dcraw man page on CentOS

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dcraw(1)							      dcraw(1)

NAME
       dcraw - command-line decoder for raw digital photos

SYNOPSIS
       dcraw [OPTION]... [FILE]...

DESCRIPTION
       dcraw decodes raw photos, displays metadata, and extracts thumbnails.

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.

       -3     Same output as -4, written in Adobe PhotoShop format.

       -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.

       -n     Same as -H 1.

       -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 1998 D65
		   3   Wide Gamut D65
		   4   Kodak ProPhoto 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 spec‐
	      ified 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
       pgm(5),	 ppm(5),   pam(5),   pnmgamma(1),  pnmtotiff(1),  pnmtopng(1),
       gphoto2(1), cjpeg(1), djpeg(1)

BUGS
       The author stubbornly refuses to add more output formats.

       Don't expect dcraw to produce the same images as software  provided  by
       the camera vendor.  Often dcraw yields better results!

AUTHOR
       Written by David Coffin, dcoffin a cybercom o net

				 May 21, 2006			      dcraw(1)
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