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windows+clion+mingw+opencv环境配置

windows+clion+mingw+opencv环境配置/windows上源码编译opencv450

零、主要参考

非常感谢知乎上的一位博主，详细记录了在windows系统clion上配置opencv4.2的过程，参考这里。

一、写在开始

我的初衷应该和很多人一样，习惯了jetbrains的一些风格，而且十分厌恶VS占用的空间太大，所以就想另寻出路，在喜欢的clion上配置opencv环境。

前一段时间在ubuntu的clion上配置过opencv，但看论文什么的还都是在windows上，来回切换系统实在费劲，所以就想在windows上配置好环境。windows上配置此环境就不如在Ubuntu上如此顺利，遇到了一些列复杂的问题，我从昨天开始配置，一直弄到了今天下午结束，才算把这一过程熟悉，所以在此记录一下配置的过程，以备后用，如果能帮助到看到此blog的你，那你就感谢我和原博主吧。

下面的所有截图是我在按照原博主编译opencv4.2和我后来重新编译opencv4.5时的，可能有一些对应不上，但版本问题影响不大，看的时候稍微注意一下，祝你顺利！

二、准备工作/preparation

2.1 下载 opencv 源码

在 github 上下载 opencv 的源码，我下载的版本也是和原博主下的一样(刚开始怕配置失败，和原博主保持了一致)，但版本应该问题不大。

opencv 源码 github地址

opencv_contrib 源码 github地址

下载完并解压之后放在同一目录下(D:\OpenCV)，如下图所示：

[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-ITd3Halm-1610479952380)(D:\Typora\cpz笔记\笔记中的图片\下载opencv和contrib.png)]

2.2 mingw 编译器

2.2.1 mingw 编译器下载

编译器用来编译c++代码，运行c++代码必须依靠编译器，所以需要一个编译器，这里选择mingw编译器。

MinGW 官网下载地址

(照搬原博主的解释)：

x86_64：64位
posix ：启用C ++ 11 / C11多线程功能。使libgcc依赖于libwinpthreads，所以即使不直接调用pthreads API，也会分发winpthreads DLL。分配一个更多的DLL与您的应用程序没有任何问题。
win32 ：没有C ++ 11多线程功能。
sjlj，seh，dwarf都是异常处理模型。sjlj和seh是64位上的处理模型，sjlj是 C 标准库就有的东西，seh是2014年新发明的，seh较新性能较好。dwarf 和 sjlj 是32位上的两种异常处理模型。同样的，dwarf 的性能要优于 sjlj ，但是它不支持 64位。

所以这里选择下载的是x86_64-posix-seh。(我用的是我之前下载的 x86_64-8.1.0-release-posix-sjlj-rt_v6-rev0，也可以正常使用)

2.2.2 将 mingw 加入系统变量

然后将 mingw 加入到系统变量PATH(Path)中：

D:\mingw64\bin

该路径根据你的安装修改即可。

2.2.3 测试 mingw 安装

win+R —> 输入cmd—> 回撤，打开terminal
输入 gcc -v 查看安装的编译器版本，能看到大致如下的版本信息即安装成功：

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2.3 CLion的下载与安装

下载地址：

CLion官网下载地址

安装过程在此不做赘述，很简单，不会的另外搜索。

主要是下载好之后，将mingw选择为clion的编译器，依次在CLion中选择：

File—> Settings —> Build,Execution,Development —> Toolchains

在右侧的Environment处选择mingw的安装路径( 红色椭圆 )即可：[ 蓝色处保持默认Bundled即可 ]

2.4 CMake 安装

CMake 官网下载地址：

CMake 官网下载

下载时选择最新版本的上一个版本即可：

[ Binary distribution—> windows —> .msi 的安装文件 ]

安装时，都保持默认选项即可。

三、编译OpenCV源码

3.1、编译之前

按原博主的说法，如果之前曾安装过Anaconda或者python，请将这两个从系统环境变量Path/PATH 中先删除，不用卸载软件，因为在编译时会有冲突！！！别不信，我刚开始忘记删除，在编译时会跳红。

3.2 新建build目录

在OpenCV目录下新建mingw的build目录—minGW-build，用来保存make生成的一系列文件，在 2.1 下载opencv源码的同一目录下新建即可，如下图所示：
[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-XlT2ryjP-1610479952389)(D:\Typora\cpz笔记\笔记中的图片\下载opencv和contrib.png)]

