iflTIFF(3) Image Format Library C++ Reference Manual iflTIFF(3)
NAME
iflTIFF - a TIFF formatted image file
HEADER FILE
#include <ifl/iflTIFF.h>
DESCRIPTION
The Image Format Library provides support for reading and writing image
files with the Tag Image File format (TIFF), Revision 6.0. This file
format is suitable for archiving multicolor and monochromatic image data.
As specified by the TIFF Compression field, iflTIFF supports several
compression algorithms, including:
no compression,
Group 3 Facsimile compression,
Group 4 Facsimile compression,
Lemple-Ziv & Welch compression,
PackBits compression, and
JPEG compression.
iflTIFF also uses the following TIFF 6.0 extensions:
Tilewidth (tag = 322)
Tilelength (tag = 323)
SampleFormat (tag = 339)
These tags provide the necessary support for the image data types and
tiles as defined by IL. N.B. The TIFF 6.0 tile extensions Tilewidth and
Tilelength restrict their values to be multiples of 16.
To provide the full flexibility of the IL model, additional extensions
have also been made to iflTIFF. Two new fields, Imagedepth (tag 32997)
and Tiledepth (tag 32998) have been added to define image depth (IL's z
dimension).
The default extensions for image files in the TIFF format are '.tif' and
'.tiff'. When you create a file with that extension IFL will assume you
want the TIFF format, unless you override it with the iflFormat
parameter.
In addition to all the standard iflFile methods, this format supprts an
number of format specific operations via the getItem() and setItem()
methods. The tag values supported by these methods are enumerated in the
following sections.
TAG VALUES FOR GET ITEM
The getItem() function is used to retrieve any of the TIFF 6.0 fields as
defined in the /usr/include/il/ilTIFF.h file.
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iflTIFF(3) Image Format Library C++ Reference Manual iflTIFF(3)
TAG VALUES FOR SET ITEM
The setItem() function is used to set any of the TIFF fields with the
exception of:
TIFFTAG_IMAGEWIDTH TIFFTAG_IMAGELENGTH
TIFFTAG_BITSPERSAMPLE TIFFTAG_SAMPLESPERPIXEL
TIFFTAG_ROWSPERSTRIP TIFFTAG_TILEWIDTH
TIFFTAG_TILELENGTH TIFFTAG_TILEDEPTH
TIFFTAG_DATATYPE TIFFTAG_IMAGEDEPTH
TIFFTAG_PLANARCONFIG TIFFTAG_COLORMAP
TIFFTAG_SAMPLEFORMAT
SEE ALSO
iflFile, ilFileImg, "TIFF 6.0 Specification"
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