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man/tiffcrop.1
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.\" $Id: tiffcrop.1,v 1.1 2007-02-24 14:50:13 dron Exp $
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.\" tiffcrop -- a port of tiffcp extended to include cropping of selections
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.\"
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.\" Copyright (c) 1988-1997 Sam Leffler
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.\" Copyright (c) 1991-1997 Silicon Graphics, Inc.
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.\"
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.\" Permission to use, copy, modify, distribute, and sell this software and
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.\" its documentation for any purpose is hereby granted without fee, provided
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.\" that (i) the above copyright notices and this permission notice appear in
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.\" all copies of the software and related documentation, and (ii) the names of
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.\" Sam Leffler and Silicon Graphics may not be used in any advertising or
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.\" publicity relating to the software without the specific, prior written
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.\" permission of Sam Leffler and Silicon Graphics.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
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.\" EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
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.\" WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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.\"
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.\" IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
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.\" ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
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.\" OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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.\" WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
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.\" LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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.\" OF THIS SOFTWARE.
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.\"
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.\" Richard Nolde 11/2006 Add support for the options below to extract
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.\" sections of image(s) and to modify the whole image or selected portion
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.\" with rotations, mirroring, and colorscale/colormap inversion of selected
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.\" types of TIFF images when appropriate
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.\"
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.\" Options:
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.\" -U units [in, cm, px ] inches, centimeters or pixels
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.\" -X # horizontal dimension of region to extract expressed in current units
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.\" -Y # vertical dimension of region to extract expressed in current units
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.\" -E t|l|r|b edge to use as origin
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.\" -M #,#,#,# margins from edges for selection: top, left, bottom, right (commas separated)
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.\" -Z #:#,#:# up to six zones of the image designated as zone X of Y,
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.\" e.g. 1:3 would be first of three equal portions measured from reference edge
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.\" -N odd|even|#,#-#,#|last sequences and ranges of images within file to process
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.\" the words odd or even may be used to specify all odd or even numbered images
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.\" the word last may be used in place of a number in the sequence to indicate
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.\" the final image in the file without knowing how many images there are
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.\" -R # rotate image or crop selection by 90,180,or 270 degrees clockwise
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.\" -F h|v flip (mirror) image or crop selection horizontally or vertically
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.\" -I invert the colormap, black to white, for bi-level and grayscale images
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.\"
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.if n .po 0
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.TH TIFFCROP 1 "February 24, 2007" "libtiff"
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.SH NAME
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tiffcrop \- copy (and possibly convert and crop or process) a
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.SM TIFF
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file
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.SH SYNOPSIS
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.B tiffcrop
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[
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.I options
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]
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.I "src1.tif ... srcN.tif dst.tif"
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.SH DESCRIPTION
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.I tiffcrop
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combines one or more files created according to the Tag Image File Format,
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Revision 6.0 into a single
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.SM TIFF
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file. The output file may be compressed using a different algorithm than the
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input files.
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.I tiffcrop
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is most often used to extract portions of an image for processing with bar
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code recognizer or OCR software when that software cannot restrict the region
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of interest to a specific portion of the image or to improve efficiency when
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the regions of interest must be rotated.
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.PP
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By default,
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.I tiffcrop
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will copy all the understood tags in a
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.SM TIFF
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directory of an input file to the associated directory in the output file.
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.PP
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.I tiffcrop
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can be used to reorganize the storage characteristics of data in a file, and
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it will alter or convert the image data content as specified at the same time,
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unlike tiffcp.
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.PP
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.I tiffcrop
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will behave exactly like tiffcp if none of the new options are specified.
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.SH OPTIONS
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.TP
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.B \-N odd|even|#,#-#,#|last
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sequences and ranges of images within file to process. The words
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.B odd
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or
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.B even
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may be used to specify all odd or even numbered images. The word
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.B last
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may be used in place of a number in the sequence to indicate the final image
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in the file without knowing how many images there are. Ranges of images may be
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specified with a dash and multiple sets can be indicated by joining them in a
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comma-separated list. e.g.. use
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.B \-N 1,5-7,last
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to process the 1st, 5th through 7th, and final image in the file.
