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<html>
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<head>
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<meta name="generator" content="groff -Thtml, see www.gnu.org">
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<meta name="Content-Style" content="text/css">
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<title>TIFFCROP</title>
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</head>
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<body>
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TIFFCROP
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NAME
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SYNOPSIS
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DESCRIPTION
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OPTIONS
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EXAMPLES
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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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tiffcrop − copy (and possibly convert and crop or
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process) a <small>TIFF</small> file
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SYNOPSIS
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       cols="2" cellspacing="0" cellpadding="0">
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tiffcrop [ options ] src1.tif ...
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srcN.tif dst.tif
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DESCRIPTION
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       cols="2" cellspacing="0" cellpadding="0">
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tiffcrop combines one or more files created
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according to the Tag Image File Format, Revision 6.0 into a
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single <small>TIFF</small> file. The output file may be
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compressed using a different algorithm than the input files.
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tiffcrop is most often used to extract portions of an
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image for processing with bar code recognizer or OCR
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software when that software cannot restrict the region of
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interest to a specific portion of the image or to improve
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efficiency when the regions of interest must be rotated.
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By default, tiffcrop will copy all the understood
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tags in a <small>TIFF</small> directory of an input file to
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the associated directory in the output file.
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tiffcrop can be used to reorganize the storage
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characteristics of data in a file, and it will alter or
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convert the image data content as specified at the same
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time, unlike tiffcp.
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tiffcrop will behave exactly like tiffcp if none
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of the new options are specified.
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OPTIONS
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       cols="2" cellspacing="0" cellpadding="0">
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−N odd|even|#,#-#,#|last
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sequences and ranges of images within file to process.
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The words odd or even may be used to specify
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all odd or even numbered images. The word last may be
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used in place of a number in the sequence to indicate the
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final image in the file without knowing how many images
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there are. Ranges of images may be specified with a dash and
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multiple sets can be indicated by joining them in a
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comma-separated list. e.g.. use −N 1,5-7,last
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to process the 1st, 5th through 7th, and final image in the
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file.
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       cols="2" cellspacing="0" cellpadding="0">
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−E top|bottom|left|right
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use the top, bottom, left, or right edge as origin
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reference for width and length of crop regions. May be
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abbreviated to first letter.
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       cols="2" cellspacing="0" cellpadding="0">
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−U in|cm|px
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units to apply to dimensions for margins and crop
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regions. Inches or centimeters are converted to pixels using
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the resolution unit specified in the TIFF file (which
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defaults to inches if not specified in the IFD).
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−m #,#,#,#
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margins to be removed from the image. The order must be
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top, left, bottom, right with only commas separating the
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elements of the list. Margins are scaled according to the
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current units and removed before any other extractions are
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computed. Capital M was in use.
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       cols="5" cellspacing="0" cellpadding="0">
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−X #
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horizontal (X-axis) dimension of a region to extract
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relative to the specified origin reference. If the origin is
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the top or bottom edge, the X axis value will be assumed to
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start at the left edge.
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−Y #
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vertical (Y-axis) dimension of a region to extract
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relative to the specified origin reference. If the origin is
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the left or right edge, the Y axis value will be assumed to
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start at the top.
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       cols="2" cellspacing="0" cellpadding="0">
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−Z #:#,#:#
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zones of the image designated as position X of Y equal
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sized portions measured from the reference edge, e.g. 1:3
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would be first third of the image starting from the
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reference edge minus any margins specified for the confining
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edges. Multiple zones can be specified as a comma separated
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list but they must reference the same edge. To extract the
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top quarter and the bottom third of an image you would use
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−Z 1:4,3:3.
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−F horiz|vert
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flip, i.e. mirror, the image or extracted region
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horizontally or vertically.
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       cols="2" cellspacing="0" cellpadding="0">
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−R 90|180|270
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       cols="2" cellspacing="0" cellpadding="0">
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rotate the image or extracted region 90, 180, or 270
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degrees clockwise.
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       cols="5" cellspacing="0" cellpadding="0">
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−I
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invert the colorspace values for grayscale and bi-level
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images. This would be used to correct negative images that
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have incorrect PHOTOMETRIC INTERPRETATION tags. No support
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for color images.
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−b image
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subtract the following monochrome image from all others
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processed. This can be used to remove a noise bias from a
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set of images. This bias image is typically an image of
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noise the camera saw with its shutter closed. Bias image
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support is not available with options for cropping,
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rotating, or inverting the image.
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−B
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Force output to be written with Big-Endian byte order.
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This option only has an effect when the output file is
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created or overwritten and not when it is appended to.
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−C
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Suppress the use of ‘‘strip
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chopping’’ when reading images that have a
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single strip/tile of uncompressed data.
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−c
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Specify the compression to use for data written to the
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output file: none for no compression, packbits
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for PackBits compression, lzw for Lempel-Ziv &
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Welch compression, jpeg for baseline JPEG
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compression, zip for Deflate compression, g3
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for CCITT Group 3 (T.4) compression, and g4 for CCITT
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Group 4 (T.6) compression. By default tiffcrop will
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compress data according to the value of the
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Compression tag found in the source file.
