Novell LINUX ENTERPRISE DESKTOP 11 - APPLICATION GUIDE 17-03-2009 Application Manual page 248

21.7.2 Manipulating Color Settings
The Color menu allows you to manage all kinds of different color-related settings. Its
capabilities range from simple auto correction mechanisms to full-blown color manage-
ment via color profiles:
Auto Color Correction
If aiming for a straightforward color and exposure correction of your image, try
this option. Choose from various preset modes and apply the one that matches best.
Use the histograms to determine whether the result matches your needs.
Brightness/Contrast/Gamma
This tool offers a simple way of fixing over or underexposed images.
Hue/Saturation/Lightness
This tool helps you to optimize images that have been taken under very bright
lighting conditions and appear somewhat washed out. Bring color saturation back
to these images by manipulating the hue and saturation sliders. Depending on the
level of color, you might also want to adjust the lightness to prevent the image from
registering too dark. Of course, you can also use this tool to achieve the opposite
effect if you need to brighten up an image that has been taken at low light conditions
and contains far too much color saturation.
Color Balance
Depending on the lighting conditions under which an image was taken or the
quality of an image scan, the colors may appear somehow out of balance. Using
the color balance tool, you can try to shift the balance towards another end of the
color spectrum.
Invert
Invert the color values.
Black & White
Transform your color image into a black and white one. Use the Film, Lens Filters,
Tone, and Lightness to tweak the end product. The Film tab offers you to emulate
the effects various black and white films. To emulate color filters used with the
camera lens, use the Lens Filters tab. Note that you can only apply one filter at a
time. Using the Tone tab you can have your black and white image tinted in a par-
ticular way (sepia, for example).
234 Application Guide