VS+CMake+opencv3+opencv_contrib

1、环境及准备： 1) VisualStudio 2) CMake下载地址：https://cmake.org/download/  3) OpenCV下载地址：https://github.com/opencv/opencv/releases 4) OpenCV_contrib下载地址：https://github.com/opencv/opencv_contrib/releases  注：本文

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