TIFFGT(1) LibTIFF TIFFGT(1)
NAME
tiffgt - display an image stored in a TIFF file (Silicon Graphics ver-
sion)
SYNOPSIS
tiffgt [ options ] input.tif …
DESCRIPTION
tiffgt displays one or more images stored using the Tag Image File For-
mat, Revision 6.0.
tiffgt correctly handles files with any of the following characteris-
tics:
SUPPORTED TAG VALUES
┌──────────────────────────┬────────────────────────────┐
│Tag │ Value │
├──────────────────────────┼────────────────────────────┤
│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 (sepa- │
│ │ rate) │
├──────────────────────────┼────────────────────────────┤
│Orientation │ 1 (top-left), 4 (bot- │
│ │ tom-left) │
└──────────────────────────┴────────────────────────────┘
Data may be organized as strips or tiles and may be compressed with any
of the compression algorithms supported by the libtiff 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 speci-
fied on the command line to be displayed. In addition the following
keyboard commands are recognized:
ACTION KEYS
┌─────────┬────────────────────────────┐
│Key │ Description │
├─────────┼────────────────────────────┤
│b │ Use a PhotometricInterpre- │
│ │ tation of MinIsBlack in │
│ │ displaying the current im- │
│ │ age │
└─────────┴────────────────────────────┘
│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 PhotometricInterpre- │
│ │ tation of MinIsWhite in │
│ │ displaying the current im- │
│ │ age │
├─────────┼────────────────────────────┤
│W │ Toggle (enable/disable) │
│ │ display of warning mes- │
│ │ sages from the TIFF li- │
│ │ brary 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, PhotometricIn- │
│ │ terpretation, 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 (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 re-
quested 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 hexa-
decimal and a leading 0 for octal.
-p Override the value of the PhotometricInterpretation tag; the pa-
rameter 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 in-
put 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 win-
dow (full color or colormap) is being used, the name of the in-
put 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)
AUTHOR
LibTIFF contributors
COPYRIGHT
1988-2023, LibTIFF contributors
4.5 Nov 23, 2023 TIFFGT(1)
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