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       cols="2" cellspacing="0" cellpadding="0">
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The <small>CCITT</small> Group 3 and Group 4 compression
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algorithms can only be used with bi-level data.
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Group 3 compression can be specified together with
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several T.4-specific options: 1d for 1-dimensional
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encoding, 2d for 2-dimensional encoding, and
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fill to force each encoded scanline to be zero-filled
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so that the terminating EOL code lies on a byte boundary.
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Group 3-specific options are specified by appending a
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‘‘:’’-separated list to the
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‘‘g3’’ option; e.g. −c
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g3:2d:fill to get 2D-encoded data with byte-aligned EOL
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codes.
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<small>LZW</small> compression can be specified together
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with a predictor value. 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 of 1 forces each
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scanline to be encoded without differencing. LZW-specific
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options are specified by appending a
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‘‘:’’-separated list to the
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‘‘lzw’’ option; e.g. −c
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lzw:2 for <small>LZW</small> compression with horizontal
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differencing.
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       cols="5" cellspacing="0" cellpadding="0">
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−f
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Specify the bit fill order to use in writing output
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data. By default, tiffcrop will create a new file
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with the same fill order as the original. Specifying
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−f lsb2msb will force data to be written with
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the FillOrder tag set to <small>LSB2MSB,</small> while
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−f msb2lsb will force data to be written with
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the FillOrder tag set to <small>MSB2LSB.</small>
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−i
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Ignore non-fatal read errors and continue processing of
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the input file.
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−l
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Specify the length of a tile (in pixels).
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tiffcrop attempts to set the tile dimensions so that
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no more than 8 kilobytes of data appear in a tile.
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−L
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Force output to be written with Little-Endian byte
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order. This option only has an effect when the output file
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is created or overwritten and not when it is appended
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to.
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−M
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Suppress the use of memory-mapped files when reading
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images.
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−p
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Specify the planar configuration to use in writing image
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data that has one 8-bit sample per pixel. By default,
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tiffcrop will create a new file with the same planar
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configuration as the original. Specifying −p
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contig will force data to be written with multi-sample
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data packed together, while −p separate will
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force samples to be written in separate planes.
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−r
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Specify the number of rows (scanlines) in each strip of
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data written to the output file. By default (or when value
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0 is specified), tiffcrop attempts to set the
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rows/strip that no more than 8 kilobytes of data appear in a
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strip. If you specify special value -1 it will
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results in infinite number of the rows per strip. The entire
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image will be the one strip in that case.
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−s
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Force the output file to be written with data organized
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in strips (rather than tiles).
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−t
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Force the output file to be written with data organized
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in tiles (rather than strips). options can be used to force
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the resultant image to be written as strips or tiles of
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data, respectively.
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−w
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Specify the width of a tile (in pixels). tiffcrop
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attempts to set the tile dimensions so that no more than 8
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kilobytes of data appear in a tile. tiffcrop attempts
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to set the tile dimensions so that no more than 8 kilobytes
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of data appear in a tile.
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       cols="2" cellspacing="0" cellpadding="0">
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−,={character}
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       cols="2" cellspacing="0" cellpadding="0">
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substitute {character} for ’,’ in parsing
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image directory indices in files. This is necessary if
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filenames contain commas. Note that ’,=’ with
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whitespace immediately following will disable the special
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meaning of the ’,’ entirely. See examples.
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EXAMPLES
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       cols="2" cellspacing="0" cellpadding="0">
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The following concatenates two files and writes the
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result using <small>LZW</small> encoding:
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       cols="2" cellspacing="0" cellpadding="0">
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tiffcrop -c lzw a.tif b.tif result.tif
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       cols="2" cellspacing="0" cellpadding="0">
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To convert a G3 1d-encoded <small>TIFF</small> to a
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single strip of G4-encoded data the following might be
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used:
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       cols="2" cellspacing="0" cellpadding="0">
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tiffcrop -c g4 -r 10000 g3.tif g4.tif
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       cols="2" cellspacing="0" cellpadding="0">
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(1000 is just a number that is larger than the number of
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rows in the source file.)
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To extract a selected set of images from a multi-image
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TIFF file use the -N option described above. Thus, to copy
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the 1st and 3rd images of image file "album.tif"
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to "result.tif":
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       cols="2" cellspacing="0" cellpadding="0">
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tiffcrop -N 1,3 album.tif result.tif
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       cols="2" cellspacing="0" cellpadding="0">
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Given file "CCD.tif" whose first image is a
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noise bias followed by images which include that bias,
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subtract the noise from all those images following it (while
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decompressing) with the command:
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       cols="2" cellspacing="0" cellpadding="0">
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tiffcrop -c none -b CCD.tif CCD.tif -d 2 result.tif
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SEE ALSO
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       cols="2" cellspacing="0" cellpadding="0">
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pal2rgb(1), tiffinfo(1), tiffcmp(1),
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tiffcp(1), tiffmedian(1), tiffsplit(1),
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libtiff(3TIFF)
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Libtiff library home page:
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http://www.simplesystems.org/libtiff/
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