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<h2><b>spectro/dispread</b> </h2>
<h3>Summary</h3>
Display test patches on a monitor, read the colorimetric value result
with the colorimeter, and create the chart readings file. The type of
instrument is determined by the communication port
selected. Emission and display measurement instruments are supported.<br>
<br>
If you want to read a display manually rather than automatically, see <a
href="chartread.html">chartread</a> and the <a href="chartread.html#d">-d</a>
option.<br>
<h3>Usage</h3>
<small style="font-family: monospace;">dispread [-options]<i> inoutfile</i><br>
<a href="#v">-v</a>
Verbose mode<br>
</small><font size="-1"><a style="font-family: monospace;"
href="#display">-display displayname</a><span
style="font-family: monospace;"> [X11 only] Choose X11 display name<br>
</span></font><font size="-1"><span style="font-family: monospace;"> <a
href="dispwin.html#dnm">-d n[,m]</a>
[X11
only]Choose the display from the following list (default 1),<br>
and optionally choose a different display m for VideoLUT access.</span></font><br>
<font size="-1"><span style="font-family: monospace;"> <a
href="dispwin.html#d">-d n</a>
Choose the display from the following list (default 1)</span></font><small
style="font-family: monospace;"><br>
<span style="font-family: monospace;"> </span><a
style="font-family: monospace;" href="#c">-c listno</a><span
style="font-family: monospace;">
Set
communication port from the following list (default 1)</span></small><small
style="font-family: monospace;"><br>
</small><font size="-1"><span style="font-family: monospace;"> <a
href="#y">-y c|l</a>
Display type, c = CRT, l = LCD</span></font><br>
<small style="font-family: monospace;"> <span
style="text-decoration: underline;">-</span><a href="dispcal.html#k">k
file.cal</a>
Apply
display calibration file while reading<br>
<a href="#s">-s</a>
Save spectral information (default don't save)<br>
</small><font style="font-family: monospace;" size="-1"> <a
href="#p">-p ho,vo,ss</a>
Position
test window and scale it<br>
ho,vi: 0.0 = left/top, 0.5 = center, 1.0 = right/bottom etc.<br>
ss: 0.5 = half, 1.0 = normal, 2.0 = double etc.<br>
</font><font size="-1"><span style="font-family: monospace;"><a
href="#F">-F</a>
Fill whole screen with black background</span></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><small style="font-family: monospace;"> <a
href="dispread.html#K">-K</a>
Run calibration first</small><br>
<font size="-1"><span style="font-family: monospace;"> <a href="#N">-N</a>
Disable auto calibration of instrument<br>
</span></font><font size="-1"><span style="font-family: monospace;"> </span><a
style="font-family: monospace;" href="#H">-H</a><span
style="font-family: monospace;">
Use high resolution spectrum mode (if
available)<br>
</span></font><font size="-1"><span style="font-family: monospace;"> </span><a
style="font-family: monospace;" href="dispcal.html#C">-C "command"</a><span
style="font-family: monospace;">
Invoke shell "command" each
time a color is set</span></font><br>
<font size="-1"><span style="font-family: monospace;"> <a
href="dispcal.html#W">-W n|h|x</a>
Ovride serial port flow control: n = none, h = HW, x = Xon/Xoff</span></font><br>
<small style="font-family: monospace;"> <a href="#D">-D [level]</a>
Print debug
diagnostics to stderr</small><br>
<small style="font-family: monospace;"> <a href="#p1"><i>inoutfile</i></a>
Base name for input[<a href="File_Formats.html#.ti1">.ti1</a>]/output[<a
href="File_Formats.html#.ti3">.ti3</a>] file.<br>
</small>
<br>
<b>Examples</b><br>
<br>
dispread -c1 -i92 mycrt<br>
<h3>Comments<br>
</h3>
This is the utility for exercising a display, in order to measure its
color characteristics. The device test colors are defined by the
outfile.ti1 file, while the resulting device+colorimetric and optional
spectral readings are stored in the outfile.ti3 file. Display
calibration curves can be applied during the measurements, and the
curves included in the resulting .ti3 data file using the <span
style="font-weight: bold;">-k</span>flag. See <a href="dispcal.html">dispcal</a>
for information on how to calibrate the display before profiling
it. For best results, you should run this
against a neutral grey desktop background, and avoid having any bright
images or windows on the screen at the time you run it.<br>
<br>
<a name="v"></a> The <b>-v</b> flag reports progress information.<br>
<br>
<a name="display"></a>When running on a UNIX based system that used the
X11
Windowing
System, <b>dispread</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 <span style="font-weight: bold;">dispread</span>
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 <span
style="font-weight: bold;">-display</span> parameter.<br>
<span style="font-weight: bold;">Note</span> that if a calibration file
is provided using the <span style="font-weight: bold;">-k</span>
option, and the VideoLUTs for a display are not accessible, <span
style="font-weight: bold;">dispread</span>
will issue a warning , but will continue to run without initialising
the VideoLUTs . This could be because you are trying to access
a remote display, and the remote display doesn't support the
XF86VidMode extension, or perhaps you are running multiple monitors
using NVidia TwinView, or MergedFB, and trying to access anything other
than the primary monitor. TwinView and MergedFB don't properly support
the XF86VidMode extension for multiple displays. Xinerama does properly
support calibration of multiple displays. You can use <a
href="dispwin.html#r">dispwin -r</a> to test whether the VideoLUTs are
accessible for a particular display. See also below, on how to select a
different display for VideoLUT access.<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. You may be able to calibrate one screen, and then
