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NAME

dcraw - command-line decoder for raw digital photos
 

SYNOPSIS

DESCRIPTION

OPTIONS

-v

Print verbose messages, not just warnings and errors.

-c

Write decoded images or thumbnails to standard output.

-e

Extract the camera-generated thumbnail, not the raw image. You'll get either a JPEG or a PPM file, depending on the camera.

-z

Change the access and modification times of an AVI, JPEG or raw file to when the photo was taken, assuming that the camera clock was set to Universal Time.

-i

Identify files but don't decode them. Exit status is 0 if dcraw can decode the last file, 1 if it can't. -i -v shows metadata.

dcraw cannot decode JPEG files!!

-d

Show the raw data as a grayscale image with no interpolation. Good for photographing black-and-white documents.

-D

Same as -d, but totally raw (no color scaling).

-h

Output a half-size color image. Twice as fast as -q 0.

-q 0

Use high-speed, low-quality bilinear interpolation.

-q 2

Use Variable Number of Gradients (VNG) interpolation.

-q 3

Use Adaptive Homogeneity-Directed (AHD) interpolation.

-f

Interpolate RGB as four colors. Use this if the output shows false 2x2 meshes with VNG or mazes with AHD.

-B sigma_domain sigma_range

Use a bilateral filter to smooth noise while preserving edges. sigma_domain is in units of pixels, while sigma_range is in units of CIELab colorspace. Try -B 2 4 to start.

-b brightness

By default, dcraw writes 8-bit PGM/PPM/PAM with a BT.709 gamma curve and a 99th-percentile white point. If the result is too light or too dark, -b lets you adjust it. Default is 1.0.

-4

Write 16-bit linear pseudo-PGM/PPM/PAM with no gamma curve, no white point, and no -b option.

-T

Write TIFF output (with metadata) instead of PGM/PPM/PAM.

-k black

Set the black point. Default depends on the camera.

-a

Automatic color balance. The default is to use a fixed color balance based on a white card photographed in sunlight.

-w

Use the color balance specified by the camera. If this can't be found, print a warning and revert to the default.

-r mul0 mul1 mul2 mul3

Specify your own raw color balance. These multipliers can be cut and pasted from the output of dcraw -v.

-H 0

Clip all highlights to solid white (default).

-H 1

Leave highlights unclipped in various shades of pink.

-H 2-9

Reconstruct highlights. Low numbers favor whites; high numbers favor colors. Try -H 5 as a compromise. If that's not good enough, do -H 9, cut out the non-white highlights, and paste them into an image generated with -H 3.

-m

Same as -o 0.

-o [0-5]

Select the output colorspace when the -p option is not used:

0   Raw color (unique to each camera)
1   sRGB D65 (default)
2   Adobe RGB (1998) D65
3   Wide Gamut RGB D65
4   Kodak ProPhoto RGB D65
5   XYZ

-p camera.icm [ -o output.icm ]

Use ICC profiles to define the camera's raw colorspace and the desired output colorspace (sRGB by default).

-p embed

Use the ICC profile embedded in the raw photo.

-t [0-7,90,180,270]

Flip the output image. By default, dcraw applies the flip specified by the camera. -t 0 disables all flipping.

-j

For Fuji Super CCD cameras, show the image tilted 45 degrees, so that each output pixel corresponds to one raw pixel.

-s

For Fuji Super CCD SR cameras, use the secondary sensors, in effect underexposing the image by four stops to reveal detail in the highlights.

For all other cameras, -j and -s are silently ignored.

SEE ALSO

AUTHOR

Index

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

SEE ALSO

AUTHOR

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