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<h2><b>target/targen</b></h2>
<h3>Summary</h3>
Generate a profiling test target values&nbsp;<a
 href="File_Formats.html#.ti1">.ti1</a> file. &nbsp;<b>targen</b> is
used to generate the device channel test point values for grayscale,
RGB, CMY, CMYK or N-color output or display devices.&nbsp;
<h3>Usage Summary</h3>
<small><span style="font-family: monospace;">targen [options] outfile</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;</span><a
 style="font-family: monospace;" href="#v">-v [level]</a><span
 style="font-family: monospace;">
&nbsp;&nbsp;&nbsp;&nbsp; Verbose mode [optional
verbose level, 1..n]</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;</span><a
 style="font-family: monospace;" href="#d">-d col_comb</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp; choose
colorant combination from the following:</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
0: Video grey</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp; 1: Print grey</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp; &nbsp; &nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2: Print CMY</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;
&nbsp; &nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3:
Video RGB</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp;
&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
4: CMYK</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp;
&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5:
CMYK + Light CM</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp; &nbsp; &nbsp; &nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 6: CMYK + Light CMK</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp; &nbsp;
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 7: CMYK + Red + Blue</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; &nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8: CMYK +
Orange + Green</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; &nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 9: CMYK +
Light CMK + Light Light K</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; &nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 10: CMYK +
Orange + Green + Light CM</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp; &nbsp; &nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 11: CMYK + Light
CM + Medium CM</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;</span><a
 style="font-family: monospace;" href="targen.html#D">-D colorant</a><span
 style="font-family: monospace;"> &nbsp;&nbsp;&nbsp; Add or
delete colorant from combination:</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp; &nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0: Additive</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1:
Cyan</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2: Magenta</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3: Yellow</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4: Black</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5: Orange</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 6:
Red</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
7: Green</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
8: Blue</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
9: White</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
10: Light Cyan</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
11: Light Magenta</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
12: Light Yellow</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; 13:
Light Black</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
14: Medium Cyan</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 15:
Medium Magenta</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 16:
Medium Yellow</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; 17: Medium
Black</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 18: Light Light
Black</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;</span><a
 style="font-family: monospace;" href="#e">-e patches</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; White
color test patches (default 4)</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;</span><a
 style="font-family: monospace;" href="#s">-s steps</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Single channel steps (default 0)</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;</span><a
 style="font-family: monospace;" href="#g">-g steps</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Gray axis RGB or CMY steps (default 0)</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;</span><a
 style="font-family: monospace;" href="#m">-m steps</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Multidimensional device space cube steps (default 2)</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;</span><a
 style="font-family: monospace;" href="#f">-f patches</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Add
iterative &amp; adaptive full spread patches to total (default 836)<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Default is Optimised Farthest Point Sampling (OFPS)<br
 style="font-family: monospace;">
</span><span style="font-family: monospace;">&nbsp; </span><a
 style="font-family: monospace;" href="#t">-t</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp; &nbsp; Use incremental far point for full spread</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp; </span><a
 style="font-family: monospace;" href="#r">-r</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp; &nbsp; Use device space random for full spread</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp; </span><a
 style="font-family: monospace;" href="#R">-R</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp; &nbsp; Use perceptual space random for full spread</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp; </span><a
 style="font-family: monospace;" href="#q">-q</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp; &nbsp; Use device space-filling quasi-random for full spread</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp; </span><a
 style="font-family: monospace;" href="#i">-i</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp; &nbsp; Use device space body centered cubic grid for full spread</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp; </span><a
 style="font-family: monospace;" href="#I">-I</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp; &nbsp; Use perceptual space body centered cubic grid for full
