[,file2.ti3]</a>
Create
from
one
or
two
.ti3 files rather than measure.<br style="font-family: monospace;">
<span style="font-family: monospace;"> </span><font
style="font-family: monospace;" size="-1"><a href="#display">-display
displayname</a> [X11 only] Choose X11 display name</font><br
style="font-family: monospace;">
<font style="font-family: monospace;" size="-1"></font><font
style="font-family: monospace;" size="-1"> <a href="#dnm">-d
n[,m]</a>
[X11 only] Choose the display from the following list (default 1),</font><br
style="font-family: monospace;">
<font style="font-family: monospace;" size="-1">
and
optionally
choose
a
different
display
m
for VideoLUT access.</font><br style="font-family: monospace;">
<font style="font-family: monospace;" size="-1"> <a href="#d">-d
n</a>
Choose
the
display
from
the
following
list
(default 1)</font><br>
<span style="font-family: monospace;"> <a href="#dweb">-dweb[:port]</a>
Display via a web server at port (default 8080)</span><br
style="font-family: monospace;">
<font style="font-family: monospace;" size="-1"> </font><font
style="font-family: monospace;" size="-1"><a href="#p">-p</a>
Use projector mode (if available)</font><br style="font-family:
monospace;">
<font size="-1"><span style="font-family: monospace;"><a
href="#y">-y X</a>
Display type - instrument specific list to choose from.</span></font><font
style="font-family: monospace;" size="-1"> (CCMX)</font><br
style="font-family: monospace;">
<font style="font-family: monospace;" size="-1"> <a href="#P">-P
ho,vo,ss</a>
Position test window and scale it</font><br style="font-family:
monospace;">
<font style="font-family: monospace;" size="-1">
ho,vi:
0.0
=
left/top,
0.5
=
center,
1.0 = right/bottom etc.</font><br style="font-family: monospace;">
<font style="font-family: monospace;" size="-1">
ss:
0.5
=
half,
1.0
=
normal,
2.0 = double etc.</font><br style="font-family: monospace;">
<font style="font-family: monospace;" size="-1"> </font><font
style="font-family: monospace;" size="-1"><a href="#F">-F</a>
Fill whole screen with black background</font><br
style="font-family: monospace;">
<small style="font-family: monospace;"> <span
style="text-decoration: underline;"></span><a href="#n">-n</a>
[X11
only]
Don't
set
override
redirect
on
test window<br>
</small><font style="font-family: monospace;" size="-1"> <a
href="#N">-N</a>
Disable auto calibration of instrument</font><small
style="font-family: monospace;"><br>
</small><span style="font-family: monospace;"> </span><font
style="font-family: monospace;" size="-1"><a href="#H">-H</a>
Use high resolution spectrum mode (if available)<br>
</font><font style="font-family: monospace;" size="-1"> <a
href="#V">-V</a>
Use adaptive measurement mode (if
available)</font><br style="font-family: monospace;">
<font style="font-family: monospace;" size="-1"> <a href="#C">-C
"command"</a>
Invoke shell "command" each time a color is set<br>
</font><small style="font-family: monospace;"> <a href="#o">-o
<i>observ</i></a>
Choose CIE Observer for CCMX spectral
data:<br>
1931_2 </small><small
style="font-family: monospace;"> (def.)</small><small
style="font-family: monospace;">, 1964_10, S&B 1955_2, shaw,
J&V 1978_2<br>
</small><font style="font-family: monospace;" size="-1"> <a
href="#s">-s steps</a>
Override
default
patch
sequence
combination steps (default 3)</font><br style="font-family:
monospace;">
<font style="font-family: monospace;" size="-1"> <a href="#W">-W
n|h|x</a>
Override
serial
port
flow
control:
n
=
none, h = HW, x = Xon/Xoff</font><br style="font-family:
monospace;">
<small style="font-family: monospace;"> <a href="#D">-D [level]</a>
Print
debug diagnostics to stderr<br>
</small><small style="font-family: monospace;"> <a
href="ccxxmake.html#E">-E "description"</a>
Override
the
default
overall
escription</small><br>
<small style="font-family: monospace;"> <a href="#I">-I
"displayname"</a> </small><span
style="font-family: monospace;">Set display make and model
description</span><small style="font-family: monospace;"><br>
</small><small style="font-family: monospace;"><a href="#T">-T
"displaytech"</a> </small><span