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.TP
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.B \-E top|bottom|left|right
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use the top, bottom, left, or right edge as origin reference for width and
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length of crop regions. May be abbreviated to first letter.
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.TP
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.B \-U in|cm|px
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units to apply to dimensions for margins and crop regions. Inches or
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centimeters are converted to pixels using the resolution unit specified in the
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TIFF file (which defaults to inches if not specified in the IFD).
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.TP
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.B \-m #,#,#,#
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margins to be removed from the image. The order must be top, left, bottom,
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right with only commas separating the elements of the list. Margins are scaled
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according to the current units and removed before any other extractions are
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computed. Capital M was in use.
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.TP
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.B \-X #
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horizontal (X-axis) dimension of a region to extract relative to the specified
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origin reference. If the origin is the top or bottom edge, the X axis value
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will be assumed to start at the left edge.
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.TP
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.B \-Y #
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vertical (Y-axis) dimension of a region to extract relative to the specified
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origin reference. If the origin is the left or right edge, the Y axis value
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will be assumed to start at the top.
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.TP
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.B \-Z #:#,#:#
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zones of the image designated as position X of Y equal sized portions measured
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from the reference edge, e.g. 1:3 would be first third of the image starting
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from the reference edge minus any margins specified for the confining edges.
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Multiple zones can be specified as a comma separated list but they must
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reference the same edge. To extract the top quarter and the bottom third of an
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image you would use
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.B \-Z 1:4,3:3.
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.TP
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.B \-F horiz|vert
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flip, i.e. mirror, the image or extracted region horizontally or vertically.
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.TP
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.B \-R 90|180|270
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rotate the image or extracted region 90, 180, or 270 degrees clockwise.
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.TP
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.B \-I
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invert the colorspace values for grayscale and bi-level images. This
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would be used to correct negative images that have incorrect PHOTOMETRIC
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INTERPRETATION tags. No support for color images.
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.TP
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.BI \-b " image"
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subtract the following monochrome image from all others processed. This can
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be used to remove a noise bias from a set of images. This bias image is
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typically an image of noise the camera saw with its shutter closed. Bias image
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support is not available with options for cropping, rotating, or inverting the
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image.
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.TP
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.B \-B
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Force output to be written with Big-Endian byte order. This option only has an
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effect when the output file is created or overwritten and not when it is
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appended to.
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.TP
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.B \-C
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Suppress the use of ``strip chopping'' when reading images that have a single
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strip/tile of uncompressed data.
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.TP
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.B \-c
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Specify the compression to use for data written to the output file:
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.B none
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for no compression,
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.B packbits
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for PackBits compression,
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.B lzw
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for Lempel-Ziv & Welch compression,
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.B jpeg
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for baseline JPEG compression,
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.B zip
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for Deflate compression,
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.B g3
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for CCITT Group 3 (T.4) compression,
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and
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.B g4
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for CCITT Group 4 (T.6) compression.
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By default
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.I tiffcrop
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will compress data according to the value of the
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.I Compression
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tag found in the source file.
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.IP
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The
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.SM CCITT
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Group 3 and Group 4 compression algorithms can only
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be used with bi-level data.
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.IP
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Group 3 compression can be specified together with several
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T.4-specific options:
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.B 1d
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for 1-dimensional encoding,
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.B 2d
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for 2-dimensional encoding,
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and
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.B fill
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to force each encoded scanline to be zero-filled so that the
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terminating EOL code lies on a byte boundary.
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Group 3-specific options are specified by appending a ``:''-separated
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list to the ``g3'' option; e.g.
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.B "\-c g3:2d:fill"
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to get 2D-encoded data with byte-aligned EOL codes.
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.IP
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.SM LZW
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compression can be specified together with a
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.I predictor
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value.
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A predictor value of 2 causes
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each scanline of the output image to undergo horizontal
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differencing before it is encoded; a value
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of 1 forces each scanline to be encoded without differencing.
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LZW-specific options are specified by appending a ``:''-separated
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list to the ``lzw'' option; e.g.
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.B "\-c lzw:2"
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for
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.SM LZW
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compression with horizontal differencing.
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.TP
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.B \-f
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Specify the bit fill order to use in writing output data.