spread</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp; </span><a
 style="font-family: monospace;" href="#a">-a angle</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Simplex grid angle 0.0 - 0.5 for B.C.C. grid, default -2047840407</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp; </span><a
 style="font-family: monospace;" href="#A">-A adaptation</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Degree
of adaptation for preconditioning in OFPS 0.0 - 1.0 (default 0.0)</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;</span><a
 style="font-family: monospace;" href="#t">-t</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Use incremental far point for full spread (default
iterative)</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;</span><a
 style="font-family: monospace;" href="#l">-l ilimit</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Total
ink limit in %(default = none, or estimated from profile)</span><br
 style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;</span><a
 style="font-family: monospace;" href="#c">-c profile</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Optional device ICC or MPP pre-conditioning profile filename</span><br
 style="font-family: monospace;">
&nbsp;
<a style="font-family: monospace;" href="#F">-F L,a,b,rad</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp; Filter out
samples
outside Lab sphere.</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;</span><a
 style="font-family: monospace;" href="#w">-w</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Dump diagnostic outfile.wrl file (Lab locations)<br>
</span></small><small><span style="font-family: monospace;">&nbsp;</span><a
 style="font-family: monospace;" href="targen.html#W">-W</a><span
 style="font-family: monospace;">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Dump diagnostic outfile.wrl file (Device locations)</span></small><br
 style="font-family: monospace;">
<small><span style="font-family: monospace;"></span><span
 style="font-family: monospace;">&nbsp;</span><a
 style="font-family: monospace;" href="#p1">outfile</a><span
 style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Base name for output(.ti1)</span></small>
<br>
<h3>Usage Details and Discussion<br>
</h3>
The number of target patches needs to be chosen, depending on the media
size, the type of device, and the quality of profile required. For an
inkjet device, something like 3000 test points or more is desirable
for high quality profiles, while 500-1000 will probably suffice for a
medium quality profile. A few hundred may be sufficient for a
preliminary profile. Well behaved printing devices (such as a chemical
proof, or a high quality printing press) may produce good profiles with
1000 to 2000 test points. Well behaved RGB devices such as CRT monitors
may need only a few
hundred points, if a shaper/matrix type profile is to be produced,
while pseudo RGB printers, or other RGB devices that a CLUT type
profile may be used
with, should probably choose somewhere between 500 and 3000 patches.
For n color profile creation,
3000 or more test points should probably be used.<br>
<br>
<a name="v"></a> The <b>-v</b> flag turns on extra verbosity when
generating patch values. Extra diagnostics and verbosity may be
available if a parameter is provided with a value greater than 1.<br>
<br>
<a name="d"></a> The <b>-d</b> parameter sets the colorspace the test
values will be generated in. Video gray space is assumed to be an
additive space, where a zero device value will be black, and a maximum
device value will be white. A print gray space is assumed to be a
subtractive space,
in which a zero device value will be white, and a maximum device value
will
be black. If no colorspace is specified, subtractive CMYK is assumed as
a default.<br>
<br>
<a name="D"></a> The <b>-D</b> parameter Adds or Deletes a single
colorant from the colorspace colorant set. This flag can be specified
multiple times to build up a custom colorant combination, or delete
multiple colorants from a colorspace set. A pseudo colorant "Additive"
allows specifying an additive colorspace rather than subtractive. To
list the known colorants, use -?? or --- as a parameter.<br>
<br>
The composition of the test patches is controlled by the following
flags and parameters:<br>
<br>
<a name="e"></a> The <b>-e</b> parameter sets the number of white
colored test patches, defaulting to 4 if the -e flag isn't used. The
white patches are usually very important in establishing white point
that the ICC data is made relative to, so it improves robustness to use
more than a
single point.<br>
<br>
<a name="s"></a> The <b>-s</b> parameter sets the number of patches
in a set of per colorant wedges. The steps are evenly spaced in device
space, and the total number of test patches will be the number of
colorants
times the value specified with the -s flag. By default, no per colorant
test wedge values are generated. When creating a test chart for a
device
that will be used as a source colorspace, it is often useful to
generated
some per colorant wedge values.<br>
<br>
<a name="g"></a> The <b>-g</b> parameter sets the number of patches
in a set of combined (nominally gray) wedges. This will typically be
equal RGB or CMY values, and will be equally spaced steps in device
space. By
default, no gray combination values are generated. When creating a test
chart for a device that will be used as a source colorspace, it is
often
useful to generated some per colorant wedge values.<br>
<br>
<a name="m"></a> The <b>-m</b> parameter sets the edge size of the
multidimensional grid of test values. The total number of patches of
this type will be the -m parameter value to the power of the number of
colorants. The grid steps are evenly spaced in device space. By
default, all the device primary color combinations that fall within the
ink limit are generated..<br>
<br>
The behavior of the <b>-e</b>, <b>-s</b>, <b>-g</b> and <b>-m</b>
flags, is not to duplicate test values already created by a previous
type.<br>
<br>
<a name="f"></a> The <b>-f</b> parameter sets the number of full
spread test patches. Full spread patches are distributed according to
the default or chosen algorithm. The default algorithm will optimize
the point locations to minimize the distance from any point in device
space, to the nearest
sample point. This is called Optimized Farthest Point Sampling (OFPS) .
