Unix/Linux Go Back    


CentOS 7.0 - man page for tiffcrop (centos section 1)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)


TIFFCROP(1)									      TIFFCROP(1)

NAME
       tiffcrop - select, copy, crop, convert, extract, and/or process one or more TIFF files.

SYNOPSIS
       tiffcrop [ options ] src1.tif ... srcN.tif dst.tif

DESCRIPTION
       Tiffcrop processes one or more files created according to the Tag Image File Format, Revi-
       sion 6.0, specification into one or more TIFF file(s).  Tiffcrop is  most  often  used  to
       extract	portions of an image for processing with bar code recognizer or OCR software when
       that software cannot restrict the region of interest to a specific portion of the image or
       to  improve  efficiency when the regions of interest must be rotated.  It can also be used
       to subdivide all or part of a processed image into smaller sections and export  individual
       images or sections of images as separate files or separate images within one or more files
       derived from the original input image or images.

       The available functions can be grouped broadly into three classes:

	      Those that select individual images or sections of images  from  the  input  files.
	      The  options  -N for sequences or lists of individual images in the input files, -Z
	      for zones, -z for regions, -X and -Y for fixed sized selections, -m for margins, -U
	      for  units, and -E for edge reference provide a variety of ways to specify portions
	      of the input image.

	      Those that allow the individual images or selections to be exported to one or  more
	      output files in different groupings and control the organization of the data in the
	      output images. The options -P for page size grouping, -S for subdivision into  col-
	      umns  and  rows  and -e for export mode options that produce one or more files from
	      each input image. The options -r, -s, -t, -w  control strip  and	tile  format  and
	      sizes  while  -B	-L  -c	-f  modify  the endian addressing scheme, the compression
	      options, and the bit fill sequence of images as they are written.

	      Those that perform some action on each image that is selected from the input  file.
	      The  options include -R for rotate, -I for inversion of the photometric interpreta-
	      tion and/or data values, and -F to flip (mirror) the image horizontally  or  verti-
	      cally.

       Functions  are  applied to the input image(s) in the following order: cropping, fixed area
       extraction, zone and region extraction, inversion, mirroring, rotation.

       Functions are applied to the output image(s) in the following order: export  mode  options
       for grouping zones, regions, or images into one or more files, or row and column divisions
       with output margins, or page size divisions with page orientation options.

       Finally, strip, tile, byte order, output resolution, and compression options  are  applied
       to all output images.

       The  output  file(s)  may be organized and compressed using a different algorithm from the
       input files.  By default, tiffcrop will copy all the understood tags in a  TIFF	directory
       of  an  input file to the associated directory in the output file.  Options can be used to
       force the resultant image to be written as strips or tiles of data, respectively.

       Tiffcrop can be used to reorganize the storage characteristics of data in a file,  and  to
       reorganize, extract, rotate, and otherwise process the image data as specified at the same
       time whereas tiffcp does not alter the image data within the file.

       Using the options for selecting individual input images	and  the  options  for	exporting
       images  and/or segments defined as zones or regions of each input image, tiffcrop can per-
       form the functions of tiffcp and tiffsplit in a single pass while applying multiple opera-
       tions to individual selections or images.

OPTIONS
       -h     Display the syntax summary for tiffcrop.

       -v     Report the current version and last modification date for tiffcrop.

       -N odd|even|#,#-#,#|last
	      Specify  one or more series or range(s) of images within each file to process.  The
	      words odd or even may be used to specify all odd or even numbered  images  counting
	      from one.  Note that internally, TIFF images are numbered from zero rather than one
	      but since this convention is not obvious to most users, tiffcrop used 1 to specifiy
	      the  first image in a multipage file.  The word last may be used in place of a num-
	      ber in the sequence to indicate the final image in the  file  without  knowing  how
	      many  images there are.  Ranges of images may be specified with a dash and multiple
	      sets can be indicated by joining	them  in  a  comma-separated  list.  eg.  use  -N
	      1,5-7,last to process the 1st, 5th through 7th, and final image in the file.

