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NAME  SYNOPSIS  DESCRIPTION  OPTIONS  Set basic parameters  Assign  Clear  Invert  Overall Appearance  Per Channel Appearance  Show  General options  ENVIRONMENT VARIABLES  EXAMPLES  SEE ALSO  AUTHOR 

NAME

xcalib v0.11.0 − 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] 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] 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 âvcgtââtag 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.

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] ICC_FILE_NAME | −a

−g|−−gamma NUMBER

Specify Gamma (NUMBER:1 [â¥0.1 â¤5 Î0.1])

Global gamma correction value (use 2.2 for WinXP Color Control-like behaviour)

−b|−−brightness NUMBER

Specify Lightness Percentage (NUMBER:0 [â¥0 â¤99 Î1])

−k|−−contrast NUMBER

Specify Contrast Percentage (NUMBER:100 [â¥1 â¤100 Î1])

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] ICC_FILE_NAME | −a

−R|−−red-gamma NUMBER

Specify Red Gamma (NUMBER:1 [â¥0.1 â¤5 Î0.1])

−S|−−red-brightness NUMBER

Specify Red Brightness Percentage (NUMBER:0 [â¥0 â¤99 Î1])

−T|−−red-contrast NUMBER

Specify Red Contrast Percentage (NUMBER:100 [â¥1 â¤100 Î1])

Set maximum value relative to brightness.

−G|−−green-gamma NUMBER

Specify Green Gamma (NUMBER:1 [â¥0.1 â¤5 Î0.1])

−H|−−green-brightness NUMBER

Specify Green Brightness Percentage (NUMBER:0 [â¥0 â¤99 Î1])

−I|−−green-contrast NUMBER

Specify Green Contrast Percentage (NUMBER:100 [â¥1 â¤100 Î1])

Set maximum value relative to brightness.

−B|−−blue-gamma NUMBER

Specify Blue Gamma (NUMBER:1 [â¥0.1 â¤5 Î0.1])

−C|−−blue-brightness NUMBER

Specify Blue Brightness Percentage (NUMBER:0 [â¥0 â¤99 Î1])

−D|−−blue-contrast NUMBER

Specify Blue Contrast Percentage (NUMBER:100 [â¥1 â¤100 Î1])

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

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 âd :0 âs 0 âv profile_with_vcgt_tag.icc

Reset a screens hardware LUT in order to do a calibration

xcalib âd :0 âs 0 âc

SEE ALSO

oyjl-args(1)

AUTHOR

Stefan Dohla <stefan AT doehla DOT de> http://www.etg.eâtechnik.uniâerlangen.de/web/doe/xcalib/


Updated 2026-06-01 - jenkler.se | uex.se