/study-opencv

Details of installing opencv.

Primary LanguageC++

wiki

References

Install

官方推荐依赖：

[compiler] sudo apt-get install build-essential
[required] sudo apt-get install cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
[optional] sudo apt-get install python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev

OPENGL 支持依赖库：

sudo apt-get install freeglut3-dev \
                     mesa-common-dev \
                     libgtkglext1 \
                     libgtkglext1-dev

视频解码支持依赖库：

sudo apt-get install checkinstall \
                     yasm \
                     libgstreamer0.10-dev \
                     libgstreamer-plugins-base0.10-dev \
                     libv4l-dev \
                     libtbb-dev \
                     libqt4-dev \
                     libgtk2.0-dev \
                     libmp3lame-dev \
                     libtheora-dev \
                     libvorbis-dev \
                     libxvidcore-dev \
                     x264 \
                     v4l-utils

其它可能依赖项：

sudo apt-get install libgphoto2-dev \
                     libavresample-dev \ 
                     liblapacke-dev \
                     gtk+-3.0 \
                     libgtk-3-dev \ 
                     libeigen3-dev \ 
                     tesseract-ocr \
                     liblept5 \
                     leptonica-progs \
                     libleptonica-dev

下载：

$ wget http://downloads.sourceforge.net/project/opencvlibrary/opencv-unix/2.4.13/opencv-2.4.13.zip
$ unzip opencv-2.4.13.zip
$ cd opencv-2.4.13
$ mkdir release
$ cd release

编译：

$ cmake -D CMAKE_BUILD_TYPE=RELEASE \
        -D CMAKE_INSTALL_PREFIX=/usr/local/opencv34 ..
#       -D WITH_TBB=ON 
#       -D BUILD_NEW_PYTHON_SUPPORT=ON \
#       -D WITH_V4L=ON \
#       -D WITH_QT=ON \
#       -D WITH_OPENGL=ON
$ make -j4
$ sudo make install

参考：

opencv3 in ubuntu

  1. 配置/etc/ld.so.conf.d/opencv.conf，再ldconfig
  2. 配置bash.bashrc（.bashrc或.zshrc）
  3. updatedb
  4. CMakeLists.txt

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)
set(OpenCV_DIR "/usr/local/opencv2/share/OpenCV")
project( Display )
//set(OpenCV_FOUND 1)
find_package( OpenCV REQUIRED )
add_executable( Display display.cpp )
target_link_libraries( Display ${OpenCV_LIBS} )

pkg-config:
https://blog.csdn.net/newchenxf/article/details/51750239

Notes

opencv doc

构造和赋值

Mat A, C;                                 // creates just the header parts
A = imread(argv[1], CV_LOAD_IMAGE_COLOR); // here we'll know the method used (allocate matrix)
Mat B(A);                                 // Use the copy constructor
C = A;                                    // Assignment operator

上述对象，都指向同一个矩阵。
Mat(int _rows, int _cols, int _type, void* _data, size_t _step=AUTO_STEP);

Troubleshooting

warning: CPACK_PACKAGE_VERSION does not match version provided by version.hpp header!

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