This can be overridden by specifying the <b>-t. -r, -R,
-q,
-i or -I</b> flags. If the default OFPS algorithm is used, then
adaptive
test
point distribution can be enabled by specifying a non-zero value for
the
<b>-A</b> parameter, which sets the degree of adaptation. A value of
1.0
distributes the test points so as to minimize the estimated error in
the
resulting profile. A value less than 1.0 is generally recommended -
e.g. try starting with a value of 0.5. Currently if a value of greater
than 0.0 is use, the distribution is not as highly optimized as it is
when the default 0.0 is used. The total number patches specified will
include any
patches
generated using the <b>-e</b>, <b>-s</b>, <b>-g</b> and <b>-m</b>
flags (i.e.
full spread patches will be added to bring the total number of patches
including
those generated using the <b>-e</b>, <b>-s</b>, <b>-g</b> and <b>-m</b>
flags
up to the specified number). When there are more than four device
channels,
the full spread distribution algorithm can't deal with so many
dimensions,
and <b>targen</b> falls back on an incremental far point distribution
algorithm
by default, that doesn't generate such evenly spread points. This
behaviour
can be forced using the <b>-t</b> flag. A <a href="#Table">table</a>
of useful total patch counts for different paper sizes is shown below.<br>
<br>
<a name="t"></a> The <b>-t</b> flag overrides the default full spread
test patch algorithm, and makes use of the Incremental Far Point
Distribution
algorithm, which incrementally searches for test points that are as far
away
as possible from any existing points. This is used as the default for
dimensions
higher than 4.<br>
<br>
<a name="r"></a> The <b>-r</b> flag overrides the default full spread
test patch algorithm, and chooses test points with an even random
distribution in device space.<br>
<br>
<a name="R"></a> The <b>-R</b> flag overrides the default full spread
test patch algorithm, and chooses test points with an even random
distribution in perceptual space.<br>
<br>
<a name="q"></a> The <b>-q</b> flag overrides the default full spread
test patch algorithm, and chooses test points with a quasi-random,
space filling distribution in device space.<br>
<br>
<a name="i"></a> The <b>-i</b> flag overrides the default full spread
test patch algorithm, and chooses test points with body centered cubic
distribution in device space.<br>
<br>
<a name="I"></a> The <b>-I</b> flag overrides the default full spread
test patch algorithm, and chooses test points with body centered cubic
distribution in perceptual space.<br>
<br>
<a name="a"></a> The <b>-a <i>angle</i></b> parameter sets the
overall
angle that the body centered grid distribution has.<br>
<br>
<a name="A"></a> The <b>-A <i>adaptation</i></b> parameter sets the
degree of adaptation to the known device characteristics, used by the
default full spread iterative &amp; adaptive algorithm.&nbsp; By
default the adapatation is 0.0, (none).<br>
<br>
<a name="l"></a> The <b>-l</b> flag and parameter sets a total ink
limit (Total
Area Coverage or TAC), which is adhered to for all the generated
points. It is generally good practice to set a test chart ink limit at
least 10% higher than the ink limit that will be applied when making
