編譯OpenCV3.1和OpenCV_contrib

編譯報錯

CMake Error at C:/allKindOfLibs/opencv-3.1.0/cmake/OpenCVUtils.cmake:895 (file):

file DOWNLOAD cannot open file for write.
Call Stack (most recent call first):

C:/allKindOfLibs/opencv_contrib-master/modules/dnn_modern/CMakeLists.txt:18 (ocv_download)

因爲opencv和opencv_contrib的版本要對應，下面是鏈接

opencv_contrib

另外，Cmake路徑在window下，路徑分隔符是單斜槓/，而windows下，路徑是反斜槓的\，不可以直接複製文件夾路徑。否則報錯invalid escape sequnce，而應該在cmake中選取路徑