NAME
xcalib v0.12.0 - Monitor Calibration Loader
SYNOPSIS
xcalib ICC_FILE_NAME
xcalib -c -d STRING -s NUMBER [-o NUMBER] [-v]
xcalib -i -d STRING -s NUMBER [-o NUMBER] [-v] [-n] [-p[=FORMAT]] [-l] ICC_FILE_NAME | -a
xcalib -g NUMBER -b NUMBER -k NUMBER -d STRING -s NUMBER [-o NUMBER] [-v] [-n] [-p[=FORMAT]] [-l] [-c] ICC_FILE_NAME | -a
xcalib -R NUMBER -G NUMBER -B NUMBER -d STRING -s NUMBER [-S NUMBER] [-T NUMBER] [-H NUMBER] [-I NUMBER] [-C NUMBER] [-D NUMBER] [-o NUMBER] [-v] [-n] [-p[=FORMAT]] [-l] [-c] ICC_FILE_NAME | -a
xcalib -p[=FORMAT] -d STRING -s NUMBER [-o NUMBER] [-v]
xcalib -h[=synopsis|...] -V --render STRING [-v]
DESCRIPTION
The tool loads ’vcgt’‐tag of ICC profiles to the server using the XRandR/XVidMode/GDI Extension in order to load calibrate curves to your graphics card.
OPTIONS
Set basic parameters
-d|--display STRING host:dpy
-s|--screen NUMBER Screen Number
-o|--output NUMBER Output Number
It appears in the order as listed in xrandr tool.
-a|--alter Alter Table
Works according to parameters without ICC Profile.
-n|--noaction Do not alter video-LUTs.
Work's best in conjunction with -v!
-p|--printramps[=FORMAT] Print Values on stdout.
-p TEXT # TEXT
-p SVG # SVG
-l|--loss Print error introduced by applying ramps to stdout.
-c|--clear Clear Gamma LUT
Reset the Video Card Gamma Table (VCGT) to linear values.
Assign
xcalib ICC_FILE_NAME
ICC_FILE_NAME File Name of a ICC Profile
Clear
xcalib -c -d STRING -s NUMBER [-o NUMBER] [-v]
-c|--clear Clear Gamma LUT
Reset the Video Card Gamma Table (VCGT) to linear values.
Invert
xcalib -i -d STRING -s NUMBER [-o NUMBER] [-v] [-n] [-p[=FORMAT]] [-l] ICC_FILE_NAME | -a
-i|--invert Invert the LUT
Overall Appearance
xcalib -g NUMBER -b NUMBER -k NUMBER -d STRING -s NUMBER [-o NUMBER] [-v] [-n] [-p[=FORMAT]] [-l] [-c] ICC_FILE_NAME | -a
-g|--gamma NUMBER Specify Gamma (NUMBER:1 [≥0.1 ≤5 Δ0.1])
Global gamma correction value (use 2.2 for WinXP Color Control-like behaviour)
-b|--brightness NUMBER Specify Lightness Percentage (NUMBER:0 [≥0 ≤99 Δ1])
-k|--contrast NUMBER Specify Contrast Percentage (NUMBER:100 [≥1 ≤100 Δ1])
Set maximum value relative to brightness.
Per Channel Appearance
xcalib -R NUMBER -G NUMBER -B NUMBER -d STRING -s NUMBER [-S NUMBER] [-T NUMBER] [-H NUMBER] [-I NUMBER] [-C NUMBER] [-D NUMBER] [-o NUMBER] [-v] [-n] [-p[=FORMAT]] [-l] [-c] ICC_FILE_NAME | -a
-R|--red-gamma NUMBER Specify Red Gamma (NUMBER:1 [≥0.1 ≤5 Δ0.1])
-S|--red-brightness NUMBER Specify Red Brightness Percentage (NUMBER:0 [≥0 ≤99 Δ1])
-T|--red-contrast NUMBER Specify Red Contrast Percentage (NUMBER:100 [≥1 ≤100 Δ1])
Set maximum value relative to brightness.
-G|--green-gamma NUMBER Specify Green Gamma (NUMBER:1 [≥0.1 ≤5 Δ0.1])
-H|--green-brightness NUMBER Specify Green Brightness Percentage (NUMBER:0 [≥0 ≤99 Δ1])
-I|--green-contrast NUMBER Specify Green Contrast Percentage (NUMBER:100 [≥1 ≤100 Δ1])
Set maximum value relative to brightness.
-B|--blue-gamma NUMBER Specify Blue Gamma (NUMBER:1 [≥0.1 ≤5 Δ0.1])
-C|--blue-brightness NUMBER Specify Blue Brightness Percentage (NUMBER:0 [≥0 ≤99 Δ1])
-D|--blue-contrast NUMBER Specify Blue Contrast Percentage (NUMBER:100 [≥1 ≤100 Δ1])
Set maximum value relative to brightness.
Show
xcalib -p[=FORMAT] -d STRING -s NUMBER [-o NUMBER] [-v]
-p|--printramps[=FORMAT] Print Values on stdout.
-p TEXT # TEXT
-p SVG # SVG
GENERAL OPTIONS
General options
xcalib -h[=synopsis|...] -V --render STRING [-v]
-h|--help[=synopsis|...] Print help text
Show usage information and hints for the tool.
-h - # Full Help : Print help for all groups
-h synopsis # Synopsis : List groups - Show all groups including syntax
--render STRING Render
-V|--version Version
-v|--verbose Verbose
ENVIRONMENT VARIABLES
- DISPLAY
-
Under X11 systems this variable will hold the display name as used for the -d and -s option.
EXAMPLES
- Assign the VCGT curves of a ICC profile to a screen
-
xcalib ‐d :0 ‐s 0 ‐v profile_with_vcgt_tag.icc
- Reset a screens hardware LUT in order to do a calibration
-
xcalib ‐d :0 ‐s 0 ‐c
SEE ALSO
- oyjl-args(1)
AUTHOR
Stefan Dohla <stefan AT doehla DOT de>
http://www.etg.e‐technik.uni‐erlangen.de/web/doe/xcalib/
COPYRIGHT
Copyright © 2013-2026 Kai-Uwe Behrmann
License: GPL-2.0 https://opensource.org/license/gpl-2.0