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author | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2014-09-01 15:43:52 +0200 |
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committer | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2014-09-01 15:43:52 +0200 |
commit | c07d0c2d2f6f7b0eb6e92cc6204bf05037957e82 (patch) | |
tree | 41791cbe367cf023b98043fee56f9346b2592b49 /doc/targen.html | |
parent | d7f89e6fe63b8697fab5a901cfce457b375638b3 (diff) |
Imported Upstream version 1.6.3upstream/1.6.3
Diffstat (limited to 'doc/targen.html')
-rw-r--r-- | doc/targen.html | 1540 |
1 files changed, 983 insertions, 557 deletions
diff --git a/doc/targen.html b/doc/targen.html index d03416f..ee12f27 100644 --- a/doc/targen.html +++ b/doc/targen.html @@ -3,7 +3,7 @@ <head> <title>targen</title> <meta http-equiv="content-type" content="text/html; - charset=ISO-8859-1"> + charset=windows-1252"> <meta name="author" content="Graeme Gill"> </head> <body> @@ -11,65 +11,112 @@ <h3>Summary</h3> Generate a profiling test target values <a href="File_Formats.html#.ti1">.ti1</a> file. <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. + is used to generate the device channel test point values for + grayscale, RGB, CMY, CMYK or N-color output or display + devices. <h3>Usage Summary</h3> <small><span style="font-family: monospace;">targen [options] outfile</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#v">-v [level]</a><span + style="font-family: monospace;"> + Verbose mode [optional verbose level, 1..n]</span><br style="font-family: monospace;"> - Verbose mode [optional - verbose level, 1..n]</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#d">-d col_comb</a><span style="font-family: monospace;"> choose colorant combination from the following:</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - 0: - Print - grey</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + 0: Print grey</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - - - - 1: - Video - grey</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + 1: Video grey</span><br + style="font-family: monospace;"> <span style="font-family: monospace;"> - - - - - 2: - Print - RGB</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + 2: Print RGB</span><br + style="font-family: monospace;"> <span style="font-family: monospace;"> - - - 3: - Video RGB</span><br style="font-family: monospace;"> + + 3: Video RGB</span><br + style="font-family: monospace;"> <span style="font-family: monospace;"> - - - - 4: CMYK<br> - - 5: - CMY<br style="font-family: monospace;"> + + 4: CMYK<br> + + + + + + + + + + + + + + + 5: CMY<br style="font-family: monospace;"> </span><span style="font-family: monospace;"> - - - - 6: - CMYK + Light CM</span><br style="font-family: monospace;"> + + 6: CMYK + + Light CM</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - - 7: CMYK + Light CMK</span><br - style="font-family: monospace;"> + + + + + + + + + + + + + + 7: + CMYK + Light CMK</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> @@ -79,150 +126,381 @@ CMYK + Red + + + + + + + + + + + + + + Blue</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - - + 9: CMYK + Orange + Green</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - - - 10: CMYK + - Light CMK + Light Light K</span><br style="font-family: - monospace;"> + + 10: CMYK + Light CMK + + Light Light K</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - - + 11: CMYK + Orange + Green + Light CM</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - - 12: CMYK + Light - CM + Medium CM</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + 12: + CMYK + Light CM + Medium CM</span><br style="font-family: + monospace;"> <span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#D">-D colorant</a><span style="font-family: monospace;"> Add or delete colorant from combination:</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - - - - 0: - Additive</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + + 0: Additive</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - 1: - Cyan</span><br style="font-family: monospace;"> + 1: Cyan</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - - + 2: Magenta</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - - + 3: Yellow</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - - 4: - Black</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + 4: Black</span><br + style="font-family: monospace;"> <span style="font-family: monospace;"> - - 5: + + + + + + + + + + + + + + 5: Orange</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - 6: - Red</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + 6: Red</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - 7: - Green</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + 7: Green</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - 8: - Blue</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + 8: Blue</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - 9: - White</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + 9: White</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - 10: - Light - Cyan</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + 10: Light Cyan</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - 11: - Light - Magenta</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + 11: Light Magenta</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - 12: - Light - Yellow</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + 12: Light Yellow</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> + + + + + + + + + + + + + - - 13: - Light - Black</span><br style="font-family: monospace;"> + 13: Light Black</span><br style="font-family: + monospace;"> <span style="font-family: monospace;"> - 14: - Medium - Cyan</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + 14: Medium Cyan</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - 15: - Medium - Magenta</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + 15: Medium Magenta</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - 16: - Medium - Yellow</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + 16: Medium Yellow</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - - - - 17: - Medium - Black</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + 17: + Medium Black</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> - - 18: - Light - Light - Black<br> + + + + + + + + + + + + + + 18: Light + Light Black<br> <a href="#G">-G</a> - Generate - good - optimzed - points - rather - than - Fast<br style="font-family: monospace;"> + + + + + + + + + + + + + + Generate good optimzed points rather than Fast<br + style="font-family: monospace;"> </span><span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#e">-e patches</a><span style="font-family: monospace;"> White - color test patches (default 4)</span><br style="font-family: + color test patches (default 4)</span></small><br + style="font-family: monospace;"> + <small><span style="font-family: monospace;"><small><span + style="font-family: monospace;"> </span><a + style="font-family: monospace;" href="#B">-B patches</a><span + style="font-family: monospace;"> + Black test patches (default 4 Grey/RGB, else 0)<br> + </span></small></span> <span style="font-family: + monospace;"></span><a style="font-family: monospace;" href="#s">-s + + + + + + + + + + + + steps</a><span style="font-family: monospace;"> + + + + + + + + + + + + + + Single channel steps (default 0)</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> </span><a - style="font-family: monospace;" href="#s">-s steps</a><span - style="font-family: monospace;"> - Single - channel - steps - (default - 0)</span><br style="font-family: monospace;"> - <span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#g">-g steps</a><span style="font-family: monospace;"> Gray @@ -232,31 +510,101 @@ or CMY steps (default + + + + + + + + + + + + + 0)</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#m">-m steps</a><span style="font-family: monospace;"> - Multidimensional - device - space - cube - steps - (default - 2)</span><br style="font-family: monospace;"> - <span style="font-family: monospace;"> </span><a - style="font-family: monospace;" href="#f">-f patches</a><span - style="font-family: monospace;"> - Add - iterative & adaptive full spread patches to total (default - 836)<br> - - Default - is - Optimised - Farthest - Point - Sampling - (OFPS)<br style="font-family: monospace;"> + + + + + + + + + + + + + + Multidimensional device space cube steps (default 0)</span></small><br + style="font-family: monospace;"> + <small><span style="font-family: monospace;"><small><span + style="font-family: monospace;"> </span><a + style="font-family: monospace;" href="#b">-b steps</a><span + style="font-family: monospace;"> + + + + + + + + + + + + + Multidimensional body centered cubic steps (default 0)<br> + </span></small></span> <span style="font-family: + monospace;"></span><a style="font-family: monospace;" href="#f">-f + + + + + + + + + + + + + patches</a><span style="font-family: monospace;"> + + + + + + + + + + + + + + Add iterative & adaptive full spread patches to total + (default 836)<br> + + + + + + + + + + + + + + + Default is Optimised Farthest Point Sampling (OFPS)<br + style="font-family: monospace;"> </span><span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#t">-t</a><span style="font-family: monospace;"> @@ -267,6 +615,19 @@ incremental far point for + + + + + + + + + + + + + full spread</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#r">-r</a><span @@ -278,6 +639,19 @@ device space random for + + + + + + + + + + + + + full spread</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#R">-R</a><span @@ -289,6 +663,19 @@ perceptual space random for + + + + + + + + + + + + + full spread</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#q">-q</a><span @@ -300,14 +687,26 @@ device space-filling quasi-random for + + + + + + + + + + + + + full spread<br> </span></small><small><span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#Q">-Q</a><span style="font-family: monospace;"> - - Use perceptual space-filling quasi-random for full spread</span></small><br - style="font-family: monospace;"> + Use perceptual space-filling quasi-random for full + spread</span></small><br style="font-family: monospace;"> <small><span style="font-family: monospace;"></span><span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#i">-i</a><span @@ -319,6 +718,19 @@ device space body centered + + + + + + + + + + + + + cubic grid for full spread</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> </span><a @@ -331,8 +743,21 @@ perceptual space body centered - cubic grid for full - spread</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + cubic grid for full spread</span><br style="font-family: + monospace;"> <span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#a">-a angle</a><span style="font-family: monospace;"> @@ -343,14 +768,26 @@ angle - 0.5 for - B.C.C. grid, default -2047840407</span><br style="font-family: + + + + + + + + + + + + + + B.C.C. grid, default 0.333300</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#A">-A adaptation</a><span style="font-family: monospace;"> - Degree - of adaptation of OFPS 0.0 - 1.0 (default 0.1, 1.0 if -c profile - provided)</span><br style="font-family: monospace;"> + Degree of adaptation of OFPS 0.0 - 1.0 (default 0.1, 1.0 if -c + profile provided)</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#t">-t</a><span style="font-family: monospace;"> @@ -361,13 +798,38 @@ point for full spread - (default - iterative)</span><br style="font-family: monospace;"> + + + + + + + + + + + + + + (default iterative)</span><br style="font-family: monospace;"> <span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#l">-l ilimit</a><span style="font-family: monospace;"> Total ink + + + + + + + + + + + + + limit in %(default = none, or estimated from profile)<br> </span></small><small><span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#p">-p power</a><span @@ -379,104 +841,127 @@ applied to all device + + + + + + + + + + + + + values.</span></small><br style="font-family: monospace;"> <small><span style="font-family: monospace;"></span><span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#c">-c profile</a><span style="font-family: monospace;"> Optional device ICC or MPP pre-conditioning profile filename<br> - <a href="#N">-N emphasis</a> - Degree of - neutral axis patch concentration 0-1. (default 0.50)<br + <a href="#N">-N nemphasis</a> Degree of + neutral axis patch concentration 0-1. (default 0.50)</span></small><br> + <small><span style="font-family: monospace;"><small><span + style="font-family: monospace;"> <a href="#V">-V + demphasis</a> dark region patch + concentration 1.0-4.0 (default 1.0 = none)</span></small><br style="font-family: monospace;"> - </span> - <a style="font-family: monospace;" href="#F">-F L,a,b,rad</a><span - style="font-family: monospace;"> Filter out - samples - outside Lab sphere.</span><br style="font-family: monospace;"> + </span> <a style="font-family: monospace;" href="#F">-F + L,a,b,rad</a><span style="font-family: monospace;"> + + + + + + + + + + + + + Filter out samples outside Lab sphere.</span><br + style="font-family: monospace;"> <span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#w">-w</a><span style="font-family: monospace;"> - Dump - diagnostic - outfile.wrl - file - (Lab - locations)<br> + + + + + + + + + + + + + + Dump diagnostic outfile.wrl file (Lab locations)<br> </span></small><small><span style="font-family: monospace;"> </span><a style="font-family: monospace;" href="#W">-W</a><span style="font-family: monospace;"> - - Dump - diagnostic - outfile.wrl - file - (Device - locations)</span></small><br style="font-family: monospace;"> + + 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;"> </span><a style="font-family: monospace;" href="#p1">outfile</a><span style="font-family: monospace;"> - Base - name - for - output(.ti1)</span></small> - <br> + + + + + + + + + + + + + + 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 + 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> + 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> + 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 modifies the colorspace - set - by <span style="font-weight: bold;">-d</span> by allowing - individual - colorants to be added or subtracted from the colorspace.