NAME

       tiffgt - display an image stored in a TIFF file (Silicon Graphics version)

SYNOPSIS

       tiffgt [ options ] input.tif ...

DESCRIPTION

       tiffgt  displays  one or more images stored using the Tag Image File Format, Revision 6.0.
       Each image is placed in a fixed size window that the user must  position  on  the  display
       (unless  configured  otherwise  through  X  defaults).   If  the display has fewer than 24
       bitplanes, or if the image does not warrant full color, then RGB color values  are  mapped
       to  the  closest  values  that  exist in the colormap (this is done using the rgbi routine
       found in the graphics utility library -lgutil.)

       tiffgt correctly handles files with any of the following characteristics:
            BitsPerSample              1, 2, 4, 8, 16
            SamplesPerPixel            1, 3, 4 (the 4th sample is ignored)
            PhotometricInterpretation  0 (min-is-white), 1 (min-is-black), 2 (RGB), 3 (palette), 6 (YCbCr)
            PlanarConfiguration        1 (contiguous), 2 (separate)
            Orientation                1 (top-left), 4 (bottom-left)
       Data may be organized as strips or tiles and may be compressed with any of the compression
       algorithms supported by the libtiff(3) library.

       For  palette images (PhotometricInterpretation=3), tiffgt inspects the colormap values and
       assumes either 16-bit or 8-bit values according to the maximum  value.   That  is,  if  no
       colormap  entry  greater  than  255  is  found, tiffgt assumes the colormap has only 8-bit
       values; otherwise it assumes 16-bit values.  This inspection is done to handle old  images
       written by previous (incorrect) versions of libtiff.

       tiffgt  can  be  used  to  display  multiple  images one-at-a-time.  The left mouse button
       switches the display to the first image in the next file in the list of files specified on
       the command line.  The right mouse button switches to the first image in the previous file
       in the list.  The middle mouse button causes the first image in the first  file  specified
       on  the  command  line  to  be displayed.  In addition the following keyboard commands are
       recognized:

       b      Use a PhotometricInterpretation of MinIsBlack in displaying the current image.

       l      Use a FillOrder of lsb-to-msb in decoding the current image.

       m      Use a FillOrder of msb-to-lsb in decoding the current image.

       c      Use a colormap visual to display the current image.

       r      Use a true color (24-bit RGB) visual to display the current image.

       w      Use a PhotometricInterpretation of MinIsWhite in displaying the current image.

       W      Toggle (enable/disable) display of warning messages  from  the  TIFF  library  when
              decoding images.

       E      Toggle  (enable/disable)  display  of  error  messages  from  the TIFF library when
              decoding images.

       z      Reset    all    parameters    to     their     default     settings     (FillOrder,
              PhotometricInterpretation, handling of warnings and errors).

       PageUp Display  the  previous  image in the current file or the last image in the previous
              file.

       PageDown
              Display the next image in the current file or the first image in the next file.

       Home   Display the first image in the current file.

       End    Display the last image in the current file (unimplemented).

OPTIONS

       -c     Force image display in a colormap window.

       -d     Specify an image to display by directory number.  By default the first image in the
              file is displayed.  Directories are numbered starting at zero.

       -e     Enable  reporting  of  error  messages  from  the  TIFF library.  By default tiffgt
              silently ignores images that cannot be read.

       -f     Force tiffgt to run as a foreground process.  By default tiffgt will  place  itself
              in the background once it has opened the requested image file.

       -l     Force the presumed bit ordering to be LSB to MSB.

       -m     Force the presumed bit ordering to be MSB to LSB.

       -o     Specify an image to display by directory offset.  By default the first image in the
              file is displayed.  Directories offsets may be specified using C-style syntax; i.e.
              a leading ``0x'' for hexadecimal and a leading ``0'' for octal.

       -p     Override  the  value of the PhotometricInterpretation tag; the parameter may be one
              of: miniswhite, minisblack, rgb, palette, mask, separated, ycbcr, and cielab.

       -r     Force image display in a full color window.

       -s     Stop on the first read error.  By default all errors in the input data are  ignored
              and tiffgt does it's best to display as much of an image as possible.

       -w     Enable  reporting  of  warning  messages  from the TIFF library.  By default tiffgt
              ignores warning messages generated when reading an image.

       -v     Place information in the title bar describing what type of window  (full  color  or
              colormap) is being used, the name of the input file, and the directory index of the
              image (if non-zero).  By default, the window type is not shown in the title bar.

BUGS

       Images wider and taller than the display are silently  truncated  to  avoid  crashing  old
       versions of the window manager.

SEE ALSO

       tiffdump(1), tiffinfo(1), tiffcp(1), libtiff(3TIFF)

       Libtiff library home page: http://www.remotesensing.org/libtiff/