opencv python 编译_win10 vs2019 编译 opencv4.5 + pyhton3 +cuda

20201017更新

前置条件

vs2019

也就是所谓的vc16. 要检测是否安装了完整的C++功能和cmake支持，用vs 的installer可以选上。

否则cmake的configure都会报错。

1 下载源码

2 configure

选上

BUILD_opencv_world

NONFREE必须开，否则即使下载的opencv_contrib也不包含sift等等nonfree库了

注意路径中的分割线，必须是linux的

D:/opencv/opencv_contrib-4.5.0/modules

cuda：

选上

WITH_CUDA

WITH_CUDNN

修改 CUDA_ARCH_BIN

这个针对不同计算能力的GPU，编译不同版本，但是这部分特别慢，只能单线程编译。

只编译自己用到的，或者可能部署用到的就可以。

我能用到的显卡基本也就是

所以只保留这2个就可以啦。

其他

基本上多点几次Configure，直到不报错就OK。

如果报warning:

CMake Warning at cmake/OpenCVGenSetupVars.cmake:54 (message):

CONFIGURATION IS NOT SUPPORTED: validate setupvars script in install directory Call Stack (most recent call first)

去掉这个编译选项，应该没啥用

python3路径现在已经能自动识别

python3的路径一个一个补上：注意library 很迷惑，有python3.lib和 .a的。注意区别

其他要注意的也就是这些了，那个OPENCV_PYTHON3_VERSION没啥用，选上好像就编译cv2.pyd不过了。保持空就可以。

1 需要迷信下载的缓存文件1：

打开 D:/opencv/opencv-4.5.0/build/CMakeDownloadLog.txt

如果正常，应该看到：

#use_cache "D:/opencv/opencv-4.5.0/.cache"

#match_hash_in_cmake_cache "OCV_DOWNLOAD_IPPICV_HASH_3rdparty_ippicv_ippicv_2020_win_intel64_20191018_general_zip"

#match_hash_in_cmake_cache "OCV_DOWNLOAD_ADE_HASH_3rdparty_ade_v0_1_1f_zip"

#match_hash_in_cmake_cache "OCV_DOWNLOAD_FFMPEG_HASH_3rdparty_ffmpeg_opencv_videoio_ffmpeg_dll"

#match_hash_in_cmake_cache "OCV_DOWNLOAD_FFMPEG_HASH_3rdparty_ffmpeg_opencv_videoio_ffmpeg_64_dll"

#match_hash_in_cmake_cache "OCV_DOWNLOAD_FFMPEG_HASH_3rdparty_ffmpeg_ffmpeg_version_cmake"

#match_hash_in_cmake_cache "OCV_DOWNLOAD_XFEATURES2D_BOOSTDESC_HASH_downloads_xfeatures2d_boostdesc_bgm_i"

#match_hash_in_cmake_cache "OCV_DOWNLOAD_XFEATURES2D_BOOSTDESC_HASH_downloads_xfeatures2d_boostdesc_bgm_bi_i"

#match_hash_in_cmake_cache "OCV_DOWNLOAD_XFEATURES2D_BOOSTDESC_HASH_downloads_xfeatures2d_boostdesc_bgm_hd_i"

#match_hash_in_cmake_cache "OCV_DOWNLOAD_XFEATURES2D_BOOSTDESC_HASH_downloads_xfeatures2d_boostdesc_binboost_064_i"

#match_hash_in_cmake_cache "OCV_DOWNLOAD_XFEATURES2D_BOOSTDESC_HASH_downloads_xfeatures2d_boostdesc_binboost_128_i"

#match_hash_in_cmake_cache