style="font-family: monospace;">Set display technology description</span>
(ie. CRT, LCD etc.)<small style="font-family: monospace;"></small><br
style="font-family: monospace;">
<span style="font-family: monospace;"> </span><font
style="font-family: monospace;" size="-1"><a href="#file1"><span
style="font-style: italic;">correction.ccmx</span></a> | <a
href="#file2"></a></font><font style="font-family: monospace;"
size="-1"><a href="ccxxmake.html#file2">calibration.ccss</a></font><font
style="font-family: monospace;" size="-1"><br>
File to save result to.</font><br>
<h3>Usage Details and Discussion</h3>
<a name="v"></a>The <b>-v</b> flag causes extra information to be
printed out during chartread operation.<br>
<br>
<a name="S"></a><span style="font-weight: bold;">-S</span> By
default a Colorimeter Correction Matrix (<span style="font-weight:
bold;">CCMX</span>) will be created from both <span
style="font-weight: bold;">Colorimeter</span> and <span
style="font-weight: bold;">Spectrometer</span> readings, which
allows correction for errors with a particular Colorimeter and
Display combination. If the <span style="font-weight: bold;">-S</span>
flag is used, then instead a Colorimeter Calibration Spectral Set (<span
style="font-weight: bold;">CCSS</span>) file is created from just
the <span style="font-weight: bold;">Spectrometer</span> readings,
that allows calibrating any suitable Colorimeter to the Display.<br>
<br>
<a name="f"></a><span style="font-weight: bold;">-f <span
style="font-style: italic;">file1.ti3[,file2.ti3]</span></span>
By <span style="text-decoration: underline;">default</span> <span
style="font-weight: bold;">ccxxmake</span> creates a <span
style="font-weight: bold;">CCMX</span> file by displaying test
patches on the screen, and then prompting you to measure them
interactively with the two instruments. An alternative is to create
a small number of test values using <span style="font-weight:
bold;">targen</span> suitable for display profiling (or use the <span
style="font-weight: bold;">ref/ccxx.ti1</span> file provided with
ArgyllCMS), and then measure them with the two instruments using <span
style="font-weight: bold;">dispread</span> to create a reference
and target .ti3 files, and then provide the two files as arguments
to <span style="font-weight: bold;">ccxxmake -f</span>. Normally
the reference file will be created using a spectral instrument and
you will want to use the <span style="font-weight: bold;">-s</span>
flag with dispread for this. If you want to use a colorimeter as a
reference instrument, then make sure that it is the first file
provided to the ccxxmake <span style="font-weight: bold;">-f</span>
option. The filenames should be concatenated with a <span
style="font-weight: bold;">","</span> separator without spaces.
You will also have to supply a display name using the <span
style="font-weight: bold;">-I</span> option and/or technology
description using <span style="font-weight: bold;">-T</span>.<br>
When creating a <span style="font-weight: bold;">CCSS</span> file,
only spectral readings from the display measured with the reference
instrument are needed, and a single <span style="font-weight:
bold;">.ti3</span> file should be provided.<br>
<br>
<a name="display"></a>When running on a UNIX based system that used
the X11 Windowing System, <b>ccxxmake</b> will by default use the
$DISPLAY environment variable to determine which display and screen
to read from. This can be overridden by supplying an X11 display
name to the <span style="font-weight: bold;">-display</span>
option. Note that if Xinerama is active, you can't select the screen
using $DISPLAY or -display, you have to select it using the <span
style="font-weight: bold;">-d</span> parameter.<br>
<br>
<a name="d"></a> By default the main display will be the location of
the test window. If the system has more than one display or screen,
an alternate display/screen can be selected with the <span
style="font-weight: bold;">-d</span> parameter. If you invoke <b>ccxxmake</b>
so as to display the usage information (i.e. "dispcal -?" or
"dispcal --"), then the discovered displays/screens will be listed.
