opencv：win10下clion+opencv+mingw-64环境搭建

前提准备

• win10-clion环境准备

下载opencv源码

1、下载最新版本Opencv4软件压缩包

2、解压

得到：

编译

生成Makefile

在cmake里面找到OPENCV_ENABLE_ALLOCATOR_STATS或者在search里面搜索，然后把后面的勾选去掉

点击Configurate

错误1：

CMake Warning at cmake/OpenCVDownload.cmake:202 (message):
  FFMPEG: Download failed: 6;"Couldn't resolve host name"

  For details please refer to the download log file:

  E:/software/opencv/install/CMakeDownloadLog.txt

Call Stack (most recent call first):
  3rdparty/ffmpeg/ffmpeg.cmake:20 (ocv_download)
  modules/videoio/cmake/detect_ffmpeg.cmake:14 (download_win_ffmpeg)
  modules/videoio/cmake/init.cmake:3 (include)
  modules/videoio/cmake/init.cmake:22 (add_backend)
  cmake/OpenCVModule.cmake:312 (include)
  cmake/OpenCVModule.cmake:375 (_add_modules_1)
  modules/CMakeLists.txt:7 (ocv_glob_modules)

解决方法

• 进入 IPAddress.com 网站查询raw.githubusercontent.com真实地址。
• 打开C:\Windows\System32\drivers\etc\hosts,(需要使用管理员权限打开)
  追加199.232.96.133 raw.githubusercontent.com如下：
  

重新Configure， 配置成功。
配置成功之后选择Generate:


表示生成了Makefile

编译

生成好Makefile之后，我们开始编译Opencv源代码

即可打开cmd，然后执行命令mingw32-make install

等待编译完成

配置环境变量

编译成功之后我们只需要将opencv\build\include，opencv\install\bin, opencv\install\lib目录添加到环境变量中即可

clion中开始使用

cmake_minimum_required(VERSION 3.15)
project(untitled)


set(CMAKE_CXX_STANDARD 14)

# Find OpenCV, you may need to set OpenCV_DIR variable
# to the absolute path to the directory containing OpenCVConfig.cmake file
# via the command line or GUI
# set(OpenCV_DIR "E:\\software\\opencv\\build\\x64\\vc15\\lib")
find_package( OpenCV REQUIRED)


# If the package has been found, several variables will
# be set, you can find the full list with descriptions
# in the OpenCVConfig.cmake file.
# Print some message showing some of them
message(STATUS "OpenCV library status:")
message(STATUS "    version: ${OpenCV_VERSION}")
message(STATUS "    libraries: ${OpenCV_LIBS}")
message(STATUS "    include path: ${OpenCV_INCLUDE_DIRS}")

# Add OpenCV headers location to your include paths
include_directories( ${OpenCV_INCLUDE_DIRS} )


# Declare the executable target built from your sources
add_executable(${PROJECT_NAME} main.cpp )


target_link_libraries( ${PROJECT_NAME}  ${OpenCV_LIBS})

#include 
#include 
using namespace cv;
int main(int argc, char** argv )
{
    Mat image;
    image = imread( "C:\\Users\\oceanstar\\Pictures\\Camera Roll\\test.jpg", 1 );
    if ( !image.data )
    {
        printf("No image data \n");
        return -1;
    }
    namedWindow("Display Image", WINDOW_AUTOSIZE );
    imshow("Display Image", image);
    waitKey(0);
    return 0;
}

编译运行：

> mkdir build
> cd build
> CMake -G "MinGW Makefiles" ../
> mingw32-make