       -E top|bottom|left|right
	      Specify  the top, bottom, left, or right edge as the reference from which to calcu-
	      ate the width and length of crop regions or sequence of postions	for  zones.  When
	      used  with  the -e option for exporting zones or regions, the reference edge deter-
	      mines how composite images are arranged. Using -E left or right  causes  successive
	      zones  or  regions  to be merged horizontally whereas using -E top or bottom causes
	      successive zones or regions to be arranged vertically. This option has no effect on
	      export  layout  when  multiple zones or regions are not being exported to composite
	      images. Edges may be abbreviated to the first letter.

       -e combined|divided|image|multiple|separate
	      Specify the export mode for images and selections from  input  images.   The  final
	      filename	on  the command line is considered to be the destination file or filename
	      stem for automatically generated sequences of files. Modes may  be  abbreviated  to
	      the first letter.

	      combined	  All  images  and  selections are written to a single file with multiple
	      selections from one image combined into a single image (default)

	      divided	 All images and selections are written to a single file with each  selec-
	      tion from one image written to a new image

	      image	  Each	input  image is written to a new file (numeric filename sequence)
	      with multiple selections from the image combined into one image

	      multiple	 Each input image is written to a new file  (numeric  filename	sequence)
	      with each selection from the image written to a new image

	      separate	 Individual selections from each image are written to separate files

       -U in|cm|px
	      Specify  the  type of units to apply to dimensions for margins and crop regions for
	      input and output images. Inches or centimeters are converted to  pixels  using  the
	      resolution  unit specified in the TIFF file (which defaults to inches if not speci-
	      fied in the IFD).

       -m #,#,#,#
	      Specify margins to be removed from the input image. The order must  be  top,  left,
	      bottom,  right  with  only  commas separating the elements of the list. Margins are
	      scaled according to the current units and removed before any other extractions  are
	      computed..

       -X #   Set the horizontal (X-axis) dimension of a region to extract relative to the speci-
	      fied origin reference. If the origin is the top or bottom edge, the  X  axis  value
	      will be assumed to start at the left edge.

       -Y #   Set  the	vertical (Y-axis) dimension of a region to extract relative to the speci-
	      fied origin reference. If the origin is the left or right edge, the  Y  axis  value
	      will be assumed to start at the top.

       -Z #:#,#:#
	      Specify  zones of the image designated as position X of Y equal sized portions mea-
	      sured from the reference edge,  eg 1:3 would be first third of the  image  starting
	      from the reference edge minus any margins specified for the confining edges. Multi-
	      ple zones can be specified as a comma separated list but they  must  reference  the
	      same  edge.  To  extract the top quarter and the bottom third of an image you would
	      use -Z 1:4,3:3.

       -z x1,y1,x2,y2: ... :xN,yN,xN+1,yN+1
	      Specify a series of coordinates to define regions  for  processing  and  exporting.
	      The  coordinates	represent  the top left and lower right corners of each region in
	      the current units, eg inch, cm, or pixels. Pixels are counted from one to width  or
	      height and inches or cm are calculated from image resolution data.

	      Each  colon  delimited series of four values represents the horizontal and vertical
	      offsets from the top and left edges of the image, regardless of the edge	specified
	      with  the -E option. The first and third values represent the horizontal offsets of
	      the corner points from the left edge while the second and fourth	values	represent
	      the vertical offsets from the top edge.

       -F horiz|vert
	      Flip, ie mirror, the image or extracted region horizontally or vertically.

       -R 90|180|270
	      Rotate the image or extracted region 90, 180, or 270 degrees clockwise.

