(http://ufraw.sourceforge.net/Colors.html)
provides a brief description of the plug-in’s
color profiling functionality as well as
providing a handful of pre-defined camera
profiles for you to try out. All color
management features are included in their
own tab, where you can load camera profiles
and select ICC output and display profiles. By
default, UFRawprovides only an sRGB ICC
profile, but you can use other ICC profiles,
too, such as the AdobeRGB color profile
available at ufraw.sourceforge.net/Colors/
AdobeRGB1998.icc. The Color management
tab also allows you to adjust midtone
brightness and contrast using the Gammaand
Linearitysliders.
To adjust contrast and saturation, switch to
the Correctionstab. You can adjust saturation
using the appropriate slider and tweak the
curve to adjust the brightness of the image.
As with base curves, you can load and apply
existing curve files and save modified curves
for later use. The ’Auto adjust black point’
button can be used to fix images that look
washed out, while the ’Auto adjust curve’
button can be used to boost contrast by
flattening the histogram.
The Lightness Adjustmentstab includes a
tool for increasing or reducing the hue (i.e.,
lightness) of up to three specified colors
within an image. All you have to do is select a
color using the color picker and use the slider
to adjust its lightness. Repeat these steps for
your other two colors if necessary.
Although you can open processed RAW
files directly in GIMPfor further retouching
and editing, you can also use the options in
the Savetab to export your file to one of the
supported formats, which include PPM, PNG,
TIFF and JPEG. You can also specifiy the
compression level for JPEG files, enable EXIF
metadata and specify a range of other
options.
The features mentioned here are just a few
to get you started, and UFRawoffers a wide
range of other useful features such as lens
correction tools, crop and rotation, black and
white conversion capabilities and much more
besides. Take a look at the user guide at
ufraw.sourceforge.net/Guide.html to learn
how to get the most out of this powerful RAW
processing plug-in.
Using GIMP Scripts to Tweak
Photos and Apply Image Effects
Virtually every GIMPaction can be automated
using Python scripts, and the official GIMP
plug-in repository (http://registry.gimp.org/)
contains hundreds of ready-made scripts that
you can use to enhance and tweak your photos
with a minimum of effort. To install a script,
GIMP Add-ons | RAW Development- The EvenTone plug-in is perfect for enhancing
portraits. The script can be used to smooth skin
tones as well as remove small blemishes. - The Contrast Fix script offers a quick and easy way to
fix under- and overexposure as well as providing shadow
and burned-out highlight recovery functionality