我想在 raspberry-pi 上进行图像处理。
为此，首先我想在 Ubuntu 中进行此操作。
当我运行命令时sudo apt-get install libopencv-dev，我得到了以下输出：
naveen@ubuntu:~$ sudo apt-get install libopencv-dev
[sudo] password for naveen:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
gir1.2-ubuntuoneui-3.0 firefox-locale-en language-pack-kde-en cabextract
kde-l10n-engb libjpeg62 libubuntuoneui-3.0-1 thunderbird-globalmenu
language-pack-en-base language-pack-kde-en-base language-pack-en
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
debhelper dh-apparmor gettext html2text intltool-debian libatk1.0-dev
libavcodec-dev libavformat-dev libavutil-dev libcairo-script-interpreter2
libcairo2-dev libdc1394-22-dev libexpat1-dev libfontconfig1-dev
libfreetype6-dev libgdk-pixbuf2.0-dev libgettextpo0 libglib2.0-dev
libgtk2.0-dev libice-dev libilmbase-dev libmail-sendmail-perl
libopencv-calib3d-dev libopencv-calib3d2.3 libopencv-contrib-dev
libopencv-contrib2.3 libopencv-core-dev libopencv-core2.3
libopencv-features2d-dev libopencv-features2d2.3 libopencv-flann-dev
libopencv-flann2.3 libopencv-gpu-dev libopencv-gpu2.3 libopencv-highgui-dev
libopencv-highgui2.3 libopencv-imgproc-dev libopencv-imgproc2.3
libopencv-legacy-dev libopencv-legacy2.3 libopencv-ml-dev libopencv-ml2.3
libopencv-objdetect-dev libopencv-objdetect2.3 libopencv-video-dev
libopencv-video2.3 libopenexr-dev libpango1.0-dev libpcre3-dev libpcrecpp0
libpixman-1-dev libpng12-dev libpthread-stubs0 libpthread-stubs0-dev
libraw1394-dev libsm-dev libswscale-dev libsys-hostname-long-perl
libunistring0 libx11-dev libx11-doc libxau-dev libxcb-render0-dev
libxcb-shm0-dev libxcb1-dev libxcomposite-dev libxcursor-dev libxdamage-dev
libxdmcp-dev libxext-dev libxfixes-dev libxft-dev libxi-dev libxinerama-dev
libxrandr-dev libxrender-dev po-debconf x11proto-composite-dev
x11proto-core-dev x11proto-damage-dev x11proto-fixes-dev x11proto-input-dev
x11proto-kb-dev x11proto-randr-dev x11proto-render-dev x11proto-xext-dev
x11proto-xinerama-dev xorg-sgml-doctools xtrans-dev
Suggested packages:
dh-make gettext-doc libfaad-dev libgsm1-dev libogg-dev libschroedinger-dev
libspeex-dev libtheora-dev libvorbis-dev libcairo2-doc libglib2.0-doc
libgtk2.0-doc libpango1.0-doc libraw1394-doc libxcb-doc libmail-box-perl
Recommended packages:
libraw1394-tools
The following NEW packages will be installed:
debhelper dh-apparmor gettext html2text intltool-debian libatk1.0-dev
libavcodec-dev libavformat-dev libavutil-dev libcairo-script-interpreter2
libcairo2-dev libdc1394-22-dev libexpat1-dev libfontconfig1-dev
libfreetype6-dev libgdk-pixbuf2.0-dev libgettextpo0 libglib2.0-dev
libgtk2.0-dev libice-dev libilmbase-dev libmail-sendmail-perl
libopencv-calib3d-dev libopencv-calib3d2.3 libopencv-contrib-dev
libopencv-contrib2.3 libopencv-core-dev libopencv-core2.3 libopencv-dev
libopencv-features2d-dev libopencv-features2d2.3 libopencv-flann-dev
libopencv-flann2.3 libopencv-gpu-dev libopencv-gpu2.3 libopencv-highgui-dev
libopencv-highgui2.3 libopencv-imgproc-dev libopencv-imgproc2.3
libopencv-legacy-dev libopencv-legacy2.3 libopencv-ml-dev libopencv-ml2.3
libopencv-objdetect-dev libopencv-objdetect2.3 libopencv-video-dev
libopencv-video2.3 libopenexr-dev libpango1.0-dev libpcre3-dev libpcrecpp0
libpixman-1-dev libpng12-dev libpthread-stubs0 libpthread-stubs0-dev
libraw1394-dev libsm-dev libswscale-dev libsys-hostname-long-perl
libunistring0 libx11-dev libx11-doc libxau-dev libxcb-render0-dev
libxcb-shm0-dev libxcb1-dev libxcomposite-dev libxcursor-dev libxdamage-dev
libxdmcp-dev libxext-dev libxfixes-dev libxft-dev libxi-dev libxinerama-dev
libxrandr-dev libxrender-dev po-debconf x11proto-composite-dev
x11proto-core-dev x11proto-damage-dev x11proto-fixes-dev x11proto-input-dev
x11proto-kb-dev x11proto-randr-dev x11proto-render-dev x11proto-xext-dev
x11proto-xinerama-dev xorg-sgml-doctools xtrans-dev
0 upgraded, 90 newly installed, 0 to remove and 0 not upgraded.
Need to get 300 kB/32.4 MB of archives.
After this operation, 135 MB of additional disk space will be used.
Do you want to continue [Y/n]? y
Err http://archive.ubuntu.com/ubuntu/ precise-updates/main x11proto-core-dev all 7.0.22-1ubuntu0.1
Connection failed [IP: 91.189.91.13 80]
Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/x/x11proto-core/x11proto-core-dev_7.0.22-1ubuntu0.1_all.deb Connection failed [IP: 91.189.91.13 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
我能做些什么来解决这个错误？