ufraw(1)
NAME
UFRaw - Convert camera RAW images to standard image files.
SYNOPSIS
ufraw [OPTIONS] <rawfile(s)> ufraw-batch [OPTIONS] <rawfile(s)>
DESCRIPTION
The Unidentified Flying Raw (UFRaw) is a utility to read and manipulate raw images from digital cameras. It reads raw images using Dave Coffin's raw conversion utility - DCRaw. UFRaw supports basic color management using Little CMS, allowing the user to apply color profiles. For Nikon users UFRaw has the advantage that it can read the camera's tone curves. Even if you don't own a Nikon, you can still apply a Nikon curve to your images. 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.
OPTIONS
The options supplied on the command-line decide the starting-values for
the GUI. The GUI will then allow you to tweak these values before
saving the final image.
General Options
--version
Display the version of UFRaw and exit.
--help
Display a brief description of how to use UFRaw and exit.
--maximize-window
Force window to be maximized.
--silent
Do not display any messages during conversion. This option is only
valid with 'ufraw-batch'.
--conf=<ID-filename>
Load all parameters from an ID-file. This feature can be used to
tweak the parameters for one file using the GUI and using those
parameters as the starting point for other images as well.
Image Manipulation Options
These command-line options override settings from the default
configuration of UFRaw and from any loaded ID-file. The best way to
learn about how these parameters work is to experiment with the GUI.
All parameters correspond exactly to a setting available in the GUI.
Not all parameters in the GUI have corresponding command-line options.
--wb=camera|auto
White balance setting. "camera" means that UFRaw tries to read the
color-temperature and green color component that the camera
recorded in the meta-information in the raw-file. This does not
work for all cameras. If UFRaw fails to read the white-balance
information from the meta-information, it falls back to "auto".
"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.
--temperature=TEMP
Manually set the color temperature in Kelvin.
--green=GREEN
Green color component. Range 0.20 to 2.50.
--gamma=GAMMA
Gamma adjustment of the base curve. Range 0.10 to 1.00. Default
0.45.
--linearity=LINEARITY
Linearity of the base curve. Range 0.00 to 1.00. Default 0.10.
--exposure=auto|EXPOSURE
Auto exposure or exposure correction in EV. Range -3.00 to 3.00.
Default 0.
--restore=clip|lch|hsv
Control how highlights are restored when applying negative EV.
'clip' restores nothing and is therefore safe from any artifacts.
'lch' restores in LCH space, resulting in restored highlights with
soft details (good for clouds). 'hsv' restores in HSV space,
resulting in restored highlights with sharp details. The default
is 'lch'.
--clip=digital|film
Control how highlights are clipped when applying positive EV.
'digital' corresponds to using a linear response, emulating the
harsh behaviour of the digital sensor. 'film' emulate the soft
film response. The default is 'digital'.
--saturation=SAT
Adjust the color saturation. Range 0.00 to 8.00. Default 1.0, use 0
for black & white output.
--wavelet-denoising-threshold=THRESHOLD
Wavelet denoising threshold (default 0.0).
--hotpixel-sensitivity=VALUE
Sensitivity for detecting and shaving hot pixels (default 0.0).
--base-curve=manual|linear|custom|camera|CURVE
Type of tone curve to use. The base curve is a combination of the
gamma curve corrected by the curve specified here. The base curve
is applied to each channel of the raw data after the white balance
and color matrix, but before the ICC transformation.
"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.
--base-curve-file=<curve-file>
Load the base curve from a file. The curve file format can be
either UFRaw's XML format or Nikon's NTC/NCV format.
--curve=manual|linear|CURVE
Type of luminosity curve to use. This curve is applied in HSV space
and therefore hue and saturation should not be effected by it.
"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".
--curve-file=<curve-file>
Load the luminosity curve from a file. The curve file format can
be either UFRaw's XML format or Nikon's NTC/NCV format.
--black-point=auto|BLACK
Black-point value. Range 0.0 to 1.0, default 0.0.
