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tiffgt.1.gz

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 com‐
       pressed 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 com‐
       mand 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  dis‐
              playing 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  dis‐
              playing 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 (Fil‐
              lOrder, PhotometricInterpretation, handling  of  warn‐
              ings 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 (unimple‐
              mented).

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, minis‐
              black,  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 trun‐
       cated 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.remotesens‐
       ing.org/libtiff/



libtiff                  September 20, 2005                TIFFGT(1)
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