3.3 打开CMake

如果你是默认安装的CMake，那其路径应该是在：

C:\Program Files\CMake\bin

找到 cmake-gui.exe 双击运行。

3.4 CMake编译

3.4.1 configure

下载原博主在其中分享的网盘文件，然后将其拷贝到以下目录：< 这里注意版本，如果你在一开始下载的都不是opencv4.2的话，这里别直接copy并替换；不同版本的OpenCV的缺失文件（有的还会缺失ffmpeg_version.cmake）和下载地址是不一样的，我们需要到CMakeDownloadLog.txt文件中自己查找。下载完成后重命名为:MD值+’-’+下载的文件名，拷贝到.cache相应目录下：>

D:\OpenCV\opencv-4.2.0\opencv-4.2.0

替换原文件夹中的.cashe文件夹即可。

在下图中分别选择OpenCV的源码所在路径(蓝色矩形框) 和 3.2中新建的build目录(粉色矩形框)：

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点击configure，选择MinGW Makefiles，点击finish，等待configure完。

一般情况下，在第一次configure的过程结束之前，会出现下面的四个错误，这是因为在此过程中有几个文件需要下载，但是下载失败了：

出错1：

FFMPEG: Download: opencv_videoio_ffmpeg.dll

Try 1 failed

CMake Warning at cmake/OpenCVDownload.cmake:202 (message):
FFMPEG: Download failed: 35;“SSL connect error”

For details please refer to the download log file:

D:/OpenCV/opencv450_clion/minGW-build/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)

出错2：

FFMPEG: Download: opencv_videoio_ffmpeg_64.dll

Try 1 failed

CMake Warning at cmake/OpenCVDownload.cmake:202 (message):
FFMPEG: Download failed: 35;“SSL connect error”

For details please refer to the download log file:

D:/OpenCV/opencv450_clion/minGW-build/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)

出错3：

FFMPEG: Download: ffmpeg_version.cmake

Try 1 failed

CMake Warning at cmake/OpenCVDownload.cmake:202 (message):
FFMPEG: Download failed: 35;“SSL connect error”

For details please refer to the download log file:

D:/OpenCV/opencv450_clion/minGW-build/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)

出错4：

CMake Warning at cmake/OpenCVGenSetupVars.cmake:54 (message):
CONFIGURATION IS NOT SUPPORTED: validate setupvars script in install
directory
Call Stack (most recent call first):
CMakeLists.txt:976 (include)

3.4.2 四个错误的解决方法

1.错误四的解决方法

先说错误4，出现错误4，可以将上面的 OPENCV_GENERATE_SETUPVARS 勾框去掉：

2.错误一和二的解决方法

从错误的提示信息也可以看出，这是在下载两个文件的过程中出现了问题，解决方法也很简单：

到对应build文件夹下( D:\OpenCV\opencv450_clion\minGW-build ) 的文件 CMakeDownloadLog.txt 中查找对应文件的下载地址；< 都说是要科学上网，我也是科学上网下的 >
将下载的文件名称修改一下，改为：MD-“下载的文件名”；

MD的值是 CMakeDownloadLog.txt 文件中提示的一串十六进制的数。
将修改完名字的文件移动到.cache文件夹下( D:\OpenCV\opencv450_clion\opencv-4.5.0\opencv-4.5.0.cache )

这里说一下，其实在我弄opencv450环境时，在对应的.cache文件夹下( D:\OpenCV\opencv450_clion\opencv-4.5.0\opencv-4.5.0.cache )是有这缺失的文件的，只不过对应的大小都是0；

所以，你在对应网址下载完对应的这两个文件之后，将其移动(or copy)到对应的.cache文件夹下，然后复制初始的对应的文件的名字，然后将该文件删除，然后将该文件对应的下载的文件重命名–粘贴即可。

3.错误三解决方法

从错误三的提示信息也可以看出，是由于 ffmpeg_version.cmake 文件的问题，根据这篇博客的做法，我编译成功了。

简单说，

从对应CMakeDownloadLog.txt 文件中找到ffmpeg_version.cmake 的下载地址

进入此网站

鼠标右键—> 另存为

选择存储路径时，直接选择.cache文件夹下的ffmpeg下即可

==保存类型那里选择 所有文件 ===

文件名字那里—> 直接点击一下该文件夹下的类似这样的文件：f8e65dbe4a3b4eedc0d2997e07c3f3fd-ffmpeg_version.cmake，名字就改好了