Multiple displays may not be listed, if they appear as a single
display to the operating system (ie. the multi-display support is
hidden in the video card driver). On UNIX based system that used the
X11 Windowing System, the <span style="font-weight: bold;">-d</span>
parameter will override the screen specified by the $DISPLAY or
parameter.<br>
<br>
<a name="dnm"></a>Because of the difficulty cause by TwinView and
MergedFB in X11 based systems, you can optionally specify a separate
display number after the display that is going to be used to present
test patches, for accessing the VideoLUT hardware. This must be
specified as a single string, e.g. <span style="font-weight: bold;">-d
1,2</span> . Some experimentation may be needed using <a
href="dispwin.html">dispwin</a> on such systems, to discover what
screen has access to the VideoLUT hardware, and which screens the
test patches appear on.<br>
<br>
<span style="font-weight: bold;"><a name="dweb"></a>-dweb</span> or
<span style="font-weight: bold;">-dweb:port</span> starts a
standalone web server on your machine, which then allows a local or
remote web browser to display the the color test patches. By default
port <span style="font-weight: bold;">8080</span> is used, but this
can be overridden by appending a <span style="font-weight: bold;">:</span>
and the port number i.e. <span style="font-weight: bold;">-dweb:8001</span>.
The URL will be <span style="font-weight: bold;">http://</span>
then name of the machine or its I.P. address followed by a colon and
the port number - e.g something like <span style="font-weight:
bold;">http://192.168.0.1:8080</span>. If you use the verbose
option (<span style="font-weight: bold;">-v</span>) then a likely
URL will be printed once the server is started, or you could run <span
style="font-weight: bold;">ipconfig</span> (MSWin) or <span
style="font-weight: bold;">/sbin/ifconfig</span> (Linux or OS X)
and identify an internet address for your machine that way.<br>
<br>
<a name="p"></a>The <span style="font-weight: bold;">-p</span> flag
allows measuring in projector mode, using instruments that support
this.<br>
<br>
<a name="y"></a> The <span style="font-weight: bold;">-y</span>
flag allows setting the Display Type (CCMX creation). Most
colorimeters need this parameter set to operate correctly. The
selection typically determines two aspects of of the instrument
operation: <span style="font-weight: bold;">1)</span> It may set
the measuring mode to suite <a
href="http://en.wikipedia.org/wiki/Comparison_of_display_technology"><span
style="font-weight: bold;">refresh</span> or <span
style="font-weight: bold;">non-refresh</span> displays</a>.
Typically only LCD (Liquid Crystal) displays have a non-refresh
nature. <span style="font-weight: bold;">2)</span> It may select an
instrument calibration matrix suitable for a particular display
type. The selections available depends on the type and model of
instrument, and a list of the options for the discovered instruments
will be shown in the <a href="ArgyllDoc.html#CmdLine">usage</a>
information. For more details on what particular instruments support
and how this works, see <a href="instruments.html">Operation of
particular instruments</a>. Any CCMX created will work on top of
the Display Type, so to be valid, the same Display Type must be
selected whenever the CCMX is used with this instrument.<br>
<br>
<a name="P"></a> The <span style="font-weight: bold;">-P</span>
parameter allows you to position and size the test patch window. By
default it is places in the center of the screen, and sized
appropriately for the type of instrument. The <span
style="font-weight: bold;">ho</span> and <span
style="font-weight: bold;">vo</span> values govern the horizontal
and vertical offset respectively. A value of 0.0 positions the
window to the far left or top of the screen, a value of 0.5
positions it in the center of the screen (the default), and 1.0
positions it to the far right or bottom of the screen. The <span
