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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] [-bright=frac-
tion] [-no_clip_color] [-rgb] [-use_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 con-
verts 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.
-bright=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 -bright=0.25 to leave the image data completely unclipped.
-rgb Write raw camera colors to the output file. By default, cameratoapm converts to
sRGB colorspace.
-use_secondary
For cameras based on the Fuji Super CCD SR, this option causes cameratopam to use
the secondary sensors, in effect underexposing 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 proportional to brightness. With the linear option, camer-
atopam 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 sam-
ple. With -linear, the maxval is 65535, so the image contains two bytes per sam-
ple.
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(1),
HISTORY
cameratopam was new in Netpbm 10.28 (June 2005).
It was derived from the program dcraw by Dave Coffin
<http://www.cybercom.net/~dcoffin/dcraw/> , by Bryan Henderson 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 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).
DOCUMENT SOURCE
This manual page was generated by the Netpbm tool 'makeman' from HTML source. The master
documentation is at
http://netpbm.sourceforge.net/doc/cameratopam.html
netpbm documentation 12 April 2005 Cameratopam User Manual(0)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
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