--interpolation=ahd|vng|four-color|ppg|bilinear
Interpolation algorithm to use when converting from the color
filter array to normal RGB values. AHD (Adaptive Homogeneity
Directed) interpolation is the best, but also the slowest. VNG
(Variable Number Gradients) is second best and a bit faster.
Bilinear is the simplest yet fastest interpolation.
"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.
--color-smoothing
Apply color smoothing.
--grayscale=none|lightness|luminance|value|mixer
Grayscale conversion algorithm to use (default none).
--grayscale-mixer=RED,GREEN,BLUE
Grayscale mixer values to use (default 1,1,1).
--darkframe=FILE
Use FILE for raw darkframe subtraction.
Output Options
The options which are related to the final output are:
--shrink=FACTOR
Shrink the image by FACTOR (default 1).
--size=SIZE
Downsize max(height,width) to SIZE.
--rotate=camera|ANGLE|no
Rotate image to camera's setting, by ANGLE degrees clockwise, or do
not rotate the image (default camera)
--crop-(left|right|top|bottom)=PIXELS
Crop the output to the given pixel range, relative to the raw image
after rotation but before any scaling.
--auto-crop
Crop the output automatically.
--aspect-ratio X:Y
Set crop area aspect ratio.
--lensfun=none|auto
Do not apply lens correction or try to apply correction by auto-
detecting the lens (default auto).
--out-type=ppm|tiff|tif|png|jpeg|jpg|fits
Output file-format to use. The default output file-format is ppm.
--out-depth=8|16
Output bit depth per channel. ppm, tiff, png and fits output
formats can uses either 8 bits or 16 bits to encode each of the
Red, Green and Blue components of each pixel. The jpeg format only
allows for 8 bits for each color component.
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.
--compression=VALUE
JPEG quality factor. Range 0-100 with a higher number giving a
higher quality at the cost of a larger file. Default 85. The
--compression parameter is only relevant if the output file-format
is jpeg.
--[no]exif
Embed exif in output. Default embed exif. Exif is currently
embedded in JPEG, PNG and TIFF output.
--[no]zip
Enable [disable] TIFF zip compression. The zip-compression is loss-
less. Default nozip. The --zip parameter is only relevant if the
output file-format if tiff8 or tiff16.
--out-path=PATH
PATH for output file. In batch mode by default, output-files are
placed in the same directory as the input-files. In interactive
mode UFRaw tries to ''guess'' if you have a favorite output
directory.
--output=FILE
Output file name to use. This is only relevant if a single raw-file
is supplied on the command-line. . Use '-' to output to stdout. The
default is to name the output-file the same as the input-file but
with the extension given by the output file-format.
--overwrite
Overwrite existing files without asking. Default is to ask before
deleting an existing file.
--create-id=no|also|only
Control whether UFRaw ID files are created for the output image.
(Default is no).
--embedded-image
Extract the preview image embedded in the raw file instead of
converting the raw image. This option is only valid with
'ufraw-batch'.
Conversion Setting Priority
Conversion settings are applied in the following priority order: 1. Command-line options 2. Settings from the configuration file specified with --conf=<ID-file> (ignoring any filenames in the ID-file). 3. Settings from an ID-file supplied as an input-file. 4. Settings from $HOME/.ufrawrc 5. UFRaw's default settings. 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.
FILES
$HOME/.ufrawrc or $HOME/.config/ufrawrc (depending on the system) - UFRaw resource file containing the user default settings. This is an XML file that can be modified with any text editor. Still, it is recommended not to edit this file. This file is updated from the GUI when you save an image, or when you explicitly ask to save this file in the 'Options' menu. $HOME/.ufraw-gtkrc - An optional file for setting up a specific GTK theme for UFRaw.
ONLINE RESOURCES
UFRaw homepage: <http://ufraw.sourceforge.net> DCRaw homepage: <http://www.cybercom.net/~dcoffin/dcraw>
SEE ALSO
The GIMP homepage: <http://www.gimp.org>
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