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linux:qrcode
QR Code
色々あるけど基本的にバックエンドはZBar，最近はQtqrをよく使っている．
qreator
graphical utility for creating QR codes Qreator enables you to easily create your own QR codes to encode different types of information in an efficient, compact and cool way. . Qreator supports creating the following kinds of QR codes: - Business card - Geolocation - Phone call/SMS - Text - URL - Wi-Fi network
qrencode
QR Code encoder into PNG image Qrencode is a utility software using libqrencode to encode string data in a QR Code and save as a PNG or an EPS image.
$ qrencode
qrencode version 4.0.2
Copyright (C) 2006-2017 Kentaro Fukuchi
Usage: qrencode [OPTION]... [STRING]
Encode input data in a QR Code and save as a PNG or EPS image.
-h display this message.
--help display the usage of long options.
-o 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)
-r FILENAME read input data from FILENAME.
-s NUMBER specify module size in dots (pixels). (default=3)
-l {LMQH} specify error correction level from L (lowest) to H (highest).
(default=L)
-v NUMBER specify the minimum version of the symbol. (default=auto)
-m NUMBER specify the width of the margins. (default=4 (2 for Micro))
-d NUMBER specify the DPI of the generated PNG. (default=72)
-t {PNG,PNG32,EPS,SVG,XPM,ANSI,ANSI256,ASCII,ASCIIi,UTF8,ANSIUTF8}
specify the type of the generated image. (default=PNG)
-S make structured symbols. Version must be specified.
-k assume that the input text contains kanji (shift-jis).
-c encode lower-case alphabet characters in 8-bit mode. (default)
-i ignore case distinctions and use only upper-case characters.
-8 encode entire data in 8-bit mode. -k, -c and -i will be ignored.
-M encode in a Micro QR Code.
-V display the version number and copyrights of the qrencode.
[STRING] input data. If it is not specified, data will be taken from
standard input.
Try "qrencode --help" for more options.
$ qrencode -o ./test.png 'qrencode で作ったQR' $ file test.png test.png: PNG image data, 99 x 99, 1-bit colormap, non-interlaced $ display ./test.png $ qrscanner ./test.png ╔═════════════════════════╗ ║ ║ ║ qrencode で作ったQR ║ ║ ║ ╚═════════════════════════╝
$ qrencode ほげ -o - | display $ qrencode -l H -t ansiutf8 '😺' █████████████████████████████ █████████████████████████████ ████ ▄▄▄▄▄ █▀▄▄█ █ ▄▄▄▄▄ ████ ████ █ █ █ ▀▄█ █ █ ████ ████ █▄▄▄█ █ ▀█▀ █ █▄▄▄█ ████ ████▄▄▄▄▄▄▄█▄▀ ▀▄█▄▄▄▄▄▄▄████ █████▀▄██▄▄ ▄▄▀ ▄▄█▄▄ █████ █████▄▄▀▀▀▄▀▄ █▄█ ▄█▀█▀▄█████ ████████▄█▄▄▀▀█▀█ ▀██ ████ ████ ▄▄▄▄▄ █ █ ████ ▄▄ ██████ ████ █ █ ██▀ ▀█ ▄▄█▀█▄████ ████ █▄▄▄█ █▄█▀█▄▀▀█▀▄█▄▄████ ████▄▄▄▄▄▄▄████▄█▄▄██▄▄█▄████ █████████████████████████████ █████████████████████████████
ANSI,ANSI256,UTF8,ANSIUTF8 であれば端末に表示された物をそのまま読み込めた．
ASCII,ASCIIi は加工向け?
QtQR
Qt frontend for QR code generator and decoder A Qt based software that help you to generate QR codes easily, scan an image file for QR codes and decode them or use your webcam to scan a printed one.
qr-scanner-cli
zbarを使っていないnode実装のよう．
$ qrscanner --version
1.2.2
$ qrscanner --help
[](https://travis-ci.org/victorperin/qr-scanner-cli) [](https://coveralls.io/github/victorperin/qr-scanner-cli?branch=master) [](https://greenkeeper.io/) [](https://codeclimate.com/github/victorperin/qr-scanner-cli/maintainability)
Usage
$ qrscanner <input file>
Options
--clear, -c Clear output, just print the QR Code scan result
--clipboard, -p Copy the qr code value to your clipboard
--open, -o Open the qr code value in any browser or program if support it
--version Show installed version
--help Show this help
Examples
$ qrscanner ./qrCode.jpg
╔══════════════════════════════════════════╗
║ ║
║ This message is written in a QR Code ║
║ ║
╚══════════════════════════════════════════╝
$ qrscanner ./qrCode.jpg --clear
This message is written in a QR Code
$ qrencode -o ./test.jpg hogehoge $ qrscanner ./test.jpg ╔══════════════╗ ║ ║ ║ hogehoge ║ ║ ║ ╚══════════════╝ $ qrscanner ./test.jpg --clear hogehoge $ qrscanner ./test.jpg --clear --clipboard hogehoge $ xclip -o -selection clipboard hogehoge
ERROR
WebCamを他のアプリで利用中に「Decode from Webcam」でアプリが落ちる
$ qtqr
QPixmap::scaled: Pixmap is a null pixmap
libv4l2: error setting pixformat: Device or resource busy
libv4l2: error setting pixformat: Device or resource busy
libv4l2: error setting pixformat: Device or resource busy
libv4l2: error setting pixformat: Device or resource busy
WARNING: no compatible input to output format
...trying again with output disabled
libv4l2: error setting pixformat: Device or resource busy
libv4l2: error setting pixformat: Device or resource busy
Traceback (most recent call last):
File "/usr/bin/qtqr", line 834, in decodeWebcam
qr.decode_webcam(device=device)
File "/usr/lib/python3/dist-packages/qrtools.py", line 240, in decode_webcam
proc.init(device)
zbar.UnsupportedError: <zbar.Processor object at 0x7fc78602f180>
Aborted
関連URL
関連書籍?
linux/qrcode.txt · 最終更新: 2020/12/04 06:01 by matoken
特に明示されていない限り、本Wikiの内容は次のライセンスに従います： CC Attribution-Noncommercial-Share Alike 4.0 International
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