然后保存，覆盖即可

3.4.3 修改编译选项

首先需要添加opencv_contrib-4.2.0，在OPENCV_EXTRA_MODULES_PATH 选择你的opencv_contrib解压目录下modules文件夹的路径，勾选OPENCV_ENABLE_NONFREE:

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由于我使用的是minGW编译器，而OpenCV在windows平台上要想编译CUDA版本，只能使用visual studio，所以我无法编译CUDA版本的OpenCV，将CUDA相关选项去掉。如果要使用CUDA版本的OpenCV，要么换Visual Studio，要么换平台（Ubuntu）。如下如所示，在search处搜索cuda，将勾勾去掉：

编译实例 examples：

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把 java 编译相关的去掉：

去掉 python的opencv，我的pycharm上已经有了opencv了，这里去掉：

Eigen，TBB，IPP，LAPACK，VTK等开源包我的电脑都没装，在上面搜索全部去掉小勾勾。如果大家想要这些开源包的加速计算功能的话，先安装开源包到电脑上，再打上小勾勾。( 按照上述方法搜索，然后不选即可 )

3.4.3 再次configure

完成3.4.2之后，再次点击configure，等待完成即可。

如果我没猜错的话，再次configure又出错了，因为我们刚刚添加了 opencv_contrib 的modules，所以这时会有类似下面这样的错误，因为添加了之后，会在.cache文件夹下多出几个文件夹——data、xfeatures2d：

xfeatures2d/boostdesc: Download: boostdesc_bgm.i

Try 1 failed

CMake Warning at D:/OpenCV/opencv450_clion/opencv-4.5.0/opencv-4.5.0/cmake/OpenCVDownload.cmake:202 (message):
xfeatures2d/boostdesc: Download failed: 35;“SSL connect error”

For details please refer to the download log file:

D:/OpenCV/opencv450_clion/minGW-build/CMakeDownloadLog.txt

Call Stack (most recent call first):
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/cmake/download_boostdesc.cmake:22 (ocv_download)
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/CMakeLists.txt:11 (download_boost_descriptors)

xfeatures2d/boostdesc: Download: boostdesc_bgm_bi.i

Try 1 failed

CMake Warning at D:/OpenCV/opencv450_clion/opencv-4.5.0/opencv-4.5.0/cmake/OpenCVDownload.cmake:202 (message):
xfeatures2d/boostdesc: Download failed: 35;“SSL connect error”

For details please refer to the download log file:

D:/OpenCV/opencv450_clion/minGW-build/CMakeDownloadLog.txt

Call Stack (most recent call first):
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/cmake/download_boostdesc.cmake:22 (ocv_download)
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/CMakeLists.txt:11 (download_boost_descriptors)

xfeatures2d/boostdesc: Download: boostdesc_bgm_hd.i

Try 1 failed

CMake Warning at D:/OpenCV/opencv450_clion/opencv-4.5.0/opencv-4.5.0/cmake/OpenCVDownload.cmake:202 (message):
xfeatures2d/boostdesc: Download failed: 35;“SSL connect error”

For details please refer to the download log file:

D:/OpenCV/opencv450_clion/minGW-build/CMakeDownloadLog.txt

Call Stack (most recent call first):
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/cmake/download_boostdesc.cmake:22 (ocv_download)
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/CMakeLists.txt:11 (download_boost_descriptors)

xfeatures2d/boostdesc: Download: boostdesc_binboost_064.i

Try 1 failed

CMake Warning at D:/OpenCV/opencv450_clion/opencv-4.5.0/opencv-4.5.0/cmake/OpenCVDownload.cmake:202 (message):
xfeatures2d/boostdesc: Download failed: 35;“SSL connect error”

For details please refer to the download log file:

D:/OpenCV/opencv450_clion/minGW-build/CMakeDownloadLog.txt

Call Stack (most recent call first):
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/cmake/download_boostdesc.cmake:22 (ocv_download)
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/CMakeLists.txt:11 (download_boost_descriptors)

xfeatures2d/boostdesc: Download: boostdesc_binboost_128.i

Try 1 failed

CMake Warning at D:/OpenCV/opencv450_clion/opencv-4.5.0/opencv-4.5.0/cmake/OpenCVDownload.cmake:202 (message):
xfeatures2d/boostdesc: Download failed: 35;“SSL connect error”

