DMTXREAD(1)                                                        DMTXREAD(1)

       dmtxread - scan Data Matrix barcodes

       dmtxread [options] [FILE]...

       dmtxread  searches the named input FILEs (or standard input if no files
       are named or the filename "-" is given) for  ECC200  Data  Matrix  bar-
       codes,  reads  their contents, and writes the decoded messages to stan-
       dard output.

       -c, --codewords
              Only print the codewords extracted from a Data Matrix,  and  not
              the actual decoded message.

       -e, --minimum-edge=N
              Pixel length of smallest expected edge in image.

       -E, --maximum-edge=N
              Pixel length of largest expected edge in image.

       -g, --gap=N
              Use scan grid with gap of N pixels (or less) between lines.

       -l, --list-formats
              List the supported input image formats.

       -m, --milliseconds=N
              Stop scan after N milliseconds (per image).

       -n, --newline
              Print a newline character at the end of decoded data.

       -p, --page=N
              Only scan Nth page of images.

       -q, --square-deviation=N
              Maximum  deviation  (degrees)  from  squareness between adjacent
              barcode sides. Default value is N=40, but  N=10  is  recommended
              for  flat  applications  like faxes and other scanned documents.
              Barcode regions found with corners <(90-N) or  >(90+N)  will  be
              ignored by the decoder.

       -r, --resolution=N
              Decoding resolution in dots per inch (DPI). Only used for vecto-
              rial input images such as SVG, PDF, etc... This option accepts a
              single  argument  (eg:  300)  as well as horizontal and vertical
              resolutions (eg: 300x150). The default resolution is 72dpi.

       -s, --symbol-size=[asr|RxC]
              Only consider barcodes of specific size or shape.
                 a = All sizes     [default]
                 s = Only squares
                 r = Only rectangles
               RxC = Exactly this many rows and columns (10x10, 8x18,  etc...)

       -t, --threshold=N
              Set  the  minimum edge threshold as a percentage of maximum. For
              example, an edge between a pure white and pure black pixel would
              have  an  intensity  of  100.  Edges  with intensities below the
              indicated threshold will be ignored  by  the  decoding  process.
              Lowering  the  threshold  will increase the amount of work to be
              done, but may be necessary for low contrast or blurry images.

       -x, --x-range-min=N[%]
              Do not scan pixels to the left of pixel column N (or N%).

       -X, --x-range-max=N[%]
              Do not scan pixels to the right of pixel column N (or N%).

       -y, --y-range-min=N[%]
              Do not scan pixels above pixel row N (or N%).

       -Y, --y-range-max=N[%]
              Do not scan pixels below pixel row N (or N%).

       -C, --corrections-max=N
              Correct at most N errors per image (0 = correction disabled).

       -D, --diagnose
              Make copy of image with additional diagnostic data.

       -M, --mosaic (experimental)
              Interpret detected regions as Data Mosaic barcodes.

       -N, --stop-after=N
              Stop scanning after Nth barcode is returned.

       -P, --page-numbers
              Print each decoded message with its fax/tiff page number.

       -R, --corners
              Prefix the decoded message with the barcode's corner  locations.

       -S, --shrink=N
              Internally  shrink  image  by  factor  of N. Shrinking is accom-
              plished by skipping N-1 pixels at a time, often  producing  sig-
              nificantly faster scan times. It also improves scan success rate
              for images taken with poor camera focus provided  the  image  is
              sufficiently large.

       -U, --unicode
              Print Extended ASCII characters in UTF-8 Unicode.

       -v, --verbose
              Use verbose messages.

       -V, --version
              Print program version information.

       --help Display this help message and quit.

       ISO/IEC 16022:2000

       ANSI/AIM BC11 ISS

       Exit status has following possible meanings:
          0  At least one barcode was found and decoded
          1  No barcodes were found
         >1  Error occurred that prevented command from executing normally

       Email bug reports to

       Copyright (C) 2008, 2009 Mike Laughton

                               September 4, 2009                   DMTXREAD(1)