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.
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"