In order to view
images accurately on a computer, your monitor should be
calibrated. Although there are no set standards for monitor
calibration in the personal computer world, some simple adjustments to
the brightness and contrast controls can usually improve the
full tonal range and accuracy of the image.
The image below lets
you check and adjust the color intensity scales for the most important
What to look for:
1. The intensity
of each color should increase uniformly from black to maximum
2. None of the
hues should change with intensity -- a color tracking error.
3. All of the
colors should fade uniformly to black together.
4. All of the
brightest steps should be distinct; otherwise, the image is
How to make
If you're having serious color problems, first degauss the
monitor. If you have a Degauss button, simply press it;
otherwise, turn the monitor off for at least 15 minutes and then
turn it on again. Also, check the video cables and termination
switches, if your monitor has them.
Adjust the Brightness and Contrast controls. Adjust the
Brightness control first; this affects the darker blocks. Then
adjust the Contrast control, which affects the brighter blocks.
You can change the overall color balance if the monitor has
Color Temperature, White Balance, or RGB Drive controls.
If any of the hues change with intensity, you can correct the
problem if the monitor has RGB Background or Cutoff controls.
If your graphics card has Gamma Correction or Transfer Function
controls, they may be the source of the problem. Alternatively, you
can use them to correct the problem.