From c07d0c2d2f6f7b0eb6e92cc6204bf05037957e82 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= Date: Mon, 1 Sep 2014 15:43:52 +0200 Subject: Imported Upstream version 1.6.3 --- doc/refine.html | 42 +++++++++++++++++++++++++++++++----------- 1 file changed, 31 insertions(+), 11 deletions(-) (limited to 'doc/refine.html') diff --git a/doc/refine.html b/doc/refine.html index cfe18b9..36a0ae4 100644 --- a/doc/refine.html +++ b/doc/refine.html @@ -15,15 +15,16 @@ format, but only XYZ, Lab or spectral values will be used (ie. all device space values are ignored). Typically the charts would be printed on a target system (the one being emulated, say a printing - press), and the proofing system (the one that is being profiled). - The abstract profile that refine + press, or created using an ideal target profile such as Rec709), and + the proofing system (the device that is being profiled). The + abstract profile that refine produces will be a correction that makes the proofing system behave more like the target. This can then be used to recreate the proofing systems ICC profile, or device link. By feeding a previous abstract correction profile in as well, iterative improvement can be made to the proofing reproduction.

- verify is a useful tool to use on the two + colverify is a useful tool to use on the two test charts, to check how well the refinement is proceeding. If a white point relative match is being created (refine -R), then use veryify -N.
@@ -32,14 +33,17 @@ [inabs] outabs
 -v            + Verbose
 -c            Create + initial abstract correction profile
 -g            Don't + impose output device gamut limit
 -r res        Set abstract profile clut resolution (default 33)
@@ -48,6 +52,7 @@ Don't  -R            Aim + for white point relative match rather than absolute
 -f [illum]    Use Fluorescent Whitening Agent @@ -55,6 +60,7 @@ Aim                 + M0, M1, M2, A, C, D50 (def.), D50M2, D65, F5, F8, F10 or file.sp]
 -i illum      Choose @@ -63,26 +69,33 @@ Aim                 + A, C, D50 (def.), D50M2, D65, F5, F8, F10 or file.sp
 -o observ     Choose CIE Observer for spectral data:
                 1931_2, + 1964_10, S&B 1955_2, J&V 1978_2 (def.)
 cietarget     + Target CIE or spectral values, CGATS file (e.g. .ti3)
 ciecurrent    + Actual CIE or spectral values, CGATS file (e.g. .ti3)
 [outdevicc]   + Output device ICC profile to set gamut limit (not used if -g)
 [inabs]       Previous + abstract correction ICC profile (not used if -c)
 outabs        Created/refined + abstract correction ICC profile

Usage Details

refine provides a way of improving the profile accuracy of a @@ -135,7 +148,7 @@ Created/refined illumination spectrum to be used as the similated instrument illuminant, overriding the default D50 or CIE computation illuminant used for FWA (see -i below). See colprof -f for + href="colprof.html#f">colprof -f for a fuller explanation. The same value should be used as was used during the creation of the profile.

@@ -146,7 +159,7 @@ Created/refined standard illuminant spectrums, with D50 being the default. If a filename is specified instead, it will be assumed to be an Argyll specific .sp + href="File_Formats.html#.sp">.sp 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 @@ -178,6 +191,7 @@ Created/refined cietarget         Is + the filename of the target CIE or spectral values. This is a CGATS file (e.g. a .ti3 made using outdevicc]     If + the -g flag is not used, then the output device ICC profile should be supplied here, to allow refine to limit its @@ -206,6 +221,7 @@ If  [inabs]           After + the first correction has been created, subsequent corrections need to improve upon previous ones, so the previous correction profile should be provided here. For the first correction, the outabs            The + name of the created or refined abstract correction ICC profile

Discussion

@@ -249,9 +266,9 @@ The file.

Lets check how well the proofing system current matches using - verify:
+ colverify:

-     verify  reference.ti3 chart1.ti3
+     colverify  reference.ti3 chart1.ti3

We then create our initial abstract correction fix profile fix1.icm using refine:
@@ -282,6 +299,7 @@ The the same options as you used to create your initial proofer.icm  + or target_proofer.icm, with the addition of the "-p fix1.icm" option to specify the abstract correction profile be applied.
@@ -292,9 +310,9 @@ The style="font-weight: bold;">chart2.ti3 file.

Lets check how well the proofing system matches after this first - round of refinement using verify:
+ round of refinement using colverify:

-     verify  reference.ti3 chart2.ti3
+     colverify  reference.ti3 chart2.ti3


>>>
@@ -302,6 +320,7 @@ The  We can + then start another round of improvement:

We refine our previous abstract correction fix profile using @@ -328,14 +347,15 @@ can style="font-weight: bold;">chart3.ti3 file.

Check again how well the proofing system matches after this first - round of refinement using verify:
+ round of refinement using colverify:

-     verify  reference.ti3 chart3.ti3
+     colverify  reference.ti3 chart3.ti3

Rounds of improvements can be continues by looping back to >>>, being careful to increment the names of the fixN.icm,  + proofer_fixN.icm or target_proofer_fixN.icm and chartN.ti3files. Stop when -- cgit v1.2.3