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qrencode(1) [debian man page]

QRENCODE(1)						      General Commands Manual						       QRENCODE(1)

NAME

       qrencode - Encode input data in a QR Code and save as a PNG or EPS image.

SYNOPSIS

       qrencode [OPTION]...  [STRING]

DESCRIPTION

       Libqrencode  is	a  library  for encoding data in a QR Code symbol, a kind of 2D symbology that can be scanned by handy terminals such as a
       mobile phone with CCD. The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness.

       Qrencode is a utility software using libqrencode to encode string data in a QR Code and save as a PNG or EPS image.

OPTIONS

       -h, --help
	      display help message.

       -o FILENAME, --output=FILENAME
	      write image to FILENAME. If '-' is specified, the result will be output to standard output. If -S is given, structured  symbols  are
	      written to FILENAME-01.png, FILENAME-02.png, ... (suffix is removed from FILENAME, if specified)

       -s NUMBER, --size=NUMBER
	      specify the size of dot (pixel). (default=3)

       -l {LMQH}, --level={LMQH}
	      specify error collectin level from L (lowest) to H (highest). (default=L)

       -v NUMBER, --symversion=NUMBER
	      specify the version of the symbol. (default=auto)

       -m NUMBER, --margin=NUMBER
	      specify the width of margin. (default=4)

       -d NUMBER, --dpi=NUMBER
	      specify the DPI of the generated PNG. (default=72)

       -t {PNG,EPS,ANSI,ANSI256}, --type={PNG,EPS,ANSI,ANSI256}
	      specify the type of the generated image. (default=PNG)

       -S, --structured
	      make structured symbols. Version must be specified.

       -k, --kanji
	      assume that the input text contains kanji (shift-jis).

       -c, --casesensitive
	      encode lower-case alphabet characters in 8-bit mode. (default)

       -i, --ignorecase
	      ignore case distinctions and use only upper-case characters.

       -8, --8bit
	      encode entire data in 8-bit mode. -k, -c and -i will be ignored.

       -M, --micro
	      encode in a Micro QR Code. (experimental)

       -V, --version
	      display the version number and copyrights of the qrencode.

       [STRING]
	      input data. If it is not specified, data will be taken from standard input.

EXAMPLES

       qrencode -l L -v 1 -o output.png 'Hello, world!'
	      encode into a symbol version 1, level L.

       qrencode -iSv 1 --output=output.png
	      read standard input and encode it into a structured-appended symbols in case-insensitive mode.

AUTHOR

       Written by Kentaro Fukuchi.

RESOURCES

       Main Web Site: http://fukuchi.org/works/qrencode/

       Source code repository: https://github.com/fukuchi/libqrencode/

COPYRIGHT

       Copyright (C) 2006-2012 Kentaro Fukuchi.

qrencode 3.3.0							   Feb. 29, 2012						       QRENCODE(1)

Check Out this Related Man Page

PNGNQ(1)							   User Manuals 							  PNGNQ(1)

NAME

       pngnq - quantize png images

SYNOPSIS

       pngnq [-vfhV][-s sample_factor ][-Q dither ][-g gamma ][-e extension ][-d dir ][-n colors ][ inputfiles ]

DESCRIPTION

       pngnq  Quantizes  a 32-bit RGBA PNG image to an 8 bit RGBA palette PNG using the neuquant algorithm. The output file name is the input file
       name extended with "-nq8.png" or a specified extension.

OPTIONS

       -v     Verbose mode. Prints status messages.

       -f     Force ovewriting of files.

       -s sample factor
	      Sample factor. The neuquant algorithm samples pixels stepping by this value.  The default value of 3 gives good results. Higher val-
	      ues sample less of the image pixels and thus are faster but less accurate. A factor of 1 samples every image pixel.

       -n colors
	      Specifies the number of colors to quantize to. Defaults to 256 which is the maximum.  The minimum here is 2.

       -Q dither
	      Choose a dithering method: n = no dither (default), f = Floyd Steinberg dithering.

       -g gamma
	      Set the image gamma correction. If not present, uses the png file's gamma or defaults to 1.0.

       -e extension
	      Specifies the new filename extension. Defaults to "-nq8.png".  Pngnq drops .png from the original filenames. If you set the argument
	      of the -e option to .png and choose the -f option the input file will be overwritten.

       -d dir Tells pngnq to put output files in a directory other than the one the input files are in.

       input files
	      The png files to be processed. Defaults to standard input if not specified.  If standard input is being processed the output is sent
	      to standard output.

       -h     Print program help.

       -V     Print version number and library versions.

BUGS

       Does not deal correctly with greyscale alpha images with low bit depths, but these wont benefit from quantizing.

AUTHOR

       Stuart Coyle <stuart.coyle@gmail.com>

SEE ALSO

       png(5)

Linux								     MAY 2009								  PNGNQ(1)
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