Download Opencv C++ For Windows

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If you plan on executing C++ code using Cmake, then download and install from here (windows win64-x64 Installer), and follow instructions below. The third line specifies the Visual Studio version on your system.



download opencv c++ for windows

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I'm attempting to use OpenCV for Windows as supplied by opencv.org in a project I'm building with JetBrains' CLion IDE. I've installed the opencv library and configured CLion (set(OpenCV_DIR) to reference the build directory under it, but CMake issues the warning:


I've tried some of the older distributions from opencv.org with the same results. It appears CMake is locating the OpenCV libraries, but doesn't want to use them. Why, and how do I get the OpenCV libraries to work under CLion?


Problems may occur when variable names used by OpenCVConfig.cmake conflict with those CLion has stored in its environment. In particular, if your OpenCV was built by Microsoft Visual C (MSVC), as is the Windows distribution from opencv.org, it won't work with CLion.


Since opencv-python version 4.3.0.*, manylinux1 wheels were replaced by manylinux2014 wheels. If your pip is too old, it will try to use the new source distribution introduced in 4.3.0.38 to manually build OpenCV because it does not know how to install manylinux2014 wheels. However, source build will also fail because of too old pip because it does not understand build dependencies in pyproject.toml. To use the new manylinux2014 pre-built wheels (or to build from source), your pip version must be >= 19.3. Please upgrade pip with pip install --upgrade pip.






A: It's easier for users to understand opencv-python than cv2 and it makes it easier to find the package with search engines. cv2 (old interface in old OpenCV versions was named as cv) is the name that OpenCV developers chose when they created the binding generators. This is kept as the import name to be consistent with different kind of tutorials around the internet. Changing the import name or behaviour would be also confusing to experienced users who are accustomed to the import cv2.


Hi Sir again, I want to build opencv 3.4 with the extra module for java application and i follow your blog and thank you, i wanna ask if what do i need to change in my configurations because this following error occurs everytime:


Try the following steps: (you might have already tried them, but I suggest you following it again with attention)

1 - Check if your C:\opencv\install\x64\mingw\bin folder has a file named opencv_ffmpeg340_64.dll. If not, try recompiling your OpenCV with the option WITH_FFMPEG checked in CMake;

2 - Confirm if your C:\opencv\install\x64\mingw\bin is added to your system PATH (The SYSTEM path not only for the USER);

3 - Check if C:\opencv\install\x64\mingw\bin is added on your Project's Library Search Path (Project > Properties > C/C++ Build > Settings > MinGW C++ Linker > Libraries).


I found that there is no opencv_ffmpeg340_64.dll is not there in the D:\Personal\opencv_3.4\opencv\mingw_build_3.4\install\x64\mingw\bin folder.

I reconfigured the cmake, but its till not generating into that folder.


I tried to add the path of the generated libopencv_340.dll in the vm options of my project and im still getting this error..i already follow the solutions provided in the blog of Mr.Zamrath Nizam..what should i do..Thank you


Hi, the build process without the contrib moduls worked fine, but I definitely need these extra packages.

I use mingw-w64 version 8.1.0, CMake 3.12.2, opencv 3.2 and opencv 3.4.1.

I did the installation with both opencv versions, but always got errors.

The warning in CMake is


And can you tell me the steps for the contrib modules in detail, do I have to configure opencv first without extra packages, then add the extra modules path and configure again or just hit the generate button then?


Thank you for the answer! I did it again with opencv 3.4.1 and opencv contrib 3.4.1 and followed the tutotrial steps with including the extra modules path, but again got the error at 62% of the build process.

Do you have any other tips for me? Do I have to uncheck more options in CMake or how du I have to configure the mingw installation for example?


Hi, sorry for the delay.

Could you please show a screenshot of the error?

(I suggest you to try checking if the extra modules path is set to /opencv_contrib/modules

Also, you can try to enable/disable ENABLE_CXX11 and/or INSTALL_C_EXAMPLES)


By default, OpenCV is expected to be in C:\opencv\build\install\include. This behavior can be disabled by supplying -tags customenv when building/running your application. When building with this tag you will need to supply the CGO environment variables yourself.

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