CentOS 5.3

GNU/Linux	CentOS 5.3
	cameratopam(1)

pamflip

Updated: 12 April 2005
Table Of Contents

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.

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, cameratoapm
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 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, 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.

GNU/Linux man pages

Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :

ISBN : 978-2-7460-9712-4
EAN : 9782746097124
(Editions ENI)

GNU/Linux

cameratopam(1)