TIFFGT(1)                                                            TIFFGT(1)



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/



libtiff                       September 20, 2005                     TIFFGT(1)