the resulting profile. In the case of device cube points, this can
generate extra test
values that lie at the ink limit boundary. For gray wedge values, any
that exceed the ink limit are omitted. Full spread test values are all
generated to lie
within the ink limit. Although it doesn't make much sense, this
parameter has an affect on additive device spaces (such as RGB), but
should not normally be used with such devices. The total ink limit
value will be written to the
.ti1 file, and carried through automatically to the .ti3 file, so that
it
can be used during profile creation. If a profile is provided using the
<span style="font-weight: bold;">-c</span> flag, then this will be used
to estimate an ink limit, if none is provided with the <span
 style="font-weight: bold;">-l</span> flag. <br>
<br>
<a name="c"></a> The <b>-c</b> flag and parameter is used to specify
an <a href="File_Formats.html#ICC">ICC</a> or <a
 href="File_Formats.html#MPP">MPP</a> pre-conditioning profile, for
estimating perceptual distances and colorspace curvature, used in
optimizing the full spread test point placement. Normally a previous
profile for this or a similar device will be used, or a simpler,
preliminary profile will be created and used. If no such profile is
specified, a default device space model is used.&nbsp; Note that this
will only have an effect if an algorithm that uses the perceptual
placement, such as <span style="font-weight: bold;">-R -I</span>, or a
<span style="font-weight: bold;">-A</span> value &gt; 0.0.<br>
<br>
<a name="F"></a> The <b>-F</b> flag and parameters is used to define
an L*a*b* sphere to filter the test points through. Only test points
within the sphere (defined by it's center and radius) will be written
to the .ti1 file. This can be good for targeting supplemental test
points at a troublesome area of a device. The accuracy of the L*a*b*
target will be best when the <span style="font-weight: bold;">-c</span>
option is used to specify a reasonably accurate profile for the device.
Note that the actual number of points generated can be hard to predict,
and will depend on the type of generation used. All means of generating
points except the -f N &amp; -r, -R and -q will generate a smaller
number of test points than expected. If the -f N &amp; -r, -R and -q
methods are used, then the target number of points will be achieved.
For this reason, the -f N -q method is probably the easiest to use.<br>
<br>
<a name="w"></a> The <b>-w</b> flag causes a diagnostic <a
 href="File_Formats.html#VRML">VRML</a> .wrl file to be created, in
which the test points are plotted as small spheres in L*a*b*
colorspace. Note that for a CMYK device, the point spacing may seem
strange, since the extra K dimension is compressed into the 3
dimensional L*a*b* space. <a name="W"></a>If the <span
 style="font-weight: bold;">-W</span> flag is given, the plot will be
in device space, with only the first 3 dimensions of each point being
plotted.<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> output
file. <b>targen</b> will add the .ti1 extension automatically.<br>
<br>
Some typical total patch number/paper size combinations are shown
below. These "magic" numbers are found by using <a
 href="printtarg.html">printtarg</a> to compute the row length and