style="font-weight: bold;">ss</span> parameter is a scale factor
for the test window size. A value of 0.5 for instance, would produce
a half sized window. A value of 2.0 will produce a double size
window. Note that the ho,vo,ss numbers must be specified as a single
string (no space between the numbers and the comma).<br>
For example, to create a double sized test window at the top right
of the screen, use <span style="font-weight: bold;">-P 1,0,2</span>
.<br>
<br>
<a name="F"></a> The <span style="font-weight: bold;">-F</span>
flag causes the while screen behind the test window to be masked
with black. This can aid black accuracy when measuring CRT displays
or projectors.<br>
<br>
<a name="n"></a><span style="font-weight: bold;">-n</span> When
running on a UNIX based system that used the X11 Windowing System, <b>dispcal</b>
normally selects the override redirect so that the test window will
appear above any other windows on the display. On some systems this
can interfere with window manager operation, and the <b>-n</b>
option turns this behaviour off.<br>
<br>
<a name="N"></a>The <b>-N</b> option disables the automatic
calibration of an instrument if it is possible to do so. Sometimes
it is awkward to have to re-calibrate and instrument every time a
tool starts, and unnecessary if the instrument has recently been
calibration, and this switch prevents it happening.<br>
<br>
<a name="L"></a> The -<span style="font-weight: bold;">H</span>
option on high resolution spectral mode, if the instrument supports
it, such as the Eye-One Pro. See <a href="instruments.html">Operation
of particular instruments</a> for more details. This may give
better accuracy for display measurements.<br>
<br>
<a name="V"></a> The -<span style="font-weight: bold;">V</span>
option uses adaptive emission measurement mode, if the instrument
supports it, such as the Eye-One Pro. This may give better accuracy
for low level measurements, but may be more inconsistent overall due
to the varying integration times. Overall measurement time will
probably be longer.<br>
<br>
<a name="C"></a> The -<span style="font-weight: bold;">C</span> <span
style="font-weight: bold;">"command" </span>option allows a
method of relaying each test value to some other display than that
on the system running dispcal (for instance, a photo frame, PDA
screen etc.), by causing the given command to be invoked to the
shell, with six arguments. The first three arguments are the RGB
test color as integers in the range 0 to 255, the second three
parameters are the RGB test color as floating point numbers in the
range 0.0 to 1.0. The script or tool should relay the given color to
the screen in some manner (e.g. by generating a raster file of the
given color and sending it to the display being profiled), before
returning. Note that a test window will also be created on the
system running dispread.<br>
<br>
<a name="o"></a> (CCMX creation) The <b>-o</b> flag allows
specifying a tristimulus observer, and is used to compute
tristimulus values from spectral readings. The following
choices are available:<br>
<b> 1931_2</b> selects the standard CIE 1931 2 degree
observer. The default.<br>
<b>1964_10</b> selects the standard CIE 1964 10 degree
observer.<br>
<b>1955_2</b> selects the Stiles and Birch 1955 2 degree
observer<br>
<b>1978_2 </b>selects the Judd and Voss 1978 2 degree
observer<br>
<b>shaw</b> selects the Shaw and Fairchild 1997 2 degree
observer<br>
<br>
<a name="s"></a>The <b>-s steps</b><span style="font-weight: bold;"></span>
parameter overrides the default number of test patch combination
steps used in measuring a colorimeter & display combination.<span
style="font-weight: bold;"></span><span style="font-weight: bold;"></span><span
style="font-weight: bold;"></span> The steps are those out
of every combination of R,G & B values of the given number of
steps that have at least one colorant at 100%. So 2 steps gives 7
test patches, 3 gives 19, 4 gives 37, 5 gives 61, 6 gives 91 etc.
