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Cameratopam User Manual(0)                          Cameratopam User Manual(0)

NAME
       cameratopam - convert raw camera image to PAM

SYNOPSIS
       cameratopam

       [input_file_name]

       [-identify_only]  [-quick_interpolate]  [-half_size]  [-four_color_rgb]
       [-document_mode] [-balance_auto]  [-balance_camera]  [-red_scale=float]
       [-blue_scale=float]   [-brightness=fraction]   [-no_clip_color]  [-rgb]
       [-secondary] [-linear] [-verbose]

       All options can be abbreviated to their shortest  unique  prefix.   You
       may use two hyphens instead of one to designate an option.  You may use
       either white space or an equals sign between an  option  name  and  its
       value.

DESCRIPTION
       This program is part of Netpbm(1)

       cameratopam  converts from any of dozens of raw camera image formats to
       PAM.

       Digital still cameras often can produce images in a special raw  format
       in  addition  to  something  more standard such as TIFF or JFIF (JPEG).
       Software supplied with the camera allows you to  manipulate  the  image
       using  information which is lost when the camera converts to the common
       format.  A particular camera model often has a unique raw format.

OPTIONS
       -identify_only
              Report to Standard Error the format of the input image but don't
              generate  an output image.  Program fails if it cannot recognize
              the format.

       -verbose
              Report to Standard Error details of the processing.

       -quick_interpolate
              Use  simple  bilinear  interpolation  for  quick  results.   The
              default is to use a slow, high-quality adaptive algorithm.

       -half_size
              Half-size  the  output  image.  Instead of interpolating, reduce
              each 2x2 block of  sensors  to  one  pixel.   Much  faster  than
              -quick_interpolate.

       -four_color_rgb
              Interpolate  RGB  as  four colors.  This causes a slight loss of
              detail, so use this only if you see false 2x2 mesh  patterns  in
              blue sky.

       -document_mode
              Show  the  raw  data as a grayscale image with no interpolation.
              This is good for photographing black and white documents.

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

       -balance_camera
              Use  the  color balance specified by the camera.  If cameratopam
              can't find this, it prints a warning and reverts to the default.

       -red_scale=float

       -blue_scalefloat
              Further adjust the color balance by multiplying the red and blue
              channels by these values.  Both default to 1.0.

       -brightness=float
              Change the output brightness.  Default is 1.0.

       -no_clip_color
              By default, cameratoapm clips all colors to prevent pink hues in
              the  highlights.   Combine  this option with -brightness=0.25 to
              leave the image data completely unclipped.

       -rgb   Write raw camera colors to the output file.  By default, camera-
              toapm converts to sRGB colorspace.

       -secondary
              For  cameras  based on the Fuji Super CCD SR, this option causes
              cameratopam to use the secondary sensors, in effect  underexpos-
              ing  the image by four stops to reveal detail in the highlights.
              cameratopam silently ignores this option for all other  cameras.

       -linear
              This  option  causes  cameratopam to generate a variation on PAM
              that has 'linear' color samples.  In true PAM,  each  sample  in
              the image raster is gamma-corrected; i.e. it is essentially pro-
              portional to brightness.  With the  linear  option,  cameratopam
              generates an image in which the samples are instead proportional
              to light intensity.

              Without -linear, the image maxval is 255, so the image  contains
              one  byte per sample.  With -linear, the maxval is 65535, so the
              image contains two bytes per sample.

              Without -linear, cameratopam uses a 99th percentile white point.
              With -linear, it doesn't.  I don't know what that means.

SEE ALSO
       411toppm(1) , pamflip(1) , pam(5) ,

HISTORY
       cameratopam was new in Netpbm 10.28 (June 2005).

       It was derived from the program dcraw by Dave Coffin , by Bryan Hender-
       son in April 2005.  Bryan replaced the part that generates  the  Netpbm
       output  image  and  removed the Adobe Photoshop output function.  Bryan
       changed the command syntax and and made other small changes to make the
       program  consistent  with  Netpbm.   He also split the source code into
       manageable pieces (dcraw has a single 5000 line source file).

netpbm documentation             12 April 2005      Cameratopam User Manual(0)
 

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