在树莓派3 Ubuntu 16.04 Mate中安装OpenCV

1. Install OpenCV in Ubuntu:

(1) Update the list of package repositories:

1. sudoapt-getupdate
2. sudoapt-getupgrade

(2) Remove prevIoUsly installed FFMPEG and x264 libraries:

1. sudoapt-getremoveffmpegx264-dev

(3) Install the necessary packages for compiling the OpenCV sources:

1. sudoapt-getinstallocl-icd-libopencl1build-essentialcheckinstallcmakepkg-configyasmlibjpeg-devlibjasper-devlibavcodec-devlibavformat-devlibswscale-devlibdc1394-22-devlibxine2-devlibgstreamer0.10-devlibgstreamer-plugins-base0.10-devlibv4l-devpython-devpython-numpylibtbb-devlibqt4-devlibgtk2.0-devlibfaac-devlibmp3lame-devlibopencore-amrnb-devlibopencore-amrwb-devlibtheora-devlibvorbis-devlibxvidcore-devx264v4l-utils

(4) Make a directory to download and build OpenCV:

1. mkdiropencv
2. cdopencv

(5) Download the OpenCV sources for Linux,then unzip it:

1. wget-Oopencv-2.4.10.ziphttp://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.4.10/opencv-2.4.10.zip/download
2. unzipopencv-2.4.10.zip
3. cdopencv-2.4.10

(6) Create a directory to compile the OpenCV sources:

1. mkdirbuild
2. cdbuild

(7) Building OpenCV sources with CMake and install:

1. cmake-DCMAKE_BUILD_TYPE=RELEASE-DCMAKE_INSTALL_PREFIX=/usr/local-DWITH_TBB=ON-DINSTALL_PYTHON_EXAMPLES=ON-DBUILD_EXAMPLES=ON-DWITH_QT=ON-DWITH_OPENGL=ON..

(8) Make and install:

1. make
2. sudomakeinstall
3. sudosh-c'echo"/usr/local/lib">/etc/ld.so.conf.d/opencv.conf'
4. sudoldconfig

(9) Restart the system for everything to take effect:

1. sudoshutdown-rNow

2. Test OpenCV in Ubuntu:

(1) Create a directory displayImage for test project:

1. mkdirdisplayImage
2. cddisplayImage

(2) Create displayImage.cpp and edit it:

1. geditdisplayImage.cpp

Then edit the displayImage.cpp:

1. #include<stdio.h>
2. #include<opencv2/opencv.hpp>
3. usingnamespacecv;
5. intmain(intargc,char**argv)
6. {
7. if(argc!=2)
8. {
9. printf("usage:displayImage.out<Image_Path>\n");
10. return-1;
11. }
13. Matimage;
14. image=imread(argv[1],1);
16. if(!image.data)
17. {
18. printf("Noimagedata\n");
19. return-1;
20. }
22. namedWindow("displayImage",CV_WINDOW_AUTOSIZE);
23. imshow("displayImage",image);
25. waitKey(0);
26. return0;
27. }

(3) Create a CMake file:

1. geditCMakeLists.txt

Then edit the CMakeLists.txt:

1. cmake_minimum_required(VERSION2.8)
2. project(displayImage)
3. find_package(OpenCVrequired)
4. add_executable(displayImagedisplayImage.cpp)
5. target_link_libraries(displayImage${OpenCV_LIBS})

(4) Generate the executable file:

1. cmake.
2. make

(5) Execute it:

1. ./displayImagelena.jpg

lena.jpg is the test image

ffmpeg error:

cmake ........ -D WITH_FFMPEG=OFF