       -I [black|white|data|both]
	      Invert color space, eg dark to light for bilevel and grayscale images.  This can be
	      used to modify negative images to positive or to correct images that have the  PHO-
	      TOMETRIC_INTERPRETATIN  tag  set	incorrectly.  If the value is black or white, the
	      PHOTOMETRIC_INTERPRETATION tag is set to MinIsBlack or MinIsWhite, without altering
	      the  image  data. If the argument is data or both, the data values of the image are
	      modified. Specifying both inverts the data and the PHOTOMETRIC_INTERPRETATION  tag,
	      whereas using data inverts the data but not the PHOTOMETRIC_INTERPRETATION tag.  No
	      support for modifying the color space of color images in this release.

       -H #   Set the horizontal resolution of output images to # expressed in the current units.

       -V #   Set the vertical resolution of the output images to  #  expressed  in  the  current
	      units.

       -J #   Set  the	horizontal  margin  of	an output page size to # expressed in the current
	      units when sectioning image into columns x rows subimages using  the  -S	cols:rows
	      option.

       -K #   Set  the vertical margin of an output page size to # expressed in the current units
	      when sectioning image into columns x rows submiages using the -S cols:rows option.

       -O portrait|landscape|auto
	      Set the output orientation of the pages or sections.  Auto will use the arrangement
	      that requires the fewest pages.  This option is only meaningful in conjunction with
	      the -P option to format an image to fit on a specific paper size.

       -P page
	      Format the output images to fit on page size paper. Use -P list to  show	the  sup-
	      ported  page  sizes  and dimensions.  You can define a custom page size by entering
	      the width and length of the page in the current units  with  the	following  format
	      #.#x#.#.

       -S cols:rows
	      Divide each image into cols across and rows down equal sections.

       -B     Force  output  to  be  written with Big-Endian byte order.  This option only has an
	      effect when the output file is created or overwritten and not when it  is  appended
	      to.

       -C     Suppress	the  use  of  ``strip  chopping''  when reading images that have a single
	      strip/tile of uncompressed data.

       -c     Specify the compression to use for data written to the output  file:  none  for  no
	      compression, packbits for PackBits compression, lzw for Lempel-Ziv & Welch compres-
	      sion, jpeg for baseline JPEG compression.  zip  for  Deflate  compression,  g3  for
	      CCITT  Group  3  (T.4) compression, and g4 for CCITT Group 4 (T.6) compression.  By
	      default tiffcrop will compress data according to the value of the  Compression  tag
	      found in the source file.

	      The  CCITT Group 3 and Group 4 compression algorithms can only be used with bilevel
	      data.

	      Group 3 compression can be specified together with several T.4-specific options: 1d
	      for  1-dimensional  encoding, 2d for 2-dimensional encoding, and fill to force each
	      encoded scanline to be zero-filled so that the terminating EOL code lies on a  byte
	      boundary.   Group  3-specific  options are specified by appending a ``:''-separated
	      list to the ``g3''  option;  e.g.   -c  g3:2d:fill  to  get  2D-encoded  data  with
	      byte-aligned EOL codes.

	      LZW  compression	can  be  specified  together with a predictor value.  A predictor
	      value of 2 causes each scanline of the output image to undergo  horizontal  differ-
	      encing  before it is encoded; a value of 1 forces each scanline to be encoded with-
	      out differencing.  LZW-specific options are specified by	appending  a  ``:''-sepa-
	      rated  list to the ``lzw'' option; e.g.  -c lzw:2 for LZW compression with horizon-
	      tal differencing.

       -f     Specify the bit fill order to use in writing output  data.   By  default,  tiffcrop
	      will  create  a  new  file with the same fill order as the original.  Specifying -f
	      lsb2msb will force data to be written with the FillOrder tag set to LSB2MSB,  while
	      -f msb2lsb will force data to be written with the FillOrder tag set to MSB2LSB.

       -i     Ignore non-fatal read errors and continue processing of the input file.

       -l     Specify the length of a tile (in pixels).  Tiffcrop attempts to set the tile dimen-
	      sions so that no more than 8 kilobytes of data appear in a tile.

       -L     Force output to be written with Little-Endian byte order.  This option only has  an
	      effect  when  the output file is created or overwritten and not when it is appended
	      to.

