From 22f703cab05b7cd368f4de9e03991b7664dc5022 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= Date: Mon, 1 Sep 2014 13:56:46 +0200 Subject: Initial import of argyll version 1.5.1-8 --- doc/invprofcheck.html | 133 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 133 insertions(+) create mode 100644 doc/invprofcheck.html (limited to 'doc/invprofcheck.html') diff --git a/doc/invprofcheck.html b/doc/invprofcheck.html new file mode 100644 index 0000000..9851774 --- /dev/null +++ b/doc/invprofcheck.html @@ -0,0 +1,133 @@ + + + + invprofcheck + + + + +

profile/invprofcheck

+

Summary

+Check ICC forward against reverse +lookup. +
+

Usage Summary

+usage: invprofcheck +[-options] profile.icm
+ -v [level]   +verbosity level (default 1), 2 to print each DE
+ -l +limit     set total ink +limit (estimate by default)
+ -L +klimit    set black channel ink +limit (estimate by default)
+ -h           +high res test (27)
+ -u           +Ultra high res test (61)
+ -R res       Specific grid +resolution
+ -c           +Show CIE94 delta E values
+ -k           +Show CIEDE2000 delta E values
+ -w           +create VRML visualisation (profile.wrl)
+ -x           +Use VRML axes
+ -e           +Color vectors acording to delta E
+ profile.icm  +Profile to check +
+

Usage Details and Discussion

+invprofcheck provides a way of checking how well an ICC profile inverse transform inverts +the forward transform. For devices with more than 4 channels, a total +ink limit is assumed, and (if no -l +parameter is given) a reasonable number is deduced from the reverse +table. A grid of device values is created, and the transform from +PCS->device, and then device->PCS is computed in L*a*b* space. +The average, maximum and RMS error delta E values are computed and +displayed in the chosen delta E metric. A VRML plot of the error vectors can +be created. invprofcheck tries +to only test in-gamut color values. Note that because it scans a device +grid, for a CMYK device, the density of test points will be +progressively higher in the dark regions, and the average and RMS +values will be distorted by the denser sampling.
+
+The -v flag prints out extra information during the checking. A +value greater than 1 will print the color values of each test point.
+
+The -l flag allows setting a total ink limit (TAC) for printing +devices. If a device has a total ink limit, and hasn't been +characterised with device values above this limit, then plotting the +gamut in these areas will almost certainly be misleading. The ink limit +will be in final calibrated device values if the profile includes +calibration information.
+
+The -L flag allows setting a black channel ink limit for +printing +devices. If a device has a black ink limit, and hasn't been +characterised with device values above this limit, then plotting the +gamut in these areas will almost certainly be misleading. The black ink +limit +will be final calibrated device values if the profile +includes calibration information.
+
+The default device grid is relativy low, and 11 (ie. 11 x 11 x 11 for +an RGB device, 11 x 11 x 11 x 11 for a CMYK device etc.).
+
+The -h flag selects a higher +device grid resolution of 27.
+
+The -u flag selects an +extremely high device grid resolution of 61. This will probably take a +long time to run.
+
+The -G res option allows a +specific grid resolution to be used.
+
+The -c option causes the error differences 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.
+
+The -k option causes the error differences 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.
+
+The -w creates a VRML 3D +visualization +of the differences between the test points and the profiles prediction +of +the resulting colors.
+
+The -x flag adds Lab axes to the VRML output.
+
+The -e 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.
+
+
+
+ + -- cgit v1.2.3