For details please refer to the download log file:

D:/OpenCV/opencv450_clion/minGW-build/CMakeDownloadLog.txt

Call Stack (most recent call first):
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/cmake/download_boostdesc.cmake:22 (ocv_download)
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/CMakeLists.txt:11 (download_boost_descriptors)

xfeatures2d/boostdesc: Download: boostdesc_binboost_256.i

Try 1 failed

CMake Warning at D:/OpenCV/opencv450_clion/opencv-4.5.0/opencv-4.5.0/cmake/OpenCVDownload.cmake:202 (message):
xfeatures2d/boostdesc: Download failed: 35;“SSL connect error”

For details please refer to the download log file:

D:/OpenCV/opencv450_clion/minGW-build/CMakeDownloadLog.txt

Call Stack (most recent call first):
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/cmake/download_boostdesc.cmake:22 (ocv_download)
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/CMakeLists.txt:11 (download_boost_descriptors)

xfeatures2d/boostdesc: Download: boostdesc_lbgm.i

Try 1 failed

CMake Warning at D:/OpenCV/opencv450_clion/opencv-4.5.0/opencv-4.5.0/cmake/OpenCVDownload.cmake:202 (message):
xfeatures2d/boostdesc: Download failed: 35;“SSL connect error”

For details please refer to the download log file:

D:/OpenCV/opencv450_clion/minGW-build/CMakeDownloadLog.txt

Call Stack (most recent call first):
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/cmake/download_boostdesc.cmake:22 (ocv_download)
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/CMakeLists.txt:11 (download_boost_descriptors)

xfeatures2d/vgg: Download: vgg_generated_48.i

Try 1 failed

CMake Warning at D:/OpenCV/opencv450_clion/opencv-4.5.0/opencv-4.5.0/cmake/OpenCVDownload.cmake:202 (message):
xfeatures2d/vgg: Download failed: 35;“SSL connect error”

For details please refer to the download log file:

D:/OpenCV/opencv450_clion/minGW-build/CMakeDownloadLog.txt

Call Stack (most recent call first):
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/cmake/download_vgg.cmake:16 (ocv_download)
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/CMakeLists.txt:12 (download_vgg_descriptors)

xfeatures2d/vgg: Download: vgg_generated_64.i

Try 1 failed

CMake Warning at D:/OpenCV/opencv450_clion/opencv-4.5.0/opencv-4.5.0/cmake/OpenCVDownload.cmake:202 (message):
xfeatures2d/vgg: Download failed: 35;“SSL connect error”

For details please refer to the download log file:

D:/OpenCV/opencv450_clion/minGW-build/CMakeDownloadLog.txt

Call Stack (most recent call first):
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/cmake/download_vgg.cmake:16 (ocv_download)
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/CMakeLists.txt:12 (download_vgg_descriptors)

xfeatures2d/vgg: Download: vgg_generated_80.i

Try 1 failed

CMake Warning at D:/OpenCV/opencv450_clion/opencv-4.5.0/opencv-4.5.0/cmake/OpenCVDownload.cmake:202 (message):
xfeatures2d/vgg: Download failed: 35;“SSL connect error”

For details please refer to the download log file:

D:/OpenCV/opencv450_clion/minGW-build/CMakeDownloadLog.txt

Call Stack (most recent call first):
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/cmake/download_vgg.cmake:16 (ocv_download)
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/CMakeLists.txt:12 (download_vgg_descriptors)

xfeatures2d/vgg: Download: vgg_generated_120.i

Try 1 failed

CMake Warning at D:/OpenCV/opencv450_clion/opencv-4.5.0/opencv-4.5.0/cmake/OpenCVDownload.cmake:202 (message):
xfeatures2d/vgg: Download failed: 35;“SSL connect error”

For details please refer to the download log file:

D:/OpenCV/opencv450_clion/minGW-build/CMakeDownloadLog.txt

Call Stack (most recent call first):
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/cmake/download_vgg.cmake:16 (ocv_download)
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/xfeatures2d/CMakeLists.txt:12 (download_vgg_descriptors)

data: Download: face_landmark_model.dat

Try 1 failed

CMake Warning at D:/OpenCV/opencv450_clion/opencv-4.5.0/opencv-4.5.0/cmake/OpenCVDownload.cmake:202 (message):
data: Download failed: 35;“SSL connect error”

For details please refer to the download log file:

D:/OpenCV/opencv450_clion/minGW-build/CMakeDownloadLog.txt

Call Stack (most recent call first):
D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/face/CMakeLists.txt:13 (ocv_download)

CMake Warning at D:/OpenCV/opencv450_clion/opencv_contrib-4.5.0/opencv_contrib-4.5.0/modules/face/CMakeLists.txt:26 (message):
Face: Can’t get model file for face alignment.