       -M     Suppress the use of memory-mapped files when reading images.

       -p     Specify the planar configuration to use in writing image data that  has  more  than
	      one  sample  per	pixel.	By default, tiffcrop will create a new file with the same
	      planar configuration as the original.  Specifying -p contig will force data  to  be
	      written  with  multi-sample data packed together, while -p separate will force sam-
	      ples to be written in separate planes.

       -r     Specify the number of rows (scanlines) in each strip of data written to the  output
	      file.   By  default  (or	when  value 0 is specified), tiffcrop attempts to set the
	      rows/strip that no more than 8 kilobytes of data appear in a strip. If you  specify
	      the  special value -1 it will results in infinite number of the rows per strip. The
	      entire image will be the one strip in that case.

       -s     Force the output file to be written with data  organized	in  strips  (rather  than
	      tiles).

       -t     Force  the  output  file	to  be	written with data organized in tiles (rather than
	      strips).

       -w     Specify the width of a tile (in pixels).	tiffcrop attempts to set the tile  dimen-
	      sions so that no more than 8 kilobytes of data appear in a tile.	tiffcrop attempts
	      to set the tile dimensions so that no more than 8 kilobytes of  data  appear  in	a
	      tile.

       Debug and dump facility
	      -D  opt1:value1,opt2:value2,opt3:value3:opt4:value4 Display program progress and/or
	      dump raw data to non-TIFF files.	Options include the following and must be  joined
	      as  a  comma separated list. The use of this option is generally limited to program
	      debugging and development of future options. An equal sign may be  substituted  for
	      the colon in option:value pairs.

	      debug:N	      Display limited program progress indicators where larger N increase
	      the level of detail.

	      format:txt|raw  Format any logged data as ASCII text or raw  binary  values.  ASCII
	      text dumps include strings of ones and zeroes representing the binary values in the
	      image data plus identifying headers.

	      level:N	      Specify the level of detail presented in the dump files.	This  can
	      vary from dumps of the entire input or output image data to dumps of data processed
	      by specific functions. Current range of levels is 1 to 3.

	      input:full-path-to-directory/input-dumpname

	      output:full-path-to-directory/output-dumpname

	      When dump files are being written, each image will be written to	a  separate  file
	      with  the  name  built  by  adding  a numeric sequence value to the dumpname and an
	      extension of .txt for ASCII dumps or .bin for binary dumps.

	      The four debug/dump options are independent, though it makes little sense to  spec-
	      ify a dump file without specifying a detail level.

	      Note: Tiffcrop may be compiled with -DDEVELMODE to enable additional very
	       low level debug reporting.

EXAMPLES
       The following concatenates two files and writes the result using LZW encoding:
	      tiffcrop -c lzw a.tif b.tif result.tif

       To  convert  a G3 1d-encoded TIFF to a single strip of G4-encoded data the following might
       be used:
	      tiffcrop -c g4 -r 10000 g3.tif g4.tif
       (1000 is just a number that is larger than the number of rows in the source file.)

       To extract a selected set of images from  a  multi-image  TIFF  file  use  the  -N  option
       described  above.  Thus,  to  copy  the	1st  and  3rd images of image file "album.tif" to
       "result.tif":
	      tiffcrop -N 1,3 album.tif result.tif

       Invert a bilevel image scan of a microfilmed document and crop off margins of 0.25  inches
       on  the left and right, 0.5 inch on the top, and 0.75 inch on the bottom. From the remain-
       ing portion of the image, select the second and third quarters, ie, one half of	the  area
       left from the center to each margin.
	      tiffcrop	-U  in	-m  0.5,0.25,0.75,0.25	-E left -Z 2:4,3:4 -I both MicrofilmNega-
	      tive.tif MicrofilmPostiveCenter.tif

