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<meta content="groff -Thtml, see www.gnu.org" name="generator">
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<meta content="text/css" name="Content-Style">
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<title>TIFFGT</title>
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TIFFGT

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NAME
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SYNOPSIS
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DESCRIPTION
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OPTIONS
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BUGS
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SEE ALSO
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NAME

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       cols="2" cellspacing="0" cellpadding="0">
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tiffgt − display an image stored in a

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<small>TIFF</small> file (Silicon Graphics version)

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SYNOPSIS

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       cols="2" cellspacing="0" cellpadding="0">
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tiffgt [ options ] input.tif ...

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DESCRIPTION

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       cols="2" cellspacing="0" cellpadding="0">
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tiffgt displays one or more images stored using

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

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tiffgt correctly handles files with any of the

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following characteristics:

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       cols="3" cellspacing="0" cellpadding="0">
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BitsPerSample

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1, 2, 4, 8, 16

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SamplesPerPixel

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1, 3, 4 (the 4th sample is ignored)

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PhotometricInterpretation

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0 (min-is-white), 1 (min-is-black), 2 (RGB), 3

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(palette), 6 (YCbCr)

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PlanarConfiguration

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1 (contiguous), 2 (separate)

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Orientation

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1 (top-left), 4 (bottom-left)

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       cols="2" cellspacing="0" cellpadding="0">
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Data may be organized as strips or tiles and may be

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compressed with any of the compression algorithms supported
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by the libtiff(3) library.

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For palette images (PhotometricInterpretation=3),

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

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tiffgt can be used to display multiple images

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

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       cols="4" cellspacing="0" cellpadding="0">
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b

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Use a PhotometricInterpretation of MinIsBlack in

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displaying the current image.

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l

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Use a FillOrder of lsb-to-msb in decoding the

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current image.

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m

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Use a FillOrder of msb-to-lsb in decoding the

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current image.

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c

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Use a colormap visual to display the current image.

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r

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Use a true color (24-bit RGB) visual to display the

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current image.

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w

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Use a PhotometricInterpretation of MinIsWhite in

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displaying the current image.

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W

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Toggle (enable/disable) display of warning messages from

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the <small>TIFF</small> library when decoding images.

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E

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Toggle (enable/disable) display of error messages from

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the <small>TIFF</small> library when decoding images.

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z

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Reset all parameters to their default settings

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(FillOrder, PhotometricInterpretation,
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handling of warnings and errors).

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PageUp

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Display the previous image in the current file or the

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last image in the previous file.

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       cols="2" cellspacing="0" cellpadding="0">
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PageDown

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       cols="2" cellspacing="0" cellpadding="0">
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Display the next image in the current file or the first

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image in the next file.

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       cols="5" cellspacing="0" cellpadding="0">
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Home

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Display the first image in the current file.

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End

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Display the last image in the current file

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(unimplemented).

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OPTIONS

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       cols="5" cellspacing="0" cellpadding="0">
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−c

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Force image display in a colormap window.

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−d

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Specify an image to display by directory number. By

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default the first image in the file is displayed.
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Directories are numbered starting at zero.

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−e

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Enable reporting of error messages from the

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<small>TIFF</small> library. By default tiffgt
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silently ignores images that cannot be read.

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−f

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Force tiffgt to run as a foreground process. By

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default tiffgt will place itself in the background
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once it has opened the requested image file.

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−l

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Force the presumed bit ordering to be <small>LSB</small>

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to <small>MSB.</small>

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−m

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Force the presumed bit ordering to be <small>MSB</small>

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to <small>LSB.</small>

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−o

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Specify an image to display by directory offset. By

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default the first image in the file is displayed.
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Directories offsets may be specified using C-style syntax;
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i.e. a leading ‘‘0x’’ for
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hexadecimal and a leading ‘‘0’’ for
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octal.

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−p

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Override the value of the

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

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−r

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Force image display in a full color window.

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−s

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Stop on the first read error. By default all errors in

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the input data are ignored and tiffgt does it’s
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best to display as much of an image as possible.

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−w

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Enable reporting of warning messages from the

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<small>TIFF</small> library. By default tiffgt
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ignores warning messages generated when reading an
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image.

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−v

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Place information in the title bar describing what type

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

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BUGS

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       cols="2" cellspacing="0" cellpadding="0">
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Images wider and taller than the display are silently

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truncated to avoid crashing old versions of the window
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manager.

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SEE ALSO

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       cols="2" cellspacing="0" cellpadding="0">
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tiffdump(1), tiffinfo(1), tiffcp(1),

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libtiff(3TIFF)

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Libtiff library home page:

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http://www.remotesensing.org/libtiff/

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