Ubuntu16.04下安装并使用java调用opencv

一、配置基本环境

1、设置root密码

sudo passwd root

2、安装vim

sudo apt-get remove vim-common
sudo apt-get install vim

3、开启SSH

ps -e|grep ssh
sudo apt-get install openssh-server
sudo vi /etc/ssh/sshd_config

#PermitRootLogin without-password #注释掉这行
PermitRootLogin yes #增加这行
sudo service ssh start
ps -e|grep ssh

4、开放22端口

sudo apt-get install iptables
sudo iptables -I INPUT -p tcp --dport 80 -j ACCEPT
sudo iptables -I INPUT -p tcp --dport 8099 -j ACCEPT
sudo iptables -I INPUT -p tcp --dport 3306 -j ACCEPT
sudo iptables-save

5、持久化

sudo apt-get install iptables-persistent
sudo netfilter-persistent save
sudo netfilter-persistent reload
reboot

二、配置java环境

1、下载linux java的jdk上传到/usr/local/java

tar -zxvf jdk-8u161-linux-x64.tar.gz
vim /etc/profile
 
#set Java environmen
export JAVA_HOME=/usr/local/java/jdk1.8.0_161
export JRE_HOME=${JAVA_HOME}/jre
 
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=/usr/bin:${JAVA_HOME}/bin:$PATH
 
source /etc/profile
 

三、安装ant

1、解压tar -zxvf apache-ant-1.9.15-bin.tar.gz

2、修改配置文件vim /etc/profile

#set Java environmen
export JAVA_HOME=/usr/local/java/jdk1.8.0_161
export JRE_HOME=${JAVA_HOME}/jre
 
export ANT_HOME=/usr/local/java/apache-ant-1.9.15
 
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=/usr/bin:${JAVA_HOME}/bin:$ANT_HOME/bin:$PATH

3、刷新source /etc/profile 查看版本ant -version

四、安装opencv

1、下载opencv-4.4.0.tar.gz

网址 https://www.bzblog.online/wordpress/index.php/2020/03/09/opencvdownload/

2、至/usr/local/java并解压

tar -zxvf opencv-4.4.0.tar.gz
cd opencv-4.4.0/

3、新建一个build文件夹

mkdir build
cd build/

4、下载cmake

apt install cmake  #先下载cmake
sudo apt-get install cmake  
sudo apt-get install build-essential libgtk2.0-dev libavcodec-dev libavformat-dev libjpeg.dev libtiff4.dev libswscale-dev libjasper-dev

如果 cmake编译出错：No CMAKE_CXX_COMPILER could be found.如下错误
使用sudo apt install -y build-essential解决

-- The CXX compiler identification is unknown
-- The C compiler identification is GNU 8.3.0
CMake Error at CMakeLists.txt:99 (enable_language):
  No CMAKE_CXX_COMPILER could be found.
 
  Tell CMake where to find the compiler by setting either the environment
  variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
  to the compiler, or to the compiler name if it is in the PATH.

5、在终端里输入

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local/java/opencv-4.4.0/build ..
make -j8
sudo make install

6、用cmake生成java的jar

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local/java/opencv-4.4.0/javaLib -DBUILD_TESTS=OFF ..

7、结束后输入如下口令

make -j8
sudo make install

8、结果

build/bin下有so文件、build/lib下有jar文件 表示操作成功