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NAME
crt-calibrator - CRT monitor calibrator utility for Linux VT
SYNOPSIS
crt-calibrator [FILE]
DESCRIPTION
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 FILE is specified, this
information is stored in the file named FILE.
The program cannot be run from inside X, it is required that
it is run from the Linux VT, otherwise known as the TTY.
NOTES
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.
RATIONALE
Few users have calibration hardware, and CRT monitors can
be sufficiently calibrated manually without it. However,
before 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.
SEE ALSO
analyse-gamma(1), blueshift(1)
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