<br> + set by <span style="font-weight: bold;">-d</span> by allowing + individual colorants to be added or subtracted from the colorspace.<br> <br> <a name="G"></a> The <b>-G</b> flag changes the Incremental Far - Point - Distribution - algorithm from fast to good mode. Fast mode uses a limited number of - iterations to optimize the patch locations, while good mode strives - for - a more even patch distribution by using more iterations.<br> + Point Distribution algorithm from fast to good mode. Fast mode uses + a limited number of iterations to optimize the patch locations, + while good mode strives for a more even patch distribution by using + more iterations.<br> <br> The composition of the test patches is controlled by the following flags and parameters:<br> @@ -485,309 +970,286 @@ device 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> + use more than a single point.<br> + <br> + <a name="B"></a> The <b>-B</b> parameter sets the number of black + colored test patches, defaulting to 4 if the -B flag isn't used and + the colorspace is grey or RGB. The black point can be very important + for characterizing additive color spaces, so measuring more than one + black patch improves robustness over measuring just 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 by default, and the total number of test patches will be the - number of - colorants - times the value specified with the -s flag. If the <span - style="font-weight: bold;">-p</span> parameter is provided, then, - then the steps will be distributed according to the power value. - e.g. - the option <span style="font-weight: bold;">-s 5</span> will - generate - steps at 0.0 0.25 0.5 0.75 and 1.0, while the option <span - style="font-weight: bold;">-s 5 -p 2.0</span> will generate steps - at - 0.0 - 0.0625 0.25 0.5625 and 1.0. 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> + device space by default, and the total number of test patches will + be the number of colorants times the value specified with the -s + flag. If the <span style="font-weight: bold;">-p</span> parameter + is provided, then, then the steps will be distributed according to + the power value. e.g. the option <span style="font-weight: bold;">-s + + + + + + + + + + + + + 5</span> will generate steps at 0.0 0.25 0.5 0.75 and 1.0, while + the option <span style="font-weight: bold;">-s 5 -p 2.0</span> will + generate steps at 0.0 0.0625 0.25 0.5625 and 1.0. 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 by default will be equally spaced steps - in - device - space. If the <span style="font-weight: bold;">-p</span> parameter - is - provided, then, - then the steps will be distributed according to the power value. - e.g. - the option <span style="font-weight: bold;">-g 5</span> - will generate steps at 0.0 0.25 0.5 0.75 and 1.0, while the option <span - style="font-weight: bold;">-g 5 -p 2.0</span> will generate steps - at - 0.0 - 0.0625 0.25 0.5625 and 1.0. 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> + in device space. If the <span style="font-weight: bold;">-p</span> + parameter is provided, then, then the steps will be distributed + according to the power value. e.g. the option <span + style="font-weight: bold;">-g 5</span> will generate steps at 0.0 + 0.25 0.5 0.75 and 1.0, while the option <span style="font-weight: + bold;">-g 5 -p 2.0</span> will generate steps at 0.0 0.0625 0.25 + 0.5625 and 1.0. 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, - but if the <span style="font-weight: bold;">-p</span> parameter is - provided, then, - then the steps will be distributed according to the power value. - e.g. - the option <span style="font-weight: bold;">-m 5</span> - will generate steps at 0.0 0.25 0.5 0.75 and 1.0, while the option <span - style="font-weight: bold;">-m 5 -p 2.0</span> will generate steps - at - 0.0 - 0.0625 0.25 0.5625 and 1.0. 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> + of colorants. The grid steps are evenly spaced in device space by + default, but if the <span style="font-weight: bold;">-p</span> + parameter is provided, then, then the steps will be distributed + according to the power value. e.g. the option <span + style="font-weight: bold;">-m 5</span> will generate steps at 0.0 + 0.25 0.5 0.75 and 1.0, while the option <span style="font-weight: + bold;">-m 5 -p 2.0</span> will generate steps at 0.0 0.0625 0.25 + 0.5625 and 1.0. By default, all the device primary color + combinations that fall within the ink limit are generated..