122 lines
3.7 KiB
Markdown
122 lines
3.7 KiB
Markdown
---
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title: opencv编译安装
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date: 2018-1-10 09:24:53
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tags:
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- linux
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- opencv
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categories:
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- linux
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---
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### 依赖库安装
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#### ubuntu系统
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```bash
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apt-get install build-essential
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apt-get install cmake libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
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apt-get install python-dev python-numpy libtbb2 libtbb-dev libjasper-dev libdc1394-22-dev
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```
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(上面大部分的库ubuntu都自带的 , 安装有问题就跳过)
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如果需要用java开发
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则需要安装ant
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apt-get install ant
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<!-- more -->
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#### centos系统
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```bash
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yum -y install epel-release
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yum install gcc gcc-c++
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yum install cmake
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yum install python-devel numpy
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yum install gtk2-devel
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yum install libdc1394-devel
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yum install libv4l-devel
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yum install gstreamer-plugins-base-devel
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```
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如果需要用java开发
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则需要安装ant
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```bash
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yum install ant
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```
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创建install-ffmpeg.sh
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授权chmod +x install-ffmpeg.sh
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并执行./install-ffmpeg.sh
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内容如下
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```bash
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sudo rpm –import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
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yum repolist
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sudo rpm –import http://li.nux.ro/download/nux/RPM-GPG-KEY-nux.ro
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sudo rpm -Uvh http://li.nux.ro/download/nux/dextop/el7/x86_64/nux-dextop-release-0-1.el7.nux.noarch.rpm
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yum repolist
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yum update -y
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yum install -y ffmpeg
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ffmpeg -version
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```
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yum install ffmpeg-devel
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### 编译与安装
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> 注意 : 上面在安装ant的过程 , 会自动安装`openjdk-jre`
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但是此时只有jre , 没有jdk , 要编译出java程序可用的jar包和原生库 , 必须有jdk才行
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通过apt安装openjdk的jdk可以 , 下载oracle的jdk也可以 , 不过后者需要手动加入到环境变量
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```bash
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mkdir build
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mkdir install
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cd build
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cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/root/opencv-3.4.1/install -DBUILD_TESTS=OFF ..
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make && make install
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```
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> 如果ANT和JNI都有值的话就没问题 , JNI没有值的话可能是因为没装jdk , 或者没有加入环境变量PATH当中
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编译也不会报错 , 只不过编译后不会生成jar包和opencv_java341.so的原生库
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CMAKE_INSTALL_PREFIX表示安装的目标位置
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如果执行过程中
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`ippicv_2017u3_lnx_intel64_general_20170822.tgz`
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下载过慢或失败
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可以手动下载这个包放到.cache/ippicv目录下
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文件名需要加上md5 ( 可以使用md5sum命令得到 )
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也就是
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4e0352ce96473837b1d671ce87f17359-ippicv_2017u3_lnx_intel64_general_20170822.tgz
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### java调用C/C++模块
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#### linux
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程序运行前需要添加环境变量
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```bash
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export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/native
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```
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(就是编译后的安装目录里面lib(或者是lib64)当中所有.so文件 以及libopencv_java341.so 都放在该目录下)
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之后创建并执行如下shell脚本
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```bash
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native_folder=/usr/local/native
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for so_file in ${native_folder}/*
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do
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file_name=`basename ${so_file}`
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if [ ${file_name} = "libopencv_java341.so" ];then
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continue
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fi
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`ln -s ${so_file} ${so_file}.3.4`
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echo "已创建软连接${so_file}.3.4"
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done
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```
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native_folder就是放置.so文件的目录 , 根据实际情况而定
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#### windows
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需要把`opencv_java341.dll`文件放到`%JAVA_HOME%/jre/bin`里面
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### maven本地安装jar包
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要在maven项目当中引入这个jar包使用 , 并且保证打包过程正确加入这个jar包
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可以手动安装到本地maven仓库
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```
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mvn install:install-file -Dfile=opencv-341.jar -DgroupId=org.opencv -DartifactId=opencv -Dversion=3.4.1 -Dpackaging=jar
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```
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当然也可以选择不安装到本地仓库
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而是直接放进项目里面 , 比如说放在了项目里的lib目录下
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```xml
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<dependency>
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<groupId>org.opencv</groupId>
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<artifactId>opencv</artifactId>
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<version>3.4.1</version>
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<scope>system</scope>
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<systemPath>${pom.basedir}/lib/opencv-341.jar</systemPath>
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</dependency>
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``` |