windows：

1.官网下载windows安装包

2.安装完成后，复制opencv\build\java\x64\opencv_java451.dll 到 C:\Windows 下

centos： 

参考https://www.cnblogs.com/huizhipeng/p/12732019.html

1.先安装cmake3 参考https://www.jianshu.com/p/20dfd94b717e

2.官网下载sources压缩包

3.解压unzip opencv.zip && cd opencv-4.5.1

4.创建build文件夹mkdir build

5.cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -DBUILD_TESTS=OFF ..

6.make -j8

7.make install

8.在opencv-4.5.1/build/lib中查看libopencv_java451.so文件和 jar文件

9.将libopencv_java451.so复制到usr/lib中

1.java调用：

1.maven依赖

<dependency>

    <groupId>org.openpnp</groupId>

    <artifactId>opencv</artifactId>

    <version>4.5.1-2</version>

</dependency>

2.加载库文件

System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

之后可进行其他代码操作

3.可能的报错

no opencv_javaXXX in java.library.path： 复制dll文件到C:\Windows 或复制os文件到usr/lib下

cant find dependent librarie

二、open cv 安装

cmake -D WITH_TBB=ON -D WITH_EIGEN=ON .. cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=user/local/opencv -D OPENCV_EXTRA_MODULES_PATH=/software/opencv-4.6.0/opencv_contrib-4.6.0/modules/ .. make&&make install

cmake -D WITH_TBB=ON -D WITH_EIGEN=ON .. cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/software/opencv-4.6.0/ -D OPENCV_EXTRA_MODULES_PATH=/software/opencv-4.6.0/opencv_contrib-4.6.0/modules/ .. make&&make install

yum install ant

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX= -DBUILD_TESTS=OFF ..

make -j8

make install

三、opencv依赖包安装

#报错 cmake 编译命令用不着可以不用执行 ffmpeg 命令不能用单独安装

yum -y install epel-release 替换 sudo amazon-linux-extras install epel

yum install gcc gcc-c++

yum install cmake

yum install python-devel numpy

yum install ffmpeg-devel

yum install -y unzip zip 线上存在

yum install gtk+-devel gimp-devel gimp-devel-tools gimp-help-browser zlib-devel

yum install gkt+-devel

yum install gimp-devel

yum install gimp-devel-tools

yum install gimp-help-browser

yum install zlib-devel

安装ffmpeg

sudo yum install epel-release

sudo rpm -v --import http://li.nux.ro/download/nux/RPM-GPG-KEY-nux.ro

sudo rpm -Uvh http://li.nux.ro/download/nux/dextop/el7/x86_64/nux-dextop-release-0-5.el7.nux.noarch.rpm

sudo yum install ffmpeg ffmpeg-devel

ffmpeg -version

ffmpeg 命令无法执行就执行代码编译安装

wget https://johnvansickle.com/ffmpeg/release-source/ffmpeg-4.1.tar.xz

解压ffmpeg文件：

xz -d ffmpeg-4.1.tar.xz

tar -xf ffmpeg-4.1.tar

Linux下安装yasm-1.3.0详细说明

①wget http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz #下载源码包

②tar zxvf yasm-1.3.0.tar.gz #解压

③cd yasm-1.3.0 #进入目录

④./configure #配置

⑤make && make install #编译安装

##切换ffmpeg 命令 编译ffmpeg

./configure --enable-shared --prefix=/usr/local/ffmpeg make && make install

https://knight.blog.csdn.net/article/details/103736930?spm=1001.2101.3001.6661.1&utm_medium=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7ECTRLIST%7EPayColumn-1-103736930-blog-81742177.pc_relevant_aa2&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7ECTRLIST%7EPayColumn-1-103736930-blog-81742177.pc_relevant_aa2&utm_relevant_index=1

1、修改环境变量

将ffmpeg的绝对路径添加到PATH环境变量中，以让系统能找到ffmpeg的安装路径。

vim ~/.bashrc # 打开系统环境变量配置文件

source ~/.bashrc 生效

在文件中添以下内容。

export PATH="/usr/local/ffmpeg/bin:${PATH}" export LD_LIBRARY_PATH="/usr/local/ffmpeg/lib:{LD_LIBRARY_PATH}"

1、ffmpeg-添加环境变量

编译完成后，进入/etc/profile中将ffmpeg加入到环境变量

vim /etc/profile

（在文件最后加上export PATH=/usr/local/ffmpeg/bin:$PATH）

# source /etc/profile 

#ffmpeg 配置不生效 增加ffmpeg.config文件 /usr/local/ffmpeg/lib

刷新配置

ldconfig

测试ffmpeg版本号是否生效

ffmpeg -version

cd /etc

cd ld.so.conf.d

2、opencv-添加环境变量输入命令：vi /etc/profile在末尾加入：export PATH=/usr/local/bin:$PATH 变量：source /etc/profile

执行

opencv_version 验证是否起作用

sudo yum install -y libwebp-tools

//报错imison

yum install ImageMagick

//配置映射

linux 缺少动态连接库.so(cannot open shared object file: No such file or directory)解决办法_linux编译opencv缺少动态库文件_Kena_M的博客-CSDN博客

CentOS 7

sudo rpm --import http://li.nux.ro/download/nux/RPM-GPG-KEY-nux.ro

sudo rpm -Uvh http://li.nux.ro/download/nux/dextop/el7/x86_64/nux-dextop-release-0-5.el7.nux.noarch.rpm

apt-get 安装 先用yum 尝试安装

sudo apt-get install mesa-common-dev libglu1-mesa-dev libglew1.5-dev libxtst-dev libxrandr-dev libpng12-dev libjpeg-dev zlib1g-dev libbz2-dev libogg-dev libvorbis-dev libc6-dev yasm libasound-dev libpulse-dev libjack-dev binutils-dev libgtk2.0-dev libmad0-dev libjack0 libudev-dev libva-dev

#opencv 依赖项 安装

sudo apt-get install build-essential |

yum install make glibc-devel gcc patch

 yum install gcc gcc-c++ kernel-devel 安装替代 build-essential

sudo apt-get install build-essential libgtk2.0-dev libavcodec-dev libavformat-dev libjpeg-dev libswscale-dev libtiff5-dev

sudo apt-get install libgtk2.0-dev

#替代方案

在centos7下安装OpenCV 3.4.4 - 简书

sudo libtiff5-dev 替代方案

yum list | grep "libtiff"

yum -y install libtiff.x86_64

sudo apt-get install pkg-config 备用方案

(40条消息) 如何安装pkg-config_Elonjelinek的博客-CSDN博客_pkg-config安装

apt-get remove python-opencv sudo yum install python-opencv

sudo yum install -y libwebp-tools

find / cd-name ".bashrc"

#配置所在目录

cd /etc

cd ld.so.conf.d

#增加opencv.confg 配置文件 /usr/local/lib64 /user/local/lib

//修改刷新配置

vim /etc/ld.so.conf 查看 加载所有配置文件

ldconfig

opencv_version

查看linux 空间

df -h