<br> + <br> + <a name="m"></a> The <b>-b</b> parameter sets the outer edge size + of the multidimensional body centered grid of test values. The total + number of patches of this type will be the -b parameter value to the + power of the number of colorants plus the (number-1) to the power of + the number of colorants. The grid steps are evenly spaced in device + space by default, but if the <span style="font-weight: bold;">-p</span> + parameter is provided, then, then the steps will be distributed + according to the power value. A body centered grid is a regular grid + (see <b>-m</b>) with another smaller regular grid within it, at the + centers of the outer grid. This grid arrangement is more space + efficient than a regular grid (ie. for a given number of test + points, it fills the space better.)<br> + <br> + The behavior of the <b>-e</b>, <b>-s</b>, <b>-g</b> <b>-m </b>and + + + + + + + + + + + + + <b>-b</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 fully enabled by supplying a previous or - typical profile with the <span style="font-weight: bold;">-c</span> - option. 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. + 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 fully enabled by supplying a previous or typical + profile with the <span style="font-weight: bold;">-c</span> option. + The total number patches specified will include any patches + generated using the <b>-e</b>, <b>-s</b>, <b>-g</b> <b>-m</b> + and <b>-b</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> <b>-m </b>and <b>-b</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. Note that it's occasionally the case that the OFPS algorithm will - fail - to complete, or make very slow progress if the <span + fail to complete, or make very slow progress if the <span style="font-weight: bold;">-c</span> profile is poor, non-smooth, - or - has unusual behaviour. In these cases a different algorithm should - be - chosen (ie. <span style="font-weight: bold;">-Q</span> or <span - style="font-weight: bold;">-I</span>), or perhaps a smoother or - lower - resolution ("quality") previous profile may overcome the problem. <br> + or has unusual behaviour. In these cases a different algorithm + should be chosen (ie. <span style="font-weight: bold;">-Q</span> or + <span style="font-weight: bold;">-I</span>), or perhaps a smoother + or lower resolution ("quality") previous profile may overcome the + problem. <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> + 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> + 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> + 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> + spread test patch algorithm, and chooses test points with a + quasi-random, space filling distribution in device 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 perceptual space.<br> + spread test patch algorithm, and chooses test points with a + quasi-random, space filling distribution in perceptual 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> + 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> + 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> + 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 OFPS algorithm. A profile - should be provided using the <span style="font-weight: bold;">-c</span> + the degree of adaptation to the known device characteristics, used + by the default full spread OFPS algorithm. A profile should be + provided using the <span style="font-weight: bold;">-c</span> parameter if <span style="font-weight: bold; font-style: italic;">adaptation</span> - is set above a low level. By - default the adaptation is 0.1 (low), and 1.0 (maximum) if <span - style="font-weight: bold;">-c profile</span> is provided, but - these - defaults can be overridden using this option. For instance, if the <span - style="font-weight: bold;">-c profile</span> doesn't represent the - device behavior very well, a lower adaption than 1.0 might be - appropriate.<br> + is set above a low level. By default the adaptation is 0.1 (low), + and 1.0 (maximum) if <span style="font-weight: bold;">-c profile</span> + is provided, but these defaults can be overridden using this option. + For instance, if the <span style="font-weight: bold;">-c profile</span> + doesn't represent the device behavior very well, a lower adaption + than 1.0 might be appropriate.<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. Ink limits are, as far - as - possible, always in final calibrated device values, and the - calibration - curves from the profile provided to the <span style="font-weight: - bold;">-c</span> flag will be used to estimate the - equivalent limit in the underlying pre-calibration device space - values - that targen creates.