share the calibration with another screen. Profiling can be done
independently to calibration.<br>
<br>
<a name="c"></a> The instrument is assumed to communicate through a
USB or serial communication port, and the port can be selected with the
<b>-c</b>
option,
if the instrument is not connected to the first port. If you invoke <span
style="font-weight: bold;">dispread</span>
so as to display the usage
information (i.e. "dispread -?" or "dispread --"), then the discovered
USB and serial ports will be listed. On
UNIX/Linux, a list of all possible serial ports are shown, but not all
of them may
actually be present on your system.<br>
<br>
<a name="y"></a> Display type. Colorimeters can
do a more accurate job if they know what type of display technology
they are measuring. Use <span style="font-weight: bold;">-yc</span> if
you are
calibrating a CRT (Cathode Ray Tube) type monitor, and use <span
style="font-weight: bold;">-yl</span> if you are calibrating an LCD
(Liquid Crystal Display).<br>
<br>
<a name="s"></a>By default only the colorimetric information (XYZ
value)
will be saved, but for instruments that support spectral readings (such
as
the Gretag Spectrolino), the <b>-s</b> option will save the spectral
readings
to the .ti3 file as well.<br>
<br>
<a name="k"></a> If a display video lookup table calibration <a
href="File_Formats.html#.cal">.cal</a> file is provided, it will be
applied to the display while the measurements are being taken, and also
included in the resulting .ti3 data file, so that <a
href="colprof.html">colprof</a> can include it as a <span
style="font-weight: bold;">vcgt</span> tag in the resulting
profile. The calibration file has usually been created using <a
href="dispcal.html">dispcal</a>. <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). 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>When running on a UNIX based system that used the X11
Windowing
System, <b>dispread</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="K"></a> The -<span style="font-weight: bold;">K</span> option
runs through the black and sensor
relative
calibration routines for the Xrite DTP92 and DTP94 instrument, the
black level calibration for the Eye-One Display 1, and a CRT frequency
calibration for the Eye-One Display 2. For the
black calibration the instrument should be placed on an opaque, black
surface, and any stray light should be avoided by placing something
opaque over the instrument. If a
Spectrolino
is being used, then a white and black calibration will always be
performed before
the instrument can be placed on the display, unless the <a href="#N">-N</a>
flag is used. Generally it is not necessary to do a calibration every
time an instrument is used, just now and again. There is no point in
doing a CRT frequency calibration, as this will be done
automatically
at the commencement of patch reading.<br>
<br>
<a name="N"></a>The <b>-N</b> flag disables any automatic instrument
calibration (used for the Gretag Spectrolino for instance). This would
be used when the instrument is being used for a series of measurements,
and it is inconvenient to place it on it's calibration tile between
measurements. The instrument should be calibrated at least once for
each measurement session though.<br>
<br>
<a name="H"></a> The -<span style="font-weight: bold;">H</span> option
turns on high resolution spectral mode, if the instrument supports it.
See <a href="instruments.html">Operation of particular instruments</a>
for more details.<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 dispread (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 utility 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 creating on the system running dispread.<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="p1"></a> The final parameter on the command line is the base
filename for the <a href="File_Formats.html#.ti1">.ti1</a>
input file, and the <a href="File_Formats.html#.ti3">.ti3</a> output
file. <b>dispread</b> will add the .ti1 and .ti3 extensions
automatically.<br>
<br>
<span style="font-weight: bold;">NOTE</span> that on an X11 system, if
the environment variable <span style="font-weight: bold;">ARGYLL_IGNORE_XRANDR1_2</span>
is set (ie. set it to "yes"), then the presence of the XRandR 1.2
extension will be ignored, and other extensions such as Xinerama and
XF86VidMode extension will be used. This may be a way to work around
buggy XRandR 1.2 implementations.<br>
<br>
<hr style="width: 100%; height: 2px;"><br>
If a large number of patches is being read, the screensaver on many
systems can interfere with the operation of dispread. It is therefore
advisable
in these cases to manually turn off the screensaver before commencing
the
measurements.<br>
<br>
If communications break down with a USB connected instrument, you may
have to unplug it, and plug it in again to recover.<br>
<br>
Some systems (Apple OSX in particular) have a special set of user
interface controls ("Universal Access") that allows altering the
display in ways designed to assist visually impaired users, by
increasing contrast etc. This will interfere badly with any attempts to
calibrate or profile such a system, and must be turned off in order to
do so. Note that certain magic
keyboard sequences can turn this on by accident.<br>
<br>
<br>
<br>
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distrib
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Mandriva
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2010.0
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i586
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media
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contrib-release
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by-pkgid
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56e231b080a119bc733fcd74872c9f3d
>
files
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