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author | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2014-09-01 13:56:46 +0200 |
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committer | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2014-09-01 13:56:46 +0200 |
commit | 22f703cab05b7cd368f4de9e03991b7664dc5022 (patch) | |
tree | 6f4d50beaa42328e24b1c6b56b6ec059e4ef21a5 /doc/profcheck.html |
Initial import of argyll version 1.5.1-8debian/1.5.1-8
Diffstat (limited to 'doc/profcheck.html')
-rw-r--r-- | doc/profcheck.html | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/doc/profcheck.html b/doc/profcheck.html new file mode 100644 index 0000000..ebb719b --- /dev/null +++ b/doc/profcheck.html @@ -0,0 +1,251 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> +<html> + <head> + <title>profcheck</title> + <meta http-equiv="content-type" content="text/html; + charset=ISO-8859-1"> + <meta name="author" content="Graeme Gill"> + </head> + <body> + <h2><b>profile/profcheck</b></h2> + <h3>Summary</h3> + Check an <a href="File_Formats.html#ICC">ICC</a> profile + against <a href="File_Formats.html#.ti3">.ti3</a> test chart + data.<br> + <h3>Usage Summary</h3> + <small><span style="font-family: monospace;">profcheck + [-options] + data.ti3 iccprofile.icm</span><br style="font-family: + monospace;"> + + <span style="font-family: monospace;"></span></small><small><span + style="font-family: monospace;">-v + [level] + Verbosity level (default 1), 2 to print each DE</span></small><small><span + style="font-family: monospace;"></span><br style="font-family: + monospace;"> + <span style="font-family: monospace;"> -c + +Show + CIE94 delta E values</span><br style="font-family: monospace;"> + <span style="font-family: monospace;"> -k + + Show CIEDE2000 delta E values</span><br + style="font-family: monospace;"> + <span style="font-family: monospace;"> -w + +create + VRML visualization (iccprofile.wrl)</span><br + style="font-family: monospace;"> + <span style="font-family: monospace;"> -x + +Use + VRML axes<br> + -m +Make +VRML + lines a minimum of 0.5<br style="font-family: monospace;"> + </span><span style="font-family: monospace;"> -e +Color +vectors + acording to delta E</span><br style="font-family: monospace;"> + <span style="font-family: monospace;"> -d + devval1,deval2,devvalN</span><br style="font-family: monospace;"> + <span style="font-family: monospace;"> + +Specify + a device value to sort + against</span><br style="font-family: monospace;"> + <span style="font-family: monospace;"> -p + +Sort + device value by PCS/Lab target</span><br style="font-family: + monospace;"> + + <span style="font-family: monospace;">-f + [illum] Use Fluorescent Whitening + Agent compensation [opt. simulated inst. illum.:<br> + + M0, M1, M2, A, C, D50 (def.), D50M2, D65, F5, F8, F10 or + file.sp]<br> + -i illum Choose + illuminant for computation of CIE XYZ from spectral data & + FWA:<br> + + A, C, D50 (def.), D50M2, D65, F5, F8, F10 or file.sp</span><span + style="font-family: monospace;"></span><br style="font-family: + monospace;"> + <span style="font-family: monospace;"> -o + observ + Choose CIE + Observer + for spectral data:</span><br style="font-family: monospace;"> + <span style="font-family: monospace;"></span></small><small><span + style="font-family: monospace;"> + 1931_2 + </span></small><small><span style="font-family: monospace;">(def.)</span></small><small><span + style="font-family: monospace;">, + 1964_10, S&B + 1955_2, shaw, J&V 1978_2</span></small><small><span + style="font-family: monospace;"><br> + -I intent r = relative + colorimetric, a = absolute (default)<br style="font-family: + monospace;"> + </span><i style="font-family: monospace;"> data.ti3</i><span + style="font-family: monospace;"> + + Test + point data file</span><br style="font-family: monospace;"> + <i style="font-family: monospace;"> iccprofile.icm</i><span + style="font-family: monospace;"> Profile to check</span></small> + <br> + <h3>Usage Details and Discussion</h3> + <b> profcheck</b> provides a way of checking how well an <a + href="File_Formats.html#ICC">ICC</a> profile conforms to the test + sample data that was used to create it (or other test samples + that are from the same device). This is the same sort of check done + within + the profile making tool (<a href="colprof.html">colprof</a>), but + having a + separate tool provides some flexibility. The absolute forward + table in the profile is used to create PCS values from the sample + points, and the profiles PCS value then compared to the PCS values + of + the measured sample points. Note the lower delta E values are not + always a better measure of how good a profile is. The aim of a + profile + is to model the underlying characteristics of a device, not to + slavishly reproduce the sampled data point values. Sampled data + point + values contain device variation and instrument reading inaccuracies, + and a good profiler will try and filter out this noise, resulting in + some deliberate differences between the profile and the sample + points + used to create it.