<br> + 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. + Ink limits are, as far as possible, always in final calibrated + device values, and the calibration curves from the profile provided + to the <span style="font-weight: bold;">-c</span> flag will be used + to estimate the equivalent limit in the underlying pre-calibration + device space values that targen creates.<br> <br> <a name="p"></a> The <b>-p</b> flag and parameter sets a power-like - value - applied to all of the device values after they are generated, <span - style="font-weight: bold;"></span><span style="font-weight: bold;"></span>the -spacer -colors. -This -can -be -useful -in - creating calibration charts for - very non-linearly behaved devices. A value greater than 1.0 will - cause - a tighter spacing of test values near device value 0.0, while a - value - less than 1.0 will cause a tighter spacing near device value 1.0. <span - style="font-weight: bold;">printcal</span> will recommend a - power-like - value if the verbose option is used. [ <span style="font-weight: - bold;">Note</span> - that for Print RGB space this - is reversed, since internally a Print RGB space is treated as a CMY - space. ]. <span style="font-weight: bold;">Note</span> that the - device - model used to create the expected patch values will not take into - account the applied power, nor will the more complex full spread - algorithms correctly take into account the power in generating - values - up to the ink limits. (A power-like function is used, to avoid the - excessive compression that a real power function would apply).<br> + value applied to all of the device values after they are generated, + <span style="font-weight: bold;"></span><span style="font-weight: + bold;"></span>the spacer colors. This can be useful in creating + calibration charts for very non-linearly behaved devices. A value + greater than 1.0 will cause a tighter spacing of test values near + device value 0.0, while a value less than 1.0 will cause a tighter + spacing near device value 1.0. <span style="font-weight: bold;">printcal</span> + will recommend a power-like value if the verbose option is used. [ <span + style="font-weight: bold;">Note</span> that for Print RGB space + this is reversed, since internally a Print RGB space is treated as a + CMY space. ]. <span style="font-weight: bold;">Note</span> that the + device model used to create the expected patch values will not take + into account the applied power, nor will the more complex full + spread algorithms correctly take into account the power in + generating values up to the ink limits. (A power-like function is + used, to avoid the excessive compression that a real power function + would apply).<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 + 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,or in creating - perceptualy spaced distributions. 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. Note that this - will only have an effect if an algorithm that uses perceptual - placement (such as <span style="font-weight: bold;">-R, -Q, -I</span> - or the default OFPS with an - <span style="font-weight: bold;">-A</span> value > 0.0) is being - used.<br> - <br> - <a name="N"></a> The <b>-N emphasis</b> parameter allows changing - the - degree to which the patch distribution should emphasise the neutral - axis. Since the neutral axis is regarded as the most visually - critical - are of the color space, it can help maximize the quality of the - resulting profile to place more measurement patches in this region. - This emphasis is only effective for perceptual patch distributions, - and - for the default OFPS distribution if the <a href="#A">adaptation</a> - parameter is set to a high value. It is also most effective when a <a - href="#c">pre-conditioning</a> profile is provided, since this is - the - only way that neutral can be determined. The default value of 0.5 - provides an affect about twice the emphasis of the CIE94 Delta E - formula.<br> + perceptualy spaced distributions. 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. Note that this will only have an + effect if an algorithm that uses perceptual placement (such as <span + style="font-weight: bold;">-R, -Q, -I</span> or the default OFPS + with an <span style="font-weight: bold;">-A</span> value > 0.0) + is being used.