xenial (1) tiffgt.1.gz

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/