<br> + <br> + The <b>-v</b> flag prints out extra information during the + checking. A + value greater than 1 will print the color values of each test point.<br> + <br> + The <b>-c</b> option causes the differences between the test values + and + the profile prediction of the color for each device value to be + displayed + in CIE94 delta E, rather than plain L*a*b* delta E. CIE94 delta E + has a + closer + correspondence with perceived color differences than the default + CIE76 + delta E values.<br> + <br> + The <b>-k</b> option causes the differences between the test values + and + the profile prediction of the color for each device value to be + displayed + in CIEDE2000 delta E, rather than plain L*a*b* delta E. CIEDE2000 + delta + E has a + closer + correspondence with perceived color differences than either CIE76 or + CIE94 delta E values.<br> + <br> + The <b>-w</b> creates a <a href="File_Formats.html#VRML">VRML</a> + 3D + visualization + of the differences between the test points and the profiles + prediction + of + the resulting colors.<br> + <br> + The <b>-x</b> flag adds Lab axes to the VRML output.<br> + <br> + The <b>-m</b> flag makes each error line a minimum of 0.5 delta E + long, so that all the points are visible. This makes it easier to + view + the distribution of test points in the reference set.<br> + <br> + The <span style="font-weight: bold;">-e</span> flag causes the + error + vectors in the VRML output to be color coded according to their + lengths, from longest to shortest: yellow, red, magenta, blue, cyan + and + green.<br> + <br> + The <b>-d</b> parameters allow the specification of a particular + device value, + and the test point by test point output will be sorted by distance + from + the + given device value. This can be useful in determining how well + "supported" + the profile is in a particular area of the colorspace.<br> + <br> + If the <b>-p </b>flag is used in combination with the <b>-d</b> + parameters, + then the test point by test point output will be sorted by distance + in + PCS + (Lab) space rather than distance in device space.<br> + <br> + The <b>-f</b> flag enables Fluorescent Whitening Agent (FWA) + compensation. This only works if spectral data is available and, the + instrument is not UV filtered. FWA compensation adjusts the + spectral samples so that they appear to have been measured using an + illuminant that has a different level of Ultra Violet to the one the + instrument actually used in the measurement. The optional + illumination parameter allows specifying a standard or custom + illumination spectrum to be used as the similated instrument + illuminant, overriding the default <b>D50</b> or CIE computation + illuminant used for FWA (see <b>-i</b> below<b>). </b>See <a + href="file:///D:/src/argyll/doc/colprof.html#f">colprof -f</a> for + a fuller explanation. The same value should be used as was used + during the creation of the + profile.<br> + <br> + The <b>-i</b> flag allows specifying a standard or custom + illumination + spectrum, applied to the spectral test point values to compute CIE + tristimulus values. <b>A</b>, <b>D50</b>, <b>D50M2, D65</b>, <b>F5</b>, + <b>F8</b>, <b>F10</b> are a selection of standard illuminant + spectrums, with <b>D50</b> being the default. If a filename is + specified instead, it will be assumed to be an Argyll specific <a + href="file:///D:/src/argyll/doc/File_Formats.html#.sp">.sp</a> + spectrum file. If FWA compensation is used during measurement, this + illuminant will be used by default as the simulated instrument + illuminant. The same value should be used as was used during the + creation of the + profile.<br> + <br> + <a name="o"></a> The <b>-o</b> flag allows specifying a tristimulus + observer, and is used to compute PCS (Profile Connection Space) + tristimulus values. The following choices are available:<br> + <b> 1931_2</b> selects the standard CIE 1931 2 degree + observer. + The default.<br> + <b>1964_10</b> selects the standard CIE 1964 10 degree + observer.<br> + <b>1955_2</b> selects the Stiles and Birch 1955 2 degree + observer<br> + <b>1978_2 </b>selects the Judd and Voss 1978 2 degree + observer<br> + <b>shaw</b> selects the Shaw and Fairchild 1997 2 degree + observer<br> + <br> + The same parameter value should be used as was used during the + creation + of the profile.<br> + <br> + The <span style="font-weight: bold;">-I</span> parameter allows + changing the intent used in looking up the ICC profile colors to + relative colorimetric. This would <span style="text-decoration: + underline;">not</span> be used if you are + checking a profile against the .ti3 file that was used to create it, + since, since profiles are always made + from absolute colorimetric measurement values.<br> + <br> + <br> + <br> + <br> + <br> + </body> +</html> |