Visual Studio 2022配置OpenCV455+CMake（Win11）

记录下CMake配置过程。

1  下载

1.1  OpenCV下载

（1）Github源码：https://github.com/opencv/opencv  选择4.5.5版本。

（2）Github扩展源码：https://github.com/opencv/opencv_contrib  选择4.5.5版本。

（3）下载后得到的是两个压缩包，解压。

1.2  CMake下载

官网下载：https://cmake.org/download/  选择Windows x64 Installer版。

2  CMake编译

（1）第一次配置
选择源码、生成路径，VS2022版本x64，等待完成。

（2）调整配置
1.勾选 OPENCV_EXTRA_NONFREE 项
2.勾选BUILD_opencv_world 项
3.添加OPENCV_EXTRA_MODULES_PATH：E:/Tools/OpenCV/opencv_contrib-4.5.5/modules（即 opencv_contrib/modules 路径）
4.Configure，等待完成

3  遇到的警告及解决方案

3.1  ippicv无法下载

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

  For details please refer to the download log file:

  E:/Tools/OpenCV/OpenCV-4.5.5-Build/CMakeDownloadLog.txt

Call Stack (most recent call first):
  3rdparty/ippicv/ippicv.cmake:37 (ocv_download)
  cmake/OpenCVFindIPP.cmake:259 (download_ippicv)
  cmake/OpenCVFindLibsPerf.cmake:12 (include)
  CMakeLists.txt:732 (include)

解决方案：参考

1. 打开E:\Tools\OpenCV\OpenCV-4.5.5-Build文件夹下的CMakeDownloadLog.txt找到
   #do_unpack "ippicv_2020_win_intel64_20191018_general.zip" "879741a7946b814455eee6c6ffde2984" "https://raw.githubusercontent.com/opencv/opencv_3rdparty/a56b6ac6f030c312b2dce17430eef13aed9af274/ippicv/ippicv_2020_win_intel64_20191018_general.zip" "E:/Tools/OpenCV/OpenCV-4.5.5-Build/3rdparty/ippicv"
#check_md5 "E:/Tools/OpenCV/opencv-4.5.5/.cache/ippicv/879741a7946b814455eee6c6ffde2984-ippicv_2020_win_intel64_20191018_general.zip"
2. https://raw.githubusercontent.com/opencv/opencv_3rdparty/a56b6ac6f030c312b2dce17430eef13aed9af274/ippicv/ippicv_2020_win_intel64_20191018_general.zip为下载地址，在https://ghproxy.com/的搜索框输入即可下载
3. 重命名为879741a7946b814455eee6c6ffde2984-ippicv_2020_win_intel64_20191018_general.zip
4. 将重命名后的文件放入E:\Tools\OpenCV\opencv-4.5.5.cache\ippicv中

3.2  ffmpeg无法下载

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:/Tools/OpenCV/OpenCV-4.5.5-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:7 (include)
  modules/videoio/cmake/init.cmake:11 (add_backend)
  cmake/OpenCVModule.cmake:298 (include)
  cmake/OpenCVModule.cmake:361 (_add_modules_1)
  cmake/OpenCVModule.cmake:385 (ocv_glob_modules)
  CMakeLists.txt:927 (ocv_register_modules)

解决方案：

1. opencv_videoio_ffmpeg.dll：https://raw.githubusercontent.com/opencv/opencv_3rdparty/4d348507d156ec797a88a887cfa7f9129a35afac/ffmpeg/opencv_videoio_ffmpeg.dll
   重命名为eece4ec8304188117ffc7d5dfd0fc0ae-opencv_videoio_ffmpeg.dll
2. opencv_videoio_ffmpeg_64.dll：https://raw.githubusercontent.com/opencv/opencv_3rdparty/4d348507d156ec797a88a887cfa7f9129a35afac/ffmpeg/opencv_videoio_ffmpeg_64.dll
   重命名为20deefbfe023c8b8d11a52e5a6527c6a-opencv_videoio_ffmpeg_64.dll
3. ffmpeg_version.cmake：https://raw.githubusercontent.com/opencv/opencv_3rdparty/4d348507d156ec797a88a887cfa7f9129a35afac/ffmpeg/ffmpeg_version.cmake
   右键另存为8862c87496e2e8c375965e1277dee1c7-ffmpeg_version.cmake
4. 将这三个文件放入E:\Tools\OpenCV\opencv-4.5.5.cache\ffmpeg中

3.3  wechat_qrcode无法下载

与1.3.1和1.3.2操作类似。

全部完成后点Generate，等待完成。

4  Visual Studio编译

（1）生成后点Open Project，选择Debug x64或Release x64。
（2）找到ALL_BUILD，右键生成，等待完成。


（3）找到INSTALL，右键，仅当前项目，只生成 INSTALL，等待完成。


（4）E:\Tools\OpenCV\OpenCV-4.5.5-Build\install 该路径为环境配置所需。

5  环境配置

1.添加系统环境变量E:\Tools\OpenCV\OpenCV-4.5.5-Build\install\x64\vc17\bin
2.新建项目属性表（这里配置的是Release版）

3.VC++目录–包含目录添加路径：
E:\Tools\OpenCV\OpenCV-4.5.5-Build\install\include
E:\Tools\OpenCV\OpenCV-4.5.5-Build\install\include\opencv2

4.VC++目录–库目录添加路径：
E:\Tools\OpenCV\OpenCV-4.5.5-Build\install\x64\vc17\lib

5.链接器–输入–附加依赖项添加：
opencv_world455.lib（Release版）
opencv_world455d.lib（Debug版）

6  测试

#include 
#include //日志头文件
#include 

using namespace cv;
using namespace std;

int main()
{
	//utils::logging::setLogLevel(utils::logging::LOG_LEVEL_SILENT);//不输出日志
	//utils::logging::setLogLevel(utils::logging::LOG_LEVEL_ERROR);//只输出错误日志
	Mat src = imread("C:/Users/12421/Desktop/Lena.jpg");
	if (src.empty())
	{
		cout << "please cheak image path" << endl;
		return -1;
	}

	Mat src_x, src_y, src_xy;
	flip(src, src_x, 0);//沿x轴对称
	flip(src, src_y, 1);//沿y轴对称
	flip(src, src_xy, -1);//沿x轴对称，沿y轴对称

	imshow("src", src);
	imshow("src_x", src_x);
	imshow("src_y", src_y);
	imshow("src_xy", src_xy);

	waitKey(0);

	return 0;
}

原图：

结果：

7  其他

1.帮助文档下载：https://docs.opencv.org/
2.OpenCV455Debug版本运行时CMD框会显示很多日志，关闭的方法：参考
添加头文件#include
main()函数里添加语句cv::utils::logging::setLogLevel(utils::logging::LOG_LEVEL_SILENT);

3.Visual Studio编译中第二步出现opencv_test_objdetect test_qrcode_encode.cpp错误，打开并删除日文注释即可。参考