Note that typically this won't make much difference to the resulting
calibration, since it depends primarily on the underlying spectral
characteristics of the display.<br>
<br>
<a name="W"></a>The <b>-W</b> <span style="font-weight: bold;">n|h|x</span>
parameter overrides the default serial communications flow control
setting. The value <span style="font-weight: bold;">n</span> turns
all flow control off, <span style="font-weight: bold;">h</span>
sets hardware handshaking, and <span style="font-weight: bold;">x</span>
sets Xon/Xoff handshaking. This commend may be useful in workaround
serial communications issues with some systems and cables. <br>
<br>
<a name="D"></a>The <b>-D</b> flag causes communications and other
instrument diagnostics to be printed to stdout. A level can be set
between 1 .. 9, that may give progressively more verbose
information, depending on the instrument. This can be useful in
tracking down why an instrument can't connect.<br>
<br>
<a name="E"></a>The <b>-E</b> parameter allows overriding the <span
style="font-weight: bold;">ccmx/ccss</span> files overall
description tag. Normally this is not necessary. With most command
line shells, it will be necessary to enclose the parameter with
double quotes, so that spaces and other special characters are
included in the parameter, and not mistaken for the start of another
flag, or as a final command line parameter. <br>
<br>
<a name="I"></a>The <b>-I</b> parameter allows setting of the
display description string in the resulting <span
style="font-weight: bold;">ccmx/ccss</span> file. Since the
default display description is probably very generic, it is <span
style="font-weight: bold;">highly recommended</span> that a
description of the make and model of the display be provided here,
or set a display technology description using <span
style="font-weight: bold;">-T</span> (see below). The default or
given display description will be printed before the menu. With most
command line shells, it will be necessary to enclose the parameter
with double quotes, so that spaces and other special characters are
included in the parameter, and not mistaken for the start of another
flag, or as a final command line parameters.<br>
<br>
<a name="I"></a>The <b>-T</b> parameter allows setting of the
display technology description string in the resulting <span
style="font-weight: bold;">ccmx/ccss</span> file. The
applicability of the calibration mainly depends on the technology
type of the display, so a description of the technology (ie. "CRT",
"LCD", "LCD + backlight type + LCD type", etc.) is <span
style="font-weight: bold;">highly recommended</span>, because it
can make the calibration more widely usable. With most command line
shells, it will be necessary to enclose the parameter with double
quotes, so that spaces and other special characters are included in
the parameter, and not mistaken for the start of another flag, or as
a final command line parameters.<br>
<br>
<a name="file1"></a>The <span style="font-weight: bold; font-style:
italic;">correction.ccmx</span> is the name of the file to save
the resulting <a href="File_Formats.html#.ccmx">Colorimeter
Correction Matrix</a> to. It is best to give it a short but
informative name that includes the Colorimeter model and the display
make and model. By convention it should have a <span
style="font-weight: bold;">.ccmx</span> file extension.<br>
<br>
<a name="file2"></a>The <span style="font-weight: bold; font-style:
italic;">correction.ccss</span> is the name of the file to save
the resulting <a href="File_Formats.html#.ccss">Colorimeter
Calibration Spectral Samples</a> to. It is best to give it a short
but informative name that includes the display technology or model.
By convention it should have a <span style="font-weight: bold;">.ccss</span>
file extension.<br>
<br>
If you are going to use the same CCMX or CCSS file all the time,
then you may want to set the <a href="Environment.html">ARGYLL_COLMTER_CAL_SPEC_SET</a>
environment variable.<br>
<br>
<hr style="width: 100%; height: 2px;">
<h3>Instrument Communications:</h3>
Unlike the other measurement utilities,<span style="font-weight:
bold;"> ccxxmake</span> doesn't connect to the instrument until it
is about to make a measurement. This allows for the possibility of
using a different instrument for each measurement.<br>
<br>
It will display a menu:<span style="font-style: italic;"></span><br>
<br>
Press 1 .. 4:<br>
1) Select an instrument, Currently 1 'usb:/bus4/dev2/ (GretagMacbeth
i1 Pro)'<br>
2) Measure test patches with current instrument<br>
3) [ Compute Colorimeter Correction Matrix & save it ]<br>
4) Exit<br>
<br>
For creating a CCMX there are two measurements to be made, after
which the correction matrix can be computed and saved. Before each
measurement, the instrument may need calibrating. For creating a
CCSS a single measurement is needed.<br>
<br>
A spectral measurement using a spectral instrument is always
needed.<br>
<br>
A measurement using the Colorimeter that the correction matrix
is being created for is needed in the case of creating a CCMX, but <span
style="font-weight: bold;">not</span> needed when creating a CCSS.<br>
<br>
There will be a message before the menu indicating which of the
measurements has been completed.<br>
<br>
<hr style="width: 100%; height: 2px;">
<h4>Display Setup:</h4>
Because ccmx/ccss is measuring spectral matching, the exact levels
of each channel is not important, so the display settings or
calibration state shouldn't make any difference to the result, as
long as it is the same for the readings of both instruments.
Similarly, the number and variety of test patches shouldn't make a
huge difference, as long as there is at least Red, Green, Blue and
White test patches.<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
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