crt-calibrator.1


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.TH CRT-CALIBRATOR 1 CRT-CALIBRATOR CRT-CALIBRATOR
.SH NAME
crt-calibrator - CRT monitor calibrator utility for Linux VT
.SH SYNOPSIS
.BR crt-calibrator
.RI [ FILE ]
.SH DESCRIPTION
.B crt-calibrator
is an interactive tool that guides you through calibrating your
CRT monitors. When done, the program will print gamma-ramp
information that is useful when setting the calibrations
automatically. If
.B FILE
is specified, this information is stored in the file named
.BR FILE .
.PP
The program cannot be run from inside
.BR X ,
it is required that it is run from the
.BR Linux\ VT ,
otherwise known as the TTY.
.SH NOTES
.B crt-calibrator
should not be used to calibrate LCD (neither LED or TFT), plasma
monitors, or OLED. It should only be used to calibrate monitors
with nice gamma-curves, such as CRT monitors. Not monitors with
sigmoid-curves.
.SH RATIONALE
Few users have calibration hardware, and CRT monitors can be
sufficiently calibrated manually without it. However, before
.B crt-calibrator
the best way to calibrate CRT monitors was to use specialised
test images, with colour bars and samples. But this requires
expertise; the common user will not know how to construct these
images or the best procedure for applying the corrections. And
it is tedious if you do not find any interactive tool for
changing the settings. The alternative was to use test pictures
that relied on you deciding what looked most realistic rather
than the image itself telling you. But that is not all: to my
knowledge, this is the first program that runs outside a
display server.
.SH "SEE ALSO"
.BR analyse-gamma (1),
.BR blueshift (1)