By default 'ufraw' displays a preview window for each raw image allowing the user to tweak the image parameters before saving. If no raw images are given at the command line, UFRaw will display a file chooser dialog. To process the images with no questions asked (and no preview) use the command 'ufraw-batch'.
The input files can be either raw images or UFRaw ID-files. ID-files contain a raw image filename and the parameters for handling the image.
UFRaw can also work as a GIMP plug-in. To activate it simply open a raw image or a UFRaw ID-file in the GIMP.
``auto'' means that UFRaw calculates the color-temperature and green color component automatically from the image data.
The white-balance can also be set manually with the --temperature and --green options.
``manual'' means that a manual tone curve is used. This is probably not very useful as a command-line option, since there is no way to specify what the curve should look like.
``linear'' means that no tone curve corrections is performed.
``custom'' means that UFRaw shall use the curve supplied by the camera in the meta-information in the raw-file.
``camera'' means that UFRaw shall use the ``custom'' curve only if the camera was set to use it (according to the meta-information). Otherwise the ``linear'' curve is used.
CURVE can be the filename (without path) of any curve that was previously loaded in the GUI.
The default is ``camera'' if such a curve exists, linear otherwise.
``manual'' means that a manual luminosity curve is used. This is probably not very useful as a command-line option, since there is no way to specify what the curve should look like.
``linear'' means that no luminosity correction is performed.
CURVE can be the filename (without path) of any curve that was previously loaded in the GUI.
The default is ``linear''.
``four-color'' is a variation of the VNG interpolation that should only be used if you see strange square patterns in the VNG interpolation, See <http://www.cybercom.net/~dcoffin/dcraw/>.
AHD is the default interpolation. AHD interpolation is not supported for cameras with four color filters, such as the Sony-828 RGBE filter. In such cases, VNG interpolation will be used instead.
The raw-files contain more than eight bits of information for each color component. This means that by using an eight bit format, you are actually discarding some of the information supplied by the camera. This is not a problem if you only plan to view the image on screen. For prints you should consider a 16 bits workflow.
This means that an option supplied on the command-line always takes precedence over all other options.
The conversion settings can be changed in the GUI before the resulting image is saved.
$HOME/.ufraw-gtkrc - An optional file for setting up a specific GTK theme for UFRaw.