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version is in VC14, which is Visual Studio 2015. Just the next work is also agreed to develop on Visual Studio 2015 Community, so I chose this version. The use of this version, some problems encountered , Make a record. It is recommended to use the Win pack option directly. In addition to the already built library, the source code is also included. The do*nloaded file name will look like opencv-3.2.0-vc14.exe. Do*nload it The exe is a compressed file, you can solve it in any directory. This should not be installed. If you want the X86 version, you need to build it yourself. I need more than just X86, but also the version of the static library, so you need to build it yourself. > Use of MFC –> Use MFC in a Static Librar > Character Set –> Use Multi-Byte Character Set Cv::Mat src = cv::Mat(frame); cv::imshow(window, src); cv::waitKey(30); The installed version of OpenCV 3.2.0 is only the DLL version of X64. If needed Not this version, you have to edit it yourself. For example, the main program uses the X86 compiler settings, you need the X86 DLL version. If you do not want to release, you also have a bunch of DLLs, OpenCV 3.2.0 Source code, need to use CMake to do configuration, and then compile in Visual Studio 2015. 2. After installation, there will be a CMake directory in the program column, where CMake ( cmake-gui ) is to be configured later. 2. Set the location of the OpenCV source code and destination code. source code In the decompressed directory, the destination code is preferably specified separately. 6. Press generate to start generating the project file of Visual Studio 2015. This solution contains 66 projects, so to build for a while, after the build is completed, the following file OpenCV's built-in filter2D function will be generated. The commonly used Mask, or the operation of Filter, Convolution, is usually the backbone of the image-related algorithm, and it is also the most time-consuming part. The operation time of Mask has an absolute relationship with the composition of Mask. Different Masks, to observe the difference in his computing time.