COCOSTIFF(1) CMS COCOSTIFF(1)
cocostiff - color correct a TIFF stream
cocostiff [ -a source_profile | -s source_profile ] -d destination_profile
[ -h ] [ -o output_file ] [ input_file ]
cocostiff uses the International Color Consortium (ICC) profiles to
determine how to perform the appropriate color management operation
("color correction", hence "coco") upon a TIFF stream. The operation will
be a color space conversion from the input device color space to the
output device color space.
A TIFF stream is a TIFF image file in the Streamable TIFF (STIFF) format.
STIFF files are directly created by Impressario products, such as gscan.
Regular TIFF image files can by turned into STIFF files by running
/usr/lib/print/il2stiff.
The device color space associated with the input stream is determined in
one of four ways. The following approaches are tried in order:
o First, if the -s flag is set, the specified src-profile will be
used. Specifying -s will override any profile embedded in the
source image.
o Second, if there is an ICC profile embedded in the source image,
that will be used.
o Third, if the -a flag is set, the specified src_profile will be
used. Embedded profiles take precedence over profiles specified
with -a.
o Finally, the color management system's default monitor or CMYK
profile will be used. Which profile, monitor or CMYK, is selected
will be determined by the number of color channels in the input
image. If there are three channels, the monitor profile,
monitor.pf, is selected; if there are four, the CMYK profile,
gencmyk.pf.
If no default is set, the system searches through CMS_PROFILE_PATH for
the default monitor profile, monitor.pf. If that profile is not found,
cocostiff has no way to determine a source device profile and so passes
the input image stream through unchanged.
The output device color space is determined quite simply from the value
of the -d flag.
If a full path is not provided for a device profile, the system looks
through the directories specified in CMS_PROFILE_PATH.
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COCOSTIFF(1) CMS COCOSTIFF(1)
If, for any reason cocostiff is unable to perform the requested
conversion, the source stream is copied to the destination stream. Some
of the reasons that a conversion might not be performed are:
o no destination profile was specified;
o the number of channels in the input or output stream does not match
its profile;
o one of the specified profiles could not be found;
o one of the specified profiles could not be read;
o the source image is one bit deep;
o the CMS did not know how to handle one of the profiles;
o the CMS needed to read the system RGB or system CMYK profile and
could not.
Command Line Options
cocostiff supports the following command line options:
-a source_profile
Specifies a profile to be used with images that do not have an
embedded ICC profile.
-d destination_profile
Specifies a profile for the destination device. The destination
image file format, including the depth and number of channels,
will be determined by this profile. -h Display a usage
message.
-o output_file
The output TIFF file. If this is not supplied, cocostiff will
write to standard out.
-s source_profile
The profile for the source device. This will override any
profile embedded in the image. If this profile does not match
up with the source stream/source file image file format,
cocostiff will pass the source through unchanged.
input_file
The input TIFF file. If this is not supplied, cocostiff will
read from standard in.
Because cocostiff is a filter, it tries to produce valid output if at all
possible. However, there are conditions under which cocostiff will exit
with an error condition. These are:
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COCOSTIFF(1) CMS COCOSTIFF(1)
o a source file was specified, but could not be opened;
o a destination file was specified, but could not be opened;
o an unrecoverable system error.
vstiff(1), libstiff(3).
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