此压缩包为windows下需要手动编译opencv+opencv_contrib模块的依赖文件。大部分情况下无法在cmake时下载成功，故上传整个.cache文件夹压缩包。 其中包含：opencv_videoio_ffmpeg.dll、opencv_videoio_ffmpeg_64.dll、ffmpeg_version.cmake、ippicv_2019_win_ia32_20180723_general、ippicv_2019_win_intel64_20180723_general、vgg_generated、boostdesc等相关文件。下载后替换即可。 资源本就免费，我只是个搬运工。

opencv编译过程中所需下载的vgg_generated有关的四个文件，48,64,80,120

opencv3.2 编译需要用到的vgg_generated_48.i c语言编译使用

e8d0dcd54d1bcfdc29203d011a797179-vgg_generated_48.i

OpenCV3.4.5+opencv_contrib 解决在编译过程中出现C1083 Cannot open include file: 'vgg_generated_120.i': No such file or directory opencv_xfeatures2d的错误，从编译文件夹下的CMakeDownloadLog.txt文件里找到下载的路径，然后直接下载就可以了。之后放到opencv_contrib-3.4.5\modules\xfeatures2d\src，重新configure、generate。

opencv-cmake 编译opencv4的缺失文件，包含ffmpeg、vgg_generated、boostdesc、ippicv等25个文件

包含以下文件： boostdesc_bgm.i boostdesc_bgm_bi.i boostdesc_bgm_hd.i boostdesc_lbgm.i boostdesc_binboost_064.i boostdesc_binboost_128.i boostdesc_binboost_256.i vgg_generated_120.i vgg_generated_64.i vgg_generated_80.i vgg_generated_48.i

CMake配置生成opencv4的时候，遇到缺少一些模块无法连接服务器进行下载的报错： Couldn't connect to server from the Internet. Perhaps direct connections are not allowed in the current network. To use proxy please check/specify these environment variables: - http_proxy/https_proxy - and/or HTTP_PROXY/HTTPS_PROXY 可以下载本资源结合我的博文（https://editor.csdn.net/md/?articleId=121682921）进行配置就可以顺利成功解决问题了。

ippicv_2019_lnx_intel64_general_20180723.tgz ,boostdesc_binboost_128.i,boostdesc_binboost_064.i ,boostdesc_bgm.i,boostdesc_lbgm.i,vgg_generated_64.i,boostdesc_bgm_bi.i,boostdesc_binboost_256.i,vgg_generated_48.i,boostdesc_binboost_128.i,boostdesc_bgm_hd.i,vgg_generated_120.i,boostdesc_binboost_064.i,vgg_generated_80.i 等 ，编译opencv-4.1.2和opencv_contrai-4.1.2时使用的

vgg_generated_48.i vgg_generated_64.i vgg_generated_80.i vgg_generated_120.i