number of rows, and then adjusting the total number of patches to fill
the last row or paper size, in an iterative fashion.<br>
<br>
<a name="Table"></a> &nbsp;&nbsp; &nbsp; Size (mm/Standard Name),
&nbsp;
No. Patches<br>
<br>
DTP20:<br>
<br>
&nbsp; &nbsp; &nbsp; 1 x A4&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; 540<br>
&nbsp; &nbsp; &nbsp; 2 x A4 &nbsp; &nbsp; &nbsp; 1080<br>
&nbsp;&nbsp; &nbsp;&nbsp; 3 x A4&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp; 1620<br>
&nbsp;&nbsp; &nbsp;&nbsp; 4 x A4&nbsp; &nbsp;
&nbsp;&nbsp; 2160<br>
<br>
&nbsp;&nbsp;&nbsp; &nbsp; 1 x Letter &nbsp;&nbsp; 570<br>
&nbsp; &nbsp; &nbsp; 2 x Letter&nbsp;&nbsp; 1140<br>
&nbsp; &nbsp;&nbsp; &nbsp;3 x Letter&nbsp;&nbsp; 1710<br>
&nbsp; &nbsp; &nbsp; 4 x Letter&nbsp;&nbsp; 2280<br>
<br>
DTP 22:<br>
<br>
&nbsp; &nbsp; &nbsp; 1 x A4&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; 782<br>
&nbsp; &nbsp; &nbsp; 2 x A4 &nbsp; &nbsp; &nbsp; 1564<br>
<br>
&nbsp;&nbsp;&nbsp; &nbsp; 1 x Letter &nbsp;&nbsp; 736<br>
&nbsp; &nbsp; &nbsp; 2 x Letter&nbsp;&nbsp; 1472<br>
<br>
&nbsp; DTP41:<br>
<br>
&nbsp; &nbsp; &nbsp; 1 x A4 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp;
&nbsp; &nbsp; 375<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2 x A4 &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp; &nbsp;
&nbsp;
&nbsp;&nbsp;&nbsp; 750<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3 x A4 &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp; &nbsp;
&nbsp;
&nbsp;&nbsp; 1125<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4 x A4 &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp; &nbsp;
&nbsp;
&nbsp;&nbsp; 1500<br>
<br>
&nbsp; &nbsp; &nbsp; 1 x Letter &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp;
&nbsp; 345<br>
&nbsp; &nbsp; &nbsp; 2 x Letter &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp;&nbsp;&nbsp;
690<br>
&nbsp; &nbsp; &nbsp; 3 x Letter &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp;&nbsp;
1035<br>
&nbsp; &nbsp; &nbsp; 4 x Letter &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp;&nbsp;
1380<br>
<br>
&nbsp;&nbsp; &nbsp;&nbsp; 1 x A3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 836<br>
&nbsp;&nbsp; &nbsp;&nbsp; 2 x A3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1672<br>
<br>
&nbsp; &nbsp; &nbsp; 1 x 11x17 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp;&nbsp; 780<br>
&nbsp; &nbsp; &nbsp; 2 x 11x17 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp; 1560<br>
<br>
<br>
&nbsp; DTP51:<br>
<br>
&nbsp; &nbsp; &nbsp; 1 x A4 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp;
&nbsp;&nbsp;&nbsp; 266<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2 x A4 &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp; &nbsp;
&nbsp;
&nbsp;&nbsp;&nbsp; 532<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3 x A4 &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp; &nbsp;
&nbsp;
&nbsp;&nbsp;&nbsp; 798<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4 x A4 &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp; &nbsp;
&nbsp;
&nbsp;&nbsp; 1064<br>
<br>
&nbsp; &nbsp; &nbsp; 1 x Letter &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp;&nbsp;
252<br>