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By default,
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.I tiffcrop
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will create a new file with the same fill order as the original.
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Specifying
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.B "\-f lsb2msb"
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will force data to be written with the FillOrder tag set to
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.SM LSB2MSB,
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while
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.B "\-f msb2lsb"
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will force data to be written with the FillOrder tag set to
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.SM MSB2LSB.
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.TP
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.B \-i
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Ignore non-fatal read errors and continue processing of the input file.
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.TP
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.B \-l
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Specify the length of a tile (in pixels).
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.I tiffcrop
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attempts to set the tile dimensions so
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that no more than 8 kilobytes of data appear in a tile.
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.TP
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.B \-L
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Force output to be written with Little-Endian byte order.
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This option only has an effect when the output file is created or
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overwritten and not when it is appended to.
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.TP
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.B \-M
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Suppress the use of memory-mapped files when reading images.
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.TP
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.B \-p
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Specify the planar configuration to use in writing image data
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that has one 8-bit sample per pixel.
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By default,
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.I tiffcrop
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will create a new file with the same planar configuration as
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the original.
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Specifying
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.B "\-p contig"
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will force data to be written with multi-sample data packed
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together, while
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.B "\-p separate"
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will force samples to be written in separate planes.
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.TP
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.B \-r
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Specify the number of rows (scanlines) in each strip of data
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written to the output file.
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By default (or when value
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.B 0
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is specified),
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.I tiffcrop
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attempts to set the rows/strip
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that no more than 8 kilobytes of data appear in a strip. If you specify
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special value
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.B -1
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it will results in infinite number of the rows per strip. The entire image
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will be the one strip in that case.
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.TP
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.B \-s
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Force the output file to be written with data organized in strips
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(rather than tiles).
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.TP
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.B \-t
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Force the output file to be written with data organized in tiles
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(rather than strips).
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options can be used to force the resultant image to be written
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as strips or tiles of data, respectively.
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.TP
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.B \-w
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Specify the width of a tile (in pixels).
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.I tiffcrop
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attempts to set the tile dimensions so
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that no more than 8 kilobytes of data appear in a tile.
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.I tiffcrop
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attempts to set the tile dimensions so
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that no more than 8 kilobytes of data appear in a tile.
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.TP
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.B \-,={character}
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substitute {character} for ',' in parsing image directory indices
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in files. This is necessary if filenames contain commas.
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Note that ',=' with whitespace immediately following will disable
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the special meaning of the ',' entirely. See examples.
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.SH EXAMPLES
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The following concatenates two files and writes the result using
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.SM LZW
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encoding:
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.RS
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.nf
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tiffcrop -c lzw a.tif b.tif result.tif
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.fi
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.RE
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.PP
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To convert a G3 1d-encoded
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.SM TIFF
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to a single strip of G4-encoded data the following might be used:
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.RS
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.nf
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tiffcrop -c g4 -r 10000 g3.tif g4.tif
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.fi
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.RE
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(1000 is just a number that is larger than the number of rows in
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the source file.)
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To extract a selected set of images from a multi-image TIFF file
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use the -N option described above. Thus, to copy the 1st and 3rd
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images of image file "album.tif" to "result.tif":
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.RS
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.nf
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tiffcrop -N 1,3 album.tif result.tif
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.fi
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.RE
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Given file "CCD.tif" whose first image is a noise bias
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followed by images which include that bias,
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subtract the noise from all those images following it
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(while decompressing) with the command:
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.RS
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.nf
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tiffcrop -c none -b CCD.tif CCD.tif -d 2 result.tif
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.fi
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.RE
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.SH "SEE ALSO"
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.BR pal2rgb (1),
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.BR tiffinfo (1),
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.BR tiffcmp (1),
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.BR tiffcp (1),
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.BR tiffmedian (1),
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.BR tiffsplit (1),
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.BR libtiff (3TIFF)
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.PP
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Libtiff library home page:
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.BR http://www.remotesensing.org/libtiff/
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3367
tools/tiffcrop.c
Normal file
3367
tools/tiffcrop.c
Normal file
File diff suppressed because it is too large
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Reference in New Issue
Block a user