<br> + <br> + <a name="N"></a> The <b>-N nemphasis</b> parameter allows changing + the degree to which the patch distribution should emphasise the + neutral axis. Since the neutral axis is regarded as the most + visually critical are of the color space, it can help maximize the + quality of the resulting profile to place more measurement patches + in this region. This emphasis is only effective for perceptual patch + distributions, and for the default OFPS distribution if the <a + href="#A">adaptation</a> parameter is set to a high value. It is + also most effective when a <a href="#c">pre-conditioning</a> + profile is provided, since this is the only way that neutral can be + determined. The default value of 0.5 provides an affect about twice + the emphasis of the CIE94 Delta E formula.<br> + <br> + <a name="V"></a> The <b>-V demphasis</b> parameter allows changing + the degree to which the patch distribution should emphasis dark + region of the device response. Display devices used for video or + film reproduction are typically viewed in dark viewing environments + with no strong white reference, and typically employ a range of + brightness levels in different scenes. This often means that the + devices dark region response is of particular importance, so + increasing the relative number of sample points in the dark region + may improved the balance of accuracy of the resulting profile for + video or film reproduction. This emphasis is only effective for + perceptual patch distributions where a <a href="targen.html#c">pre-conditioning</a> + profile is provided. The default value of 1.0 provides no emphasis + of the dark regions. A value somewhere around <b>1.5 - 2.0</b> is a + good place to start for video profile use. A scaled down version of + the -V parameter will be passed on through the .ti3 file to colprof + where it will set a default value for the corresponding <a + href="colprof.html#V">colprof -V</a> parameter. Note that + increasing the proportion of dark patches will typically lengthen + the time that an instrument takes to read the whole chart. + Emphasizing the dark region characterization will reduce the + accuracy of measuring and modelling the lighter regions, given a + fixed number of test points and profile quality/grid resolution. The + parameter will also be used in an analogous way to the <small><a + href="file:///D:/src/argyll/doc/targen.html#p">-p power</a> + value in changing the distribution of </small><small><a + href="file:///D:/src/argyll/doc/targen.html#s">-s steps</a>, </small><small><a + href="file:///D:/src/argyll/doc/targen.html#g">-g steps</a>, </small><small><a + href="file:///D:/src/argyll/doc/targen.html#m">-m steps</a></small> + and <small><small><a href="file:///D:/src/argyll/doc/targen.html#b">-b + + + + steps</a></small></small> patches.<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 & -r, -R and -q will generate a smaller - number of test points than expected. If the -f N & -r, -R and -q + 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 & -r, -R and -q will generate a smaller number + of test points than expected. If the -f N & -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> @@ -798,35 +1260,29 @@ in 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> + 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> + 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> + fill the last row or paper size, in a trial and error fashion.<br> <br> <a name="Table"></a> Size (mm/Standard Name), - - No. Patches<br> + No. Patches<br> <br> DTP20:<br> <br> 1 x A4 540<br> 2 x A4 1080<br> - 3 x A4 - 1620<br> - 4 x A4 - 2160<br> + 3 x A4 1620<br> + 4 x A4 2160<br> <br> 1 x Letter 570<br> 2 x Letter 1140<br> @@ -844,41 +1300,27 @@ in DTP41:<br> <br> 1 x A4 - - - 375<br> + 375<br> 2 x A4 - - - 750<br> + 750<br> 3 x A4 - - - 1125<br> + 1125<br> 4 x A4 - - - 1500<br> + 1500<br> <br> 1 x Letter - - 345<br> + 345<br> 2 x Letter - - 690<br> + 690<br> 3 x Letter - - 1035<br> + 1035<br> 4 x Letter - - 1380<br> + 1380<br> <br> 1 x A3 - - 836<br> + 836<br> 2 x A3 - - 1672<br> + 1672<br> <br> 1 x 11x17 780<br> @@ -889,55 +1331,41 @@ in DTP51:<br> <br> 1 x A4 - - - 266<br> + 266<br> 2 x A4 - - - 532<br> + 532<br> 3 x A4 - - - 798<br> + 798<br> 4 x A4 - - - 1064<br> + 1064<br> <br> 1 x Letter - - 252<br> + 252<br> 2 x Letter - - 504<br> + 504<br> 3 x Letter - - 756<br> + 756<br> 4 x Letter 1008<br> <br> 1 x A3 - - 580<br> + 580<br> 2 x A3 - - 1160<br> + 1160<br> <br> 1 x 11x17 570<br> 2 x 11x17 - - 1140<br> + 1140<br> <br> SpectroScan with square patches:<br> <br> 1 x A4R 1014<br> 2 x A4R 2028<br> - 3 x A4R - 3042<br> - 4 x A4R - 4056<br> + 3 x A4R + 3042<br> + 4 x A4R + 4056<br> <br> 1 x LetterR 999<br> 2 x LetterR 1998<br> @@ -948,10 +1376,10 @@ in <br> 1 x A4R 1170<br> 2 x A4R 2340<br> - 3 x A4R - 3510<br> - 4 x A4R - 4680<br> + 3 x A4R + 3510<br> + 4 x A4R + 4680<br> <br> 1 x LetterR 1092<br> 2 x LetterR 2184<br> @@ -962,10 +1390,8 @@ in <br> 1 x A4 441<br> 2 x A4 882<br> - 3 x A4 - 1323<br> - 4 x A4 - 1764<br> + 3 x A4 1323<br> + 4 x A4 1764<br> <br> 1 x Letter 462<br> 2 x Letter 924<br> |