       Extract only the final image of a large Architectural E	sized  multipage  TIFF	file  and
       rotate  it  90  degrees	clockwise  while  reformatting the output to fit on tabloid sized
       sheets with one quarter of an inch on each side:
	      tiffcrop -N last -R 90 -O auto -P tabloid -U in -J 0.25  -K  0.25  -H  300  -V  300
	      Big-PlatMap.tif BigPlatMap-Tabloid.tif
       The output images will have a specified resolution of 300 dpi in both directions. The ori-
       entation of each page will be determined by whichever choice requires the fewest pages. To
       specify	a  specific  orientation,  use	the  portrait or landscape option. The paper size
       option does not resample the image. It breaks each original image into a series of smaller
       images that will fit on the target paper size at the specified resolution.

       Extract	two  regions  2048 pixels wide by 2048 pixels high from each page of a multi-page
       input file and write each region to a separate output file.
	      tiffcrop -U px -z 1,1,2048,2048:1,2049,2048,4097 -e separate  CheckScans.tiff Check
       The output file names will use the stem Check with a numeric suffix which  is  incremented
       for  each  region of each image, eg Check-001.tiff, Check-002.tiff ...  Check-NNN.tiff. To
       produce a unique file for each page of the input image with one new image for each  region
       of the input image on that page, change the export option to -e multiple.

NOTES
       In  general, bilevel, grayscale, palette and RGB(A) data with bit depths from 1 to 32 bits
       should work in both interleaved and separate plane formats. Unlike  tiffcp,  tiffcrop  can
       read  and  write  tiled	images	with bits per sample that are not a multiple of 8 in both
       interleaved and separate planar format. Floating point data types  are  supported  at  bit
       depts of 16, 24, 32 and 64 bits per sample.

       Not  all  images  can be converted from one compression scheme to another.  Data with some
       photometric interpretations and/or bit depths are tied to specific compression schemes and
       vice-versa,  e.g.  Group 3/4 compression is only usable for bilevel data. JPEG compression
       is only usable on 8 bit per sample data (or 12 bit if LibTIFF was  compiled  with  12  bit
       JPEG  support).	Support  for  OJPEG compressed images is problematic at best. Since OJPEG
       compression is no longer supported for writing images with LibTIFF, these images  will  be
       updated	to  the  newer JPEG compression when they are copied or processed. This may cause
       the image to appear color shifted or distorted after conversion.  In  some  cases,  it  is
       possible to remove the original compression from image data using the option -cnone.

       Tiffcrop  does  not  currently  provide	options to up or downsample data to different bit
       depths or convert data from one photometric interpretation to another, e.g.  16	bits  per
       sample to 8 bits per sample or RGB to grayscale.

       Tiffcrop  is  very  loosely  derived  from code in tiffcp with extensive modifications and
       additions to support the selection of input images and regions and the exporting  of  them
       to  one	or  more  output  files in various groupings. The image manipulation routines are
       entirely new and additional ones may be added in the future. It will handle  tiled  images
       with bit depths that are not a multiple of eight that tiffcp may refuse to read.

       Tiffcrop  was  designed	to  handle large files containing many moderate sized images with
       memory usage that is independent of the number of images in the file.  In order to support
       compression  modes  that  are  not  based on individual scanlines, e.g. JPEG, it now reads
       images by strip or tile rather than by indvidual scanlines.  In	addition  to  the  memory
       required  by  the  input and output buffers associated with LibTIFF one or more buffers at
       least as large as the largest image to be read are required. The design favors large  vol-
       ume  document  processing uses over scientific or graphical manipulation of large datasets
       as might be found in research or remote sensing scenarios.

SEE ALSO
       pal2rgb(1),   tiffinfo(1),    tiffcmp(1),    tiffcp(1),	  tiffmedian(1),    tiffsplit(1),
       libtiff(3TIFF)

       Libtiff library home page: http://www.remotesensing.org/libtiff/

libtiff 				  December, 2008			      TIFFCROP(1)
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums


All times are GMT -4. The time now is 09:49 AM.