Using LPROF to profile monitors

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This article will explain the concept of monitor calibration and profiling.
It will also show how to build and use lprof color profiler.

Before you read

Monitor calibration is an essential step in accurate color rendering. DTP software such as Scribus makes use of monitor ICC profile to display color accurately and enable preview of publication's colors as they would appear on a printed copy.

For general use (such as watching videos, viewing family photos, etc) monitor calibration is not necessary. This article is intended for DTP and pre-press professionals who need accurate color reproduction.

Prerequisites for building lprof

In order to build the color profiler tool, lprof, you need root access. You need to be familiar with how Arch Build System (ABS for short) works and how to make packages using makepkg script and PKGBUILDS.

Moreover, in order to build lprof, you will need to build VIGRA, a computer vision library.

There exists PKGBUILDs for both components and those will be presented in this articles (in case they disappear from their original locations).

About monitor calibration

Before you proceed to following headings, you need understand some terms that will be used in this article.

Black point

Black point of the monitor is the black that is displayed when the device gets no input from the graphic card. If you display an image that has RGB values of 0, 0, 0, then you will be able to 'see' the monitor's black point.

White temperature

Also referred to as the white point, this is the color temperature of the white. The higher the temperature, the cooler the white (which runs contrary to our notion of hot and cold), and vice versa. For DTP and pre-press, the standard white point is 6500K.