这个时候，你应该很熟悉这个错误了吧，对，完全按照错误三的方式一个一个文件去做就可以了。奥里给，冲！

configure没有红字报错了，我真有点喜极而泣，已经基本完成了：

3.4.4 generate

没有错误之后，点击generate。

3.5 命令行编译和安装

3.5.1 编译

打开cmd，并打开minGW-build 的目录，然后输入：

mingw32-make -j8

这一步是耗时最长的，等待编译完成。

如果你很不幸，在这个过程中又遇到了错误，如下图所示：

gcc: error: long: No such file or directory

解决方法：

在CMake里面把STATS的选项去掉(如下图)—> configure —> generate —> 继续编译mingw32-make -j8

成功后如下图：(绿色的看着好舒服)

3.5.2 安装

在cmd中输入：

mingw32-make install

完成后如下图所示：

完成后会在minGW-build文件夹下有一个install的文件夹，这个文件夹是我们编译生成的OpenCV库。

已经基本大功告成！

四、配置OpenCV

4.1 OpenCV环境变量

将你的install之后的bin目录添加到环境变量 Path 中：

D:\OpenCV\opencv450_clion\minGW-build\install\x64\mingw\bin

4.2 添加 OpenCV_DIR 变量

在系统变量中，新建名称为 OpenCV_DIR的变量，变量值如下：

D:\OpenCV\opencv450_clion\minGW-build\install

4.3 CLion中配置并测试 opencv

新建项目opencv450_test
修改CMakeLists.txt文件为以下内容：

cmake_minimum_required(VERSION 3.17)
project(opencv450_test)

set(CMAKE_CXX_STANDARD 14)
set(OpenCV_DIR "D:\\OpenCV\\opencv450_clion\\minGW-build")

add_executable(opencv450_imshow_test opencv450_imshow_test.cpp)
add_executable(opencv450_version_test opencv450_version_test.cpp)

FIND_PACKAGE(OpenCV REQUIRED)
IF (OpenCV_FOUND)
    INCLUDE_DIRECTORIES(${OpenCV_INCLUDE_DIRS})
    TARGET_LINK_LIBRARIES(opencv450_imshow_test ${OpenCV_LIBS})
    TARGET_LINK_LIBRARIES(opencv450_version_test ${OpenCV_LIBS})
ELSE (OpenCV_FOUND)
    MESSAGE(FATAL_ERROR "OpenCV library not found")
ENDIF (OpenCV_FOUND)

测试程序 opencv450_version_test.cpp ：

#include 
#include 

using namespace cv;

int main()
{
    // ================= 测试1. 输出opencv的版本信息 ===================
    std::cout << "OpenCV version : " << CV_VERSION << std::endl;
    std::cout << "Major version : " << CV_MAJOR_VERSION << std::endl;
    std::cout << "Minor version : " << CV_MINOR_VERSION << std::endl;
    std::cout << "Subminor version : " << CV_SUBMINOR_VERSION << std::endl;
}

测试程序 opencv450_imshow_test.cpp ：

#include 
#include 

using namespace cv;

int main()
{
    // ================= 测试2. 读入一张图片进行imshow显示 ===================
    // 图片路径换成本地的图片路径，注意是两个斜杠
    Mat src = imread("D:\\Clion_Project\\opencv450_test\\messi5.jpg");
    if (src.empty())
    {
        printf("could not load image...\n");
        return -1;
    }

    namedWindow("input image", WINDOW_AUTOSIZE);
    imshow("input image", src);
    waitKey(0);
    destroyAllWindows();
    return 0;
}

4.4 可能出错

若上述完成之后，在CLion中出现报错：(code 后面是一长串数字)

Process finished with exit code -1XXXXXXXX