&nbsp; &nbsp; &nbsp; 2 x Letter &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp;&nbsp;
504<br>
&nbsp; &nbsp; &nbsp; 3 x Letter &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp;&nbsp;
756<br>
&nbsp; &nbsp; &nbsp; 4 x Letter &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp; 1008<br>
<br>
&nbsp;&nbsp; &nbsp;&nbsp; 1 x A3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 580<br>
&nbsp;&nbsp; &nbsp;&nbsp; 2 x A3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 1160<br>
<br>
&nbsp; &nbsp; &nbsp; 1 x 11x17 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp; 570<br>
&nbsp; &nbsp; &nbsp; 2 x 11x17 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;
1140<br>
<br>
&nbsp; SpectroScan with square patches:<br>
<br>
&nbsp; &nbsp; &nbsp; 1 x A4R&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; 1014<br>
&nbsp; &nbsp; &nbsp; 2 x A4R &nbsp; &nbsp; &nbsp; 2028<br>
&nbsp;&nbsp; &nbsp;&nbsp; 3 x A4R&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp; 3042<br>
&nbsp;&nbsp; &nbsp;&nbsp; 4 x A4R&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp; 4056<br>
<br>
&nbsp;&nbsp;&nbsp; &nbsp; 1 x LetterR &nbsp;&nbsp; 999<br>
&nbsp; &nbsp; &nbsp; 2 x LetterR&nbsp;&nbsp; 1998<br>
&nbsp; &nbsp;&nbsp; &nbsp;3 x LetterR&nbsp;&nbsp; 2997<br>
&nbsp; &nbsp; &nbsp; 4 x LetterR&nbsp;&nbsp; 3996<br>
<br>
&nbsp; SpectroScan with hexagonal patches:<br>
<br>
&nbsp; &nbsp; &nbsp; 1 x A4R&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; 1170<br>
&nbsp; &nbsp; &nbsp; 2 x A4R &nbsp; &nbsp; &nbsp; 2340<br>
&nbsp;&nbsp; &nbsp;&nbsp; 3 x A4R&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp; 3510<br>
&nbsp;&nbsp; &nbsp;&nbsp; 4 x A4R&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp; 4680<br>
<br>
&nbsp;&nbsp;&nbsp; &nbsp; 1 x LetterR&nbsp;&nbsp; 1092<br>
&nbsp; &nbsp; &nbsp; 2 x LetterR&nbsp;&nbsp; 2184<br>
&nbsp; &nbsp;&nbsp; &nbsp;3 x LetterR&nbsp;&nbsp; 3276<br>
&nbsp; &nbsp; &nbsp; 4 x LetterR&nbsp;&nbsp; 4368<br>
<br>
&nbsp; Eye-One Pro:<br>
<br>
&nbsp; &nbsp; &nbsp; 1 x A4&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; 441<br>
&nbsp; &nbsp; &nbsp; 2 x A4 &nbsp; &nbsp; &nbsp;&nbsp; 882<br>
&nbsp;&nbsp; &nbsp;&nbsp; 3 x A4&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp; 1323<br>
&nbsp;&nbsp; &nbsp;&nbsp; 4 x A4&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp; 1764<br>
<br>
&nbsp;&nbsp;&nbsp; &nbsp; 1 x Letter &nbsp;&nbsp; 462<br>
&nbsp; &nbsp; &nbsp; 2 x Letter&nbsp;&nbsp;&nbsp; 924<br>
&nbsp; &nbsp;&nbsp; &nbsp;3 x Letter&nbsp;&nbsp; 1386<br>
&nbsp; &nbsp; &nbsp; 4 x Letter&nbsp;&nbsp; 1848<br>
<br>
&nbsp; Scanner (printtarg with -iSS -s options):<br>
<br>
&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; 1 x A4R &nbsp; &nbsp;&nbsp; 1014<br>
&nbsp; &nbsp; &nbsp; &nbsp;2 x A4R &nbsp; &nbsp;&nbsp; 2028<br>
&nbsp; &nbsp; &nbsp; &nbsp;3 x A4R &nbsp; &nbsp;&nbsp; 3042<br>
&nbsp; &nbsp; &nbsp; &nbsp;4 x A4R &nbsp; &nbsp;&nbsp; 4056<br>
<br>
&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; 1 x LetterR&nbsp;&nbsp; 962<br>
&nbsp; &nbsp; &nbsp; &nbsp;2 x LetterR&nbsp; 1924<br>
&nbsp; &nbsp; &nbsp; &nbsp;3 x LetterR&nbsp; 2886<br>
&nbsp; &nbsp; &nbsp; &nbsp;4 x LetterR&nbsp; 3848<br>
&nbsp; &nbsp; &nbsp; &nbsp;<br>
<br>
<br>
<br>
<br>
<br>
<br>
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