> For the complete documentation index, see [llms.txt](https://theiotlearninginitiative.gitbook.io/embedded-linux/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://theiotlearninginitiative.gitbook.io/embedded-linux/application-development/vision/bar-codes.md). # Bar Codes ## Bar Codes * [Bar Code Scanner with Webcam On Intel Edison](https://software.intel.com/en-us/blogs/2015/11/30/barcodescanner-with-webcam-on-intel-edison) * [Real Time QR Code Detection](http://blog.ayoungprogrammer.com/2014/04/real-time-qr-code-bar-code-detection.html/) ```bash root@edison:~# opkg install libv4l-dev Installing libv4l-dev (1.0.1-r0) on root. Downloading http://iotdk.intel.com/repos/3.5/iotdk/edison/core2-32/libv4l-dev_1.0.1-r0_core2-32.ipk. Installing libv4l (1.0.1-r0) on root. Downloading http://iotdk.intel.com/repos/3.5/iotdk/edison/core2-32/libv4l_1.0.1-r0_core2-32.ipk. Configuring libv4l. Configuring libv4l-dev. root@edison:~# cd /usr/include/linux root@edison:/usr/include/linux# ln -s /home/root/usr/src/linux-headers-3.10.98-poky-edison/include/linux/videodev2.h videodev.h root@edison:/usr/include/linux# cd - /home/root/zbar-0.10 ``` ### ImageMagick Installation Method Url ```bash root@edison:~# opkg install http://repo.opkg.net/edison/repo/core2-32/imagemagick_6.9.2-r0_core2-32.ipk root@edison:~# opkg install http://repo.opkg.net/edison/repo/core2-32/imagemagick-dev_6.9.2-r0_core2-32.ipk ``` ## ImageMagick Installation Method Automated ```bash root@edison:~# opkg install imagemagick imagemagick-dev Installing imagemagick (6.8.9-r0) on root. Downloading http://iotdk.intel.com/repos/3.5/iotdk/edison/core2-32/imagemagick_6.8.9-r0_core2-32.ipk. ... Configuring libtiff5. Configuring lcms. Configuring libfftw. Configuring libfontconfig1. Configuring imagemagick. Configuring gdk-pixbuf-dev. Configuring libharfbuzz0. Configuring libcroco. Configuring libxft2. Configuring libtiff-dev. Configuring libpixman-1-0. Configuring libcairo2. Configuring pango. Configuring pango-module-basic-fc. Configuring lcms-dev. Configuring libfontconfig-dev. Configuring librsvg-2-2. Configuring libcairo-gobject2. Configuring libcairo-script-interpreter2. Configuring libcairo-perf-utils. Configuring libpixman-1-dev. Configuring libcairo-dev. Configuring libcroco-dev. Configuring libharfbuzz-dev. Configuring libxft-dev. Configuring pango-dev. Configuring librsvg-2-dev. Configuring imagemagick-dev. root@edison:~# ``` ### Zbar Installation Manual ```bash root@edison:~# wget http://sourceforge.net/projects/zbar/files/zbar/0.10/zbar-0.10.tar.bz2 root@edison:~# tar xvf zbar-0.10.tar.bz2 root@edison:~# cd zbar-0.10 root@edison:~/zbar-0.10# ls COPYING Makefile.in config include test zbar.pc.in ChangeLog NEWS configure perl zbar zbarcam HACKING README configure.ac plugin zbar-gtk.pc.in zbarimg INSTALL README.windows doc pygtk zbar-qt.pc.in LICENSE TODO examples python zbar.ico Makefile.am aclocal.m4 gtk qt zbar.nsi root@edison:~/zbar-0.10# ./configure --without-qt --without-gtk --without-xv --without-xshm --with-imagemagick --with-x=no --prefix="/usr" ``` ``` please verify that the detected configuration matches your expectations: ------------------------------------------------------------------------ X --with-x=disabled pthreads --enable-pthread=yes v4l --enable-video=no => zbarcam video scanner will *NOT* be built jpeg --with-jpeg=yes Magick++ --with-imagemagick=yes Python --with-python=yes GTK+ --with-gtk=no => the GTK+ widget will *NOT* be built Qt4 --with-qt=no => the Qt4 widget will *NOT* be built ``` ```bash root@edison:~/zbar-0.10# rm libtool root@edison:~/zbar-0.10# ln -s /usr/bin/libtool libtool ``` ```bash root@edison:~/zbar-0.10# make make all-am make[1]: Entering directory '/home/root/zbar-0.10'tp://repo.opkg.net/edison/repo/core2-32/i /bin/sh ./libtool --tag=CC --mode=link gcc -Wall -Wno-parentheses -g -O2 -o zbarimg/zbarimg zbarimg/zbarimg_zbarimg-zbarimg.o -lMagickWand-6.Q16 -lMagickCore-6.Q16 zbar/libzbar.la -ljpeg -lpthread libtool: link: cannot find the library `=/usr/lib/libMagickCore-6.Q16.la' or unhandled argument `=/usr/lib/libMagickCore-6.Q16.la' Makefile:1270: recipe for target 'zbarimg/zbarimg' failed make[1]: *** [zbarimg/zbarimg] Error 1 make[1]: Leaving directory '/home/root/zbar-0.10' Makefile:820: recipe for target 'all' failed make: *** [all] Error 2 root@edison:~/zbar-0.10# cd root@edison:~# ``` ### Zbar Installation Automated ```bash root@edison:~# opkg install zbar Installing zbar (0.10-r0) on root. Downloading http://repo.opkg.net/edison/repo/core2-32/zbar_0.10-r0_core2-32.ipk. Configuring zbar. root@edison:~# ``` ```bash root@edison:~# zbarcam -h usage: zbarcam [options] [/dev/video?] scan and decode bar codes from a video stream options: -h, --help display this help text --version display version information and exit -q, --quiet disable beep when symbol is decoded -v, --verbose increase debug output level --verbose=N set specific debug output level --xml use XML output format --raw output decoded symbol data without symbology prefix --nodisplay disable video display window --prescale=x request alternate video image size from driver -S[=], --set [=] set decoder/scanner to